Alphabetical Listing of Terms

in Ellis' British Railway Engineering Encyclopaedia Fourth Edition, all 15,700 main entries) Updated October 2019

Numbers

%g ~ % of g ~ 00 ~ 1 in 20 ~ 1 in x ~ 1 in x resleepering ~ 1.25 1.61 ~ 10 foot ~ 100 ~ 100 pound ~ 105 ~ 105 pound ~ 106 ~ 106 pound ~ 109 ~ 109 pound ~ 11.82 ~ 110 ~ 110 pound ~ 110A ~ 110 kg chrome rail ~ 113 ~ 113 pound ~ 113A ~ 113A rail ~ 113A flat bottom ~ 113A flat bottom rail ~ 113A flat bottomed rail ~ 113A full depth switches ~ 113A shallow depth switches ~ 113A vertical ~ 113A vertical S&C ~ 127FB TWS rail ~ 127TWS ~ 150 pound ~ 1958 letter, the ~ 1969 ~ 2+1 ~ 2+2 ~ ⅔ / ⅓ rule ~ 2009 Tube Stock ~ 3-alpha codes ~ 3-link coupling ~ 3+2 ~ 33 kilo ~ 3MG ~ 4 Foot ~ 4 wire VF ~ 48f ~ 4QC ~ 5 foot ~ 50 pound ~ 56 kilo ~ 5th percentile ~ 6 foot ~ 6 foot drain ~ 60 kilo ~ 60B ~ 60B rail ~ 650 ~ 7DR ~ 80 pound ~ 85 pound ~ 85 pound bull head ~ 9 foot ~ 9 foot rule ~ 90 kg chrome rail ~ 95 lb RBS ~ 95 lb RBS BH ~ 95 pound ~ 95 pound bull head ~ 95 tube stock ~ 95RBS ~ 95th percentile ~ 97½ pound ~ 98 pound

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A

A ~ A exam ~ A leg ~ A stock ~ A switch ~ A-frame ~ A-frame structure ~ A-SDO ~ A-type bridge ~ A/C ~ A&NR ~ A1 ~ A4A ~ A69 ~ A73 ~ AA ~ AAA ~ AAAC ~ AAC ~ AADT ~ AAM ~ AAR ~ AARKND ~ AAS ~ AAT ~ AATC ~ AB ~ abandonment ~ ABB ~ ABB Transportation ~ Abbots Ripton accident ~ abbreviated injury scale (AIS) ~ ABC ~ ABC1 ~ ABCB ~ ABCL ~ ABD ~ Abellio ~ Abellio ScotRail ~ Abermule accident ~ abnormal heavy road load (AHRL) ~ abnormal rail head conditions ~ abnormal road load indemnity (ARLI) ~ abnormal road load notification (ARLN) ~ above rail level (ARL) ~ ABOVE SB ~ ABP ~ ABS ~ absence switch ~ ABSI ~ absolute block (AB) ~ absolute block principles ~ absolute gauging ~ absolute possession ~ absolute track geometry ~ ABT ~ Abt rack system ~ abutment ~ abutting sections ~ abutting traction current section ~ ABX ~ AC ~ AC capacitor-fed single rail track circuit ~ AC electrification system ~ AC electrified line ~ AC immune ~ AC track circuit ~ AC/DC TRIP ~ ACA ~ ACAC ~ ACB ~ ACC ~ ACCA ~ ACCAT ~ accelerated GRIP ~ accept ~ acceptance ~ ACCEPTANCE ~ accepted ~ accepting ~ access ~ access agreement ~ Access and Management Regulations ~ access charge ~ Access Dispute Resolution Rules ~ Access Disputes Committee ~ Access for All (AFA) ~ access permit ~ access point ~ access unit ~ access wagon ~ accessible route ~ accessible structure ~ accident ~ ACCOLC ~ accommodation bridge ~ accommodation crossing ~ accommodation level crossing (ALC) ~ Accredited Agent ~ ACCT ~ ACE ~ ACEIC ~ ACF ACFM ~ ACG ~ achievable reading distance ~ Achilles ~ ACI ~ ACIO ~ ACK ~ acknowledge switch ~ ACM ~ ACMR ~ ACOP ~ AcoRP ~ ACR ~ ACS ~ ACSC ~ active network ~ active tilt ~ active traction current section ~ active warning ~ ACTO ~ ACTRAFF ~ actual extension ~ acute crossing ~ AD ~ AD fastening ~ AD&R ~ Adams, William Bridges ~ adaptor vehicle ~ ADAS system ~ ADB ~ ADD ~ additional protection ~ ADE ~ Adelante ~ ADEPT ~ adequate distance ~ ADG ~ ADHESION ~ adhesion ~ adhesion worked ~ Adhesion Working Group, The ~ ADI ~ ADIP ~ adjacent line adjacent line open (ALO) ~ Adjacent Line Open Coordinator ~ Adjacent Line Open Site Coordinator ~ adjustable dropper ~ adjustable stretcher bar ~ adjustment switch ~ adjustment time ~ Adlake ~ Adlake lamp ~ ADM ~ Admiralty tray ~ ADP ~ ADR ~ ADRC ~ ADU ~ advance ~ advance Lookout ~ advance warning board (AWB) ~ advance warning indicator (AWI) ~ Advanced Passenger Train (APT) ~ Advanced Passenger Train transponder ~ advanced starting signal ~ adze ~ AE ~ AEA Technology Plc. (AEAT) ~ AEAT ~ AEB ~ AEDTF ~ AEEU ~ AEI ~ AEIF ~ AEJF ~ AEM ~ AER ~ aerial earth ~ aerial earth wire (AEW) ~ aerial feeder ~ AET ~ AEW ~ AF ~ AF track circuit ~ AFA ~ AfA ~ AFAIRP ~ Afaria ~ AFC ~ AFD ~ AFEDEF ~ affect the normal passage of trains ~ affect the safety of the line ~ affect the safety of train working ~ AFFF ~ AFI ~ AFIGP ~ AFILS ~ AFM ~ AFR ~ AFSS ~ AFT ~ AFTC ~ AG ~ AGA ~ AGC ~ age of road diagram (AOR diagram) ~ Agecroft accident ~ Agent de Feu ~ AGREED EXC AGRRI ~ AGS ~ AGT ~ AH ~ AHB ~ AHBC ~ AHBLC ~ ahead ~ ahead of ~ AHRL ~ AI ~ AICMR ~ AIM ~ AIOAMV ~ AIP ~ AIR ~ air blast circuit breaker (ABCB) ~ air blow ~ air brake ~ air braked ~ air brakes ~ air cock ~ air distribution unit (ADU) ~ air gap ~ air leakage test ~ air piped ~ air rights development ~ airlock ~ AIRPS ~ Airtrack ~ AIS ~ Ais Gill accident ~ AIT ~ AiTL ~ AIV ~ AIWP ~ AJ ~ AJAX ~ AJR ~ AK ~ AKM ~ AKPM ~ AKSRG ~ AL ~ ALARA ~ ALARM ~ ALARP ~ ALC ~ ALCF ~ ALCRM ~ ALCRM risk score ~ alert limit ~ alias plate ~ alight ~ aligning ~ alignment ~ alignment point ~ alignment target ~ alignment variations ~ alive ~ All Level Crossing Risk Model (ALCRM) ~ all night running ~ all orange ~ all signals on ~ all signals on switch ~ all stations ~ Allcard, William ~ alliance ~ Alliance coupler ~ Alliance coupling ~ allied traction current section ~ ALLOC STCK ~ allocation designer ~ allocation diagram ~ ALO ~ ALO coordinator ~ ALO site coordinator ~ alongside conductor rails ~ ALOSPOSS ~ alpha ~ alphanumeric route indicator (ARI) ~ ALR ~ ALRMS ~ ALRV ~ ALSF ~ Alstom ~ alternating current field measurement (ACFM) ~ alternative feed ~ alternative feed switch ~ alternative line control function (ALCF) ~ aluminium-stainless steel conductor rail (ASC rail) ~ alumino-thermic ~ alumino-thermic reaction ~ alumino-thermic weld ~ AM ~ AM&EE ~ AMBER ~ amber ~ Amber trolley ~ AMBR ~ AMBR pantograph ~ AMC ~ AMCL ~ AME ~ AMEM ~ amenity coach (AMC) ~ American Railway Engineering and Maintenance of Way Association (AREMA) ~ AMI ~ AMIP ~ AML ~ AMOS ~ Amotherm weld ~ AMP ~ AMPP ~ AMPS ~ AMR ~ AMS ~ AMU ~ AMULET ~ AMW ~ anchor ~ anchor length anchor structure ~ anchor struts ~ ancillary movement ~ ancillary structures ~ ancillary wires ~ Anderton Concrete ~ andrew ~ Angel ~ Angel Train Contracts (ATC) ~ Angel Train Group ~ Angerstein release ~ angle of attack (AOA) ~ angle of deflection ~ angle of depression ~ angle of elevation ~ angles ~ Anglia Railways (AR) ~ Anglia Region (AR) ~ Anglia Route (AR) ~ Angus system ~ ANIMAL ~ ankle ~ Annett’s key ~ Annett’s lock ~ annual renewal plan (ARP) ~ annunciation point ~ annunciator ~ anomalies ~ anomalous platform clearance ~ anorak another train coming sign (ATC sign) ~ ANS ~ Ansaldo ~ Ansaldo Signalling and Transportation Systems ~ Ansaldo STS ~ ANSI ~ anteater ~ anti-attrition pad ~ anti-climb board ~ anti-climb guard (ACG) ~ anti-climber ~ anti-fall mechanism ~ anti-preselection ~ anti-separation pin anticipation ~ any line open (ALO) ~ AOA ~ AOCL ~ AOCL+B ~ AOCR ~ AOD ~ AOD: HS ~ AOD: LXA ~ AOD: PO ~ AOM ~ Aonad Imscrúdaithe Timpistí Iarnróid ~ AONB ~ AOOU ~ AOR diagram ~ AoS ~ AOSF ~ AP ~ APA ~ APC ~ APC magnet ~ APC track inductor ~ aperture ~ API ~ Aplan ~ APM ~ APOLS ~ APOT ~ APP ~ apparatus case ~ apparatus housing ~ appendix A braking ~ appendix B braking ~ appendix C braking ~ appendix D Braking ~ application design ~ application level ~ application logic ~ application unit ~ applied cant ~ appraisal of sustainability (AoS) ~ approach control ~ approach controlled ~ approach lighting ~ approach locking ~ approach release ~ approach released ~ approach speed approach to ~ approaching train ~ approval and issues record (AIR) ~ approval certificate ~ approval in principle (AIP) ~ approved for construction (AFC) ~ APR ~ apron ~ APRS ~ APS ~ APT ~ APT transponder ~ APT-E ~ APT-P ~ APT-S ~ APTDM ~ APTIS ~ APU ~ APWSS ~ AQL ~ AQMA ~ AR ~ ARAFOAL ~ ARAMIS ~ arbour Lights ~ ARC ~ arc chute ~ arc eye ~ arc protection ~ arc splash protection ~ Arcadis ~ arch ~ arch back ~ arch barrel ~ arch bridge ~ arch cladding ~ arch crown ~ arch face ~ arch lining ~ arch ring ~ arcing ~ ARD ~ ARDV ~ area ~ AREA ~ Area Civil Engineer (ACE) ~ Area Mechanical and Electrical Engineer (AM&EE) ~ area of conflict ~ Area Signalling and Telecommunications Engineer (AS&TE) ~ AREMA ~ ARF ~ ARI ~ ARISE ~ ARL ~ ARLI ~ ARLN ~ arm ~ ARM ~ arm repeater (AR) ~ Armagh Accident ~ armbands ~ ARME arming loop ~ ARMS ~ Arneke ~ ARNO ~ ARP ~ ARPS ~ ARRC ~ Arriva Rail London (ARL) ~ Arriva Trains Northern (ATN) ~ Arriva Trains Wales (ATW) ~ arrival ~ arrival line ~ Arrol, Sir William ~ ARROW ~ ARS ~ ARS+ ~ ART ~ articulated ~ articulated vehicle ~ articulation module ~ ARTL ~ ARTP ~ ARU ~ AS chairscrew ~ as far as is reasonably practicable (AFAIRP) ~ as low as reasonably achievable (ALARA) ~ as low as reasonably possible ~ as low as reasonably practicable (ALARP) ~ AS(HT) chairscrew ~ AS&TE ~ AS1 ~ AS1 chair ~ AS2 ~ AS2 Chair ~ ASB ~ AsBo ~ ASBPC ~ ASC ~ ASC rail ~ ASDO ~ ASET ~ ash ~ ashlar ~ ASID ~ ask the road ~ asking lever ~ ASL ~ ASLEF ~ ASM ~ ASP ~ ASP baseplate ~ aspect ~ aspect display unit (ADU) ~ aspect level ~ aspect sequence ~ aspect sequence chart ~ ASPER ~ Aspinall, Sir John ~ ASPR ~ AsPro ~ ASR ASRC ~ ASS ~ assessed minimum reading time ~ assessment ~ assessment body (AsBo) ~ assessment code of practice ~ assessment in the line (AiTL) ~ asset ~ asset condition speed restriction ~ asset maintenance plan (AMP) ~ asset maintenance plan provision (AMPP) ~ asset steward ~ Assistant Track Section Manager (ATSM) ~ assisting in rear ~ associated renewals ~ Association Européenne pour l’Interopérabilité Ferroviaire (AEIF) ~ Association of Community Rail Partnerships (AcoRP) ~ Association of Independent Railways (AIR) ~ Association of Independent Railways and Preservation Societies (AIRPS) ~ Association of Railway Preservation Societies (ARPS) ~ Association of Train Operating Companies (ATOC) ~ Aster ~ ASTR ~ astragal ~ ASW ~ asymmetric rail section ~ asymmetric trapped conventional rail (ATC) ~ asynchronous motor ~ AT ~ AT equipment ~ at ~ at risk earthwork ~ at risk earthworks register ~ AT system ~ at-grade ~ at-grade crossing ~ at-grade junction ~ at-risk earthwork ~ at-risk earthworks register ~ ATA ~ ATAS ~ ATB ~ ATC ~ ATC sign ~ ATCO ~ ATD ~ ATE ~ ATF ~ ATFS ~ ATG ~ ATH ~ Atk. ~ ATL ~ ATLAS ~ ATM ~ ATME ~ ATMF ~ atmospheric railway ~ ATMS ~ ATN ~ ATO ~ ATOC ~ ATOC standards ~ ATOMIC ~ ATOR ~ ATOS ~ ATP ~ ATP manual ~ ATPM ~ ATR ~ ATRE ~ ATS ~ ATSM ~ ATT ~ ATT/DETACH ~ ATTA ~ attainable speed ~ ATW ~ ATWS ~ audible warning ~ Audigage ~ audio frequency track circuit (AFTC) ~ AUDRI ~ AUI ~ austenitic ~ austenitic manganese steel (AMS) ~ Austroroll ~ AUTH CON ~ AUTH CONN ~ AUTH SSO ~ authorised derogation ~ authorised movement ~ authorised person (AP) ~ authorised user ~ authorised walking route ~ authorising authority (AA) ~ authority to test (form B) ~ authority to work (ATW) ~ AUTHSD CON ~ AUTHSD SSO ~ autic ~ autic six ~ auto ~ Auto Ballaster (HQA, JJA) ~ auto coupler ~ auto coupler contact block ~ Auto LCRM ~ auto lower ~ auto normalise ~ auto normalising ~ auto raise ~ auto reverse ~ auto signal ~ auto telephone ~ auto working ~ auto-lower ~ auto-normalise ~ auto-tensioned (AT) ~ auto-tensioner ~ auto-train ~ autocoach ~ automated finishing machine (AFM) ~ automated track monitoring system (ATMS) ~ automated voice announcer (AVA) ~ automatic air brake ~ automatic air brake pipe ~ automatic ballast cleaner (ABC) ~ automatic ballast sampler (ABS) ~ automatic barrier ~ automatic barrier crossing (ABX) ~ automatic barrier crossing locally monitored (ABCL) ~ automatic brake ~ automatic brake application ~ automatic code insertion (ACI) ~ automatic coupling ~ automatic dropping device (ADD) ~ automatic function ~ automatic half barrier crossing (AHB, AHBC) ~ automatic home signal release ~ automatic level crossing ~ automatic lining control (ALC) ~ automatic lower automatic mode ~ automatic open crossing locally monitored (AOCL) ~ automatic open crossing locally monitored plus barriers (AOCL+B) ~ automatic open crossing remotely monitored (AOCR) ~ automatic point ~ automatic recording point ~ automatic power control (APC) ~ automatic power control magnet ~ automatic power control track inductor ~ automatic raise ~ automatic resetting and restoration to service ~ automatic route setting ~ Automatic Route Setting Subsystem (ARS) ~ automatic routing facility (ARF) ~ automatic SDO ~ automatic selective door opening ~ automatic signal (auto, auto signal) ~ automatic speed control ~ automatic speed limiter ~ automatic tamping and lining machine ~ automatic track alignment (ATA) ~ automatic track and top alignment (ATTA) ~ automatic track design (ATD) ~ automatic track warning system (ATWS) ~ automatic train announcement system (ATAS) ~ automatic train control (ATC) ~ automatic train describer (ATD) ~ automatic train operation (ATO) ~ automatic train protection (ATP) ~ automatic train regulation (ATR) ~ automatic train reporting (ATR) ~ automatic train supervision (ATS) ~ automatic train warning system (ATWS) ~ automatic vacuum train pipe ~ automatic vehicle identification (AVI) ~ automatic warning system (AWS) ~ automatic warning system cancelling indicator (AWS cancelling indicator) ~ automatic warning system gap (AWS gap) ~ automatic warning system magnet ~ automatic warning system visual indicator ~ automatic working ~ automatically tensioned system (ATS) ~ autonormalisation ~ autonormalisation of points ~ autotransformer (AT) ~ autotransformer feeder (AF, ATF) ~ autotransformer feeding system (AT, AT System) ~ autotransformer site (ATS) ~ autotransformer system (AT, AT System) ~ auxiliary ~ auxiliary air reservoir ~ auxiliary catenary ~ auxiliary catenary wire ~ auxiliary feeder (AF) ~ auxiliary power circuit ~ auxiliary rail ~ auxiliary reservoir ~ auxiliary signal ~ auxiliary supply ~ auxiliary supply point (ASP) ~ auxiliary token instrument ~ AVA ~ AVACS ~ availability ~ AVB ~ AVC ~ AVCS ~ average gradient ~ average minutes lateness (AML) ~ average size wheel ~ averaging out ~ AVI ~ AVL ~ AVM ~ avoiding ~ avoiding line ~ AvON ~ AVS ~ AVS survey ~ AVS validation survey ~ AVSMS ~ AW ~ AWA ~ AWAC ~ AWB ~ AWG ~ AWI ~ AWIC ~ AWS ~ AWS cancelling indicator ~ AWS gap ~ AWS magnet ~ AWS visual indicator ~ AWS/ATP ~ AX ~ AXC ~ AxCC ~ AXIAT ~ Axiom Rail ~ axle brush ~ axle counter ~ axle counter block section ~ axle counter evaluator (ACE) ~ axle counter head ~ axle counter section ~ axle end cap ~ AXLE FLR ~ axle guard ~ axle hung ~ axle load ~ axle load speed profile (ASP) ~ axle weight ~ axlebox ~ axlebox horn ~ Axon, John, GC ~ AZ

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B

B ~ B contact ~ B exam ~ B leg ~ B stock ~ B switch ~ B-type bridge ~ B&C ~ B&Co ~ B&F ~ B&MR ~ B&R ~ B1 ~ B1 bogie ~ B1 isolation ~ B2 isolation ~ B2BC ~ B4 ~ B4 bogie ~ BA ~ BA&CLR ~ BAA ~ BABT ~ back ~ back ‘un ~ back blinder ~ back board ~ back contact ~ back crossing ~ back drive ~ back edge (BE) ~ back edge corner ~ back face ~ back feed ~ back fishbolt hole ~ back hole ~ back hole drilling ~ back hole fishing ~ back light ~ back of head ~ back of platform fence ~ back of platform wall ~ back platform ~ back rails ~ back road ~ back shift ~ back signal ~ back slotting ~ back spectacle ~ back tie ~ back to back cantilevers (B2BC) ~ back to back crossovers ~ back to back dimension ~ back to back leads ~ back to back radio ~ back to back TTC ~ back to back twin track cantilever ~ back to London ~ back to low mileage ~ back-to-back lights ~ back-to-back routes ~ back-tripped ~ backdrive ~ backfill ~ backing signal ~ backing up ~ backlight ~ backlock ~ backlocked ~ backlocking ~ backscar ~ BAFE ~ BAFO ~ bag ~ baggin ~ Bailey bridge ~ Baines ~ bainite ~ bainitic ~ bainitic rail ~ Baker, Sir Benjamin ~ balance plate ~ balance weight ~ balance weight anchor (BWA) ~ balanced incline ~ balanced maintenance (BM) ~ balanced semaphore arm ~ balanced stock ~ balancing cant ~ balancing speed ~ bale ~ Balham control ~ BALISE ~ balise ~ balise encoder programming and test tool (BEPT) ~ balise group ~ ball and claw ~ ballast ~ ballast attrition ~ ballast bags ~ ballast basket ~ ballast bed ~ ballast board ~ ballast cleaner ~ ballast cleaner ramping ~ ballast cleaner return ~ ballast cleaner screenings ~ ballast cleaner spoil ~ ballast cleaning ~ ballast cleaning system (BCS) ~ ballast condition ~ ballast consolidation ~ ballast depth ~ ballast distribution system (BDS) ~ ballast drag ~ ballast fines ~ ballast fork ~ ballast gluing ~ ballast hopper ~ ballast hump ~ ballast memory ~ ballast packing ~ ballast plate ~ ballast plough ~ ballast profile ~ ballast pyramid ~ ballast ramp ~ ballast regulation ~ ballast regulator ~ ballast resistance ~ ballast retaining wall ~ ballast return ~ ballast riddling ~ ballast shoulder ~ ballast shoulder surcharge ~ ballast sidings ~ ballast stool ~ ballast tip ~ ballast track ~ ballast train ~ ballast tray ~ ballast wagon ~ ballast wall ~ ballasted area ~ ballasted deck ~ ballasted track ~ ballasting ~ ballastless track (BLT) ~ BANANA ~ Bance trolley ~ Bance wrench ~ Band III ~ banding ~ bang road ~ bangers ~ banjo ~ bank ~ bank foot ~ bank head ~ bank head man ~ bank seat ~ bank slip ~ bank top ~ bank trim ~ banker ~ banking ~ banking locomotive ~ banksman ~ banner ~ Banner Repeater (BR) ~ banner repeating signal (BR) ~ BAP ~ BAPA ~ BAR ~ bar ~ bar coupler ~ bar coupling ~ bar rail ~ Barbel (ZKV) ~ Barbie ~ Bardic lamp ~ bare feeder (BF) ~ Barlow rail ~ Barlow, Peter ~ Barlow, Peter William ~ Barlow, William Henry ~ barrel arch ~ barrier ~ barrier class ~ barrier control pedestal ~ barrier pedestal ~ barrier skirt ~ barrier unit ~ barrier vehicle ~ barriers up indicator ~ barrow crossing ~ BARS ~ Bartlett, Charles H ~ bascule bridge ~ base rail ~ base roster ~ base station ~ baseband data highway ~ baseplate (BP) ~ baseplate gall ~ baseplate pad ~ baseplate screw ~ baseplate shims ~ baseplate shuffle ~ basic insulation ~ basic visual track inspection ~ BASICS ~ Basil Brush ~ BASIR ~ BASREC ~ BASS ~ Bass (ZDA) ~ bat lighting ~ bathymetric survey ~ BATNEEC ~ baton ~ BATS ~ batter ~ battered ~ battering ~ Battersea Park accident ~ battery ~ battery electric multiple unit (BEMU) ~ battery locomotive ~ battle deck ~ battleship splice ~ BAU ~ baulk road ~ bay ~ bay line ~ bay platform ~ BB ~ BB14072 ~ BBASIS ~ Bbest rail ~ BBMS ~ BBR ~ BBRL ~ BBRM ~ BBRP ~ BBRPL ~ BBRR ~ BBV ~ BC ~ BCAM ~ BCDG ~ BCF ~ bch. ~ BCI ~ BCK ~ BCL ~ BCMI ~ BCO ~ BCR ~ BCRP ~ BCS ~ BCT ~ BCU ~ BCV ~ BD ~ BDA ~ BDB ~ BDBSO ~ BDG STRIKE ~ BDGE OPEN ~ BDM ~ BDMS ~ BDMSO ~ BDP ~ BDRA ~ BDS ~ BDT ~ BDTBSO ~ BDTC ~ BDTLV ~ BDTS ~ BDTSO ~ BE ~ be ready ~ BEA-TT ~ Beacon Rail Leasing ~ beam ~ BEAP ~ bearer ~ bearer bottom (BB) ~ bearer rake ~ bearer tie ~ bearer tie plate ~ bearer wind ~ bearing shelf ~ beater packing ~ beater pick ~ Beck, Henry Charles “Harry” ~ bed ~ Bedpan ~ beds ~ bedstead ~ bedstone ~ Beeching, Dr. Richard ~ behind ~ bell codes ~ bell tapper ~ Bellgrove accident ~ bellows ~ belly bound ~ belly rail ~ below rail level (BRL) ~ BELOW SB ~ below sleeper bottom (BSB) ~ BEMU ~ benching ~ bend ~ Bender unit ~ bendy dildo ~ benjamin ~ Benkler ~ Benkler joint ~ bent rail buffer stop ~ BEP ~ BEPT ~ BER ~ berm ~ Berne gauge ~ berth ~ berth offset ~ berth track ~ berth track circuit ~ berthed ~ berthing ~ Betts, Edward Ladds ~ between trains (BT) ~ beyond ~ BF ~ BFCB ~ BFK ~ BFO ~ BG ~ BGB ~ BGCL ~ BGL ~ BGV ~ BH ~ BHCC ~ BHX ~ BI ~ bi-di ~ bi-directional line ~ bi-directional signalling ~ bi-mode ~ bi-mode train ~ bi-parting doors ~ biased relay ~ Bible, the ~ BIC ~ BICC ~ BIFA ~ BIFS ~ BIFT ~ big bang ~ Big box ~ Big Ed ~ Big Four, the ~ BIKE 1 ~ BIKE 2 ~ BIL ~ billet deck ~ BIM ~ bimode ~ bimode train ~ BINAT ~ BINAT GO ~ Binliner ~ bins ~ BIR ~ bird mat ~ birdcage ~ BIS ~ biscuit ~ Bissell truck ~ BIT ~ bitumen spray ~ BJB ~ BJR ~ BK ~ BKF ~ BKS ~ BL ~ black ~ black diamonds ~ black gates ~ black holes ~ black rail ~ Black’s lock ~ blackwork ~ blade ~ blade angle ~ blank ended ~ blanket ~ blanket speed ~ blanket speed restriction ~ blanketing ~ blast furnace slag ~ blastpipe ~ bleed resistor pair ~ bleed resistors ~ blemished rail ~ blending ~ Blenkinsop rail ~ Blenkinsop, John ~ blind siding ~ blinder ~ blinker ~ BLK ~ BLNK REST ~ block ~ block bell ~ block bell codes ~ block bell signals ~ block code ~ block controls ~ block dropper ~ block end ~ BLOCK FLR ~ block indicator ~ block instrument ~ block joint ~ block marker ~ block marker board ~ block occupancy ~ block out ~ block override ~ block post ~ block regulations ~ block section ~ block section circuit ~ block shelf ~ block signal ~ block signalling ~ block switch ~ block to block ~ block to electric trains (form AE) ~ block train ~ blockade ~ blockage of the line ~ blocked ~ blocked line ~ blocked road man (BRM) ~ blocked to electric trains ~ blocked to electric traction (BTET) ~ blocking back ~ blocking points ~ Blockman ~ BLOCSID ~ Blondel formula ~ blood & custard ~ Bloss ~ Bloss spiral ~ Bloss transition ~ blow ~ blow down valve ~ blow off ~ blow through ~ blow up ~ blow-off ~ blow-off dewirement ~ blow-off mast ~ blower ~ blower feed pipes ~ blower rings ~ BLOX ~ BLQ ~ BLR ~ BLT ~ Blue Book, the ~ blue circle ~ blue item ~ blue sidings ~ blue square ~ blue star ~ blunt nose ~ BM ~ BMIS ~ BMS ~ BN ~ Bn NTkm ~ Bo ~ board ~ board and bubble ~ Board of Trade ~ boat ~ boat crossing ~ boat sampling ~ boat train ~ BoB ~ Bobby ~ body bolster ~ body side indicator light ~ bodysnatcher ~ BOEF ~ bogie ~ bogie bolster ~ bogie centre pivot ~ bogie centre pivot liner ~ bogie centres ~ bogie frame ~ bogie frame twist ~ bogie press ~ bogie rotation test ~ bogie rotational resistance ~ bogie stock ~ bogie wheelbase ~ boiler ~ boiler cladding ~ boiler stay ~ boiler ticket ~ boiler tubes ~ boiling frogs ~ bolster ~ bolsterless bogie ~ bolt ~ bolt hole ~ bolt retaining plate ~ bolted-base mast ~ BOM ~ Bombardier ~ Bombardier Transportation ~ bombtailed ~ bond ~ bond wire ~ bond wire hole ~ bonded joint ~ bondhole ~ bonding ~ bonding plan ~ bone ~ boning ~ boning rods ~ bonker ~ book wiring diagram ~ booked call ~ booked speed ~ booking hall ~ booking on point (BOP) ~ boom ~ boom lamps ~ boom lights ~ booster ~ booster overlap ~ booster transformer (BT) ~ booster transformer system (BT, BT system) ~ boosterless ~ BOOT ~ BOP ~ BoQ ~ BoQSoR ~ BOR ~ borate rods ~ bore ~ bored tunnel ~ Bos primigenius ~ Boschung plate ~ Bostwick gates ~ both ways lock ~ both ways signal ~ bottleneck ~ bottom ballast ~ bottom chord ~ bottom contact ~ bottom contact conductor rail ~ bottom endless haulage ~ bottom of ramp (BOR) ~ bottom rail ~ bottom roller ~ BOTTOMS ~ Bouch, Thomas ~ bouncy castle ~ boundary hopping ~ Bounds, Arthur F. ~ BOW ~ bow wire ~ Bowe report, the ~ bowling green ~ Bowmac ~ box ~ box chart ~ BOX CLOSED ~ box instructions ~ box of eggs ~ box plan ~ box section ~ box sleeper ~ box spanner ~ box time ~ box wagon ~ boxer ~ boxing off ~ boxing-in ~ boxing-in ballast ~ BP ~ BP&GVR ~ BPA ~ BPCA ~ BPIC ~ Bplan ~ BPM ~ BPOT ~ BPSIC ~ BR ~ BR rail ~ BR rail section ~ BR-ATP ~ BR1 ~ BR1 baseplate ~ BR1 bogie ~ BR2 baseplate ~ BR930 series ~ bracket arm ~ bracket chair ~ bracket foot assembly ~ bracket signal ~ brains ~ Brains Line ~ brake ~ brake actuator ~ brake application time ~ brake block ~ brake cock ~ brake compartment ~ brake continuity ~ brake continuity test ~ brake control unit (BCU) ~ brake cooling switch ~ brake cylinder ~ brake demand ~ brake distributor ~ brake distributor valve ~ brake force ~ brake gear ~ brake hanger ~ brake leakage test ~ brake pipe ~ brake pipe continuity ~ brake raft ~ brake retardation ~ brake retarding force ~ brake rigging ~ brake safety circuit ~ brake step ~ brake supply reservoir ~ brake timings ~ brake types ~ brake van ~ brake wire ~ braked ~ braked vehicle ~ BRAKES ~ braking curve ~ braking distance (BD) ~ braking steps ~ branch ~ branch line ~ brand mark ~ brander-shaped rail ~ branding ~ Brassey, Thomas ~ BRAT ~ BRAT test ~ Braunhaus, the ~ bravo ~ BRB ~ BRBS ~ BRC&W ~ BRCATS ~ BREAD ~ break ~ break its back ~ break of gauge ~ break the timbering ~ BREAKDOWN ~ breaker ~ Bream (ZEA, ZEB, ZEX) ~ breast ~ breather ~ breather length ~ breather switch ~ Brecknell Willis ~ Brecknell Willis high speed pantograph ~ BREEAM ~ BREL ~ BRENDA ~ BREV ~ brew ~ BRG ~ BRI ~ brick ~ bricked ~ bricking ~ Bricklayer’s Arms Junction accident ~ bridge ~ bridge adjustment switch ~ bridge arm ~ bridge assessment ~ bridge assessment file ~ bridge bash ~ bridge bolt ~ bridge cabin ~ bridge chair ~ bridge condition marking index (BCMI) ~ bridge deck ~ bridge deck floor ~ Bridge Examiner ~ Bridge Guard ~ BridgeGuard ~ bridge number ~ bridge pier ~ bridge plate ~ bridge rail ~ bridge strike ~ Bridge Strike Nominee level 1 (BSN1) ~ Bridge Strike Nominee level 2 (BSN2) ~ bridging pieces ~ bridle ~ bridleway bridge ~ bridleway crossing ~ Brill (YAA) ~ BRIM ~ BRIMS ~ Brinell marking ~ Brinelling ~ bringing (a train) under control ~ BRIS ~ British American Railway Services (BARS) ~ British Association for Immediate Care (BASICS) ~ British International Freight Association (BIFA) ~ British Railway Track (BRT) ~ British Railways (BR) ~ British Railways Board (BRB) ~ British Railways classification of maintenance facilities ~ British Railways Infrastructure Services (BRIS) ~ British Railways Property Board (BRPB) ~ British Railways Research (BRR) ~ British Reference System plate (BRS plate) ~ British Tramways Board (BTB) ~ British Transport Commission (BTC) ~ British Transport Police (BTP) ~ brittle overload ~ BRL ~ BRM ~ broad gauge track ~ broadly acceptable ~ Brogden joint ~ broken its back ~ broken rail ~ broken rail emergency vehicle (BREV) ~ broken rail ramp ~ bronze command ~ Brown’s rail scale ~ Brownes lock ~ BRPB ~ BRR ~ BRS ~ BRS Plate ~ BRSA ~ BRSLOG ~ BRT ~ Bruff ~ Bruff grader ~ bruising ~ Brunel ~ Brunel, Isambard Kingdom ~ Brunlees, Sir James ~ brush ~ BRUTE ~ BRV ~ BS ~ BS 110 ~ BS rail ~ BS rail section ~ BS rail (continued) ~ BS rail (further continued) ~ BS&D ~ BS&TE ~ BS113A ~ BS98 ~ BSA ~ BSB ~ BSC ~ BSE ~ BSI ~ BSK ~ BSN ~ BSN1 ~ BSN2 ~ BSO ~ BSOT ~ BSP ~ BSRIC ~ BSS ~ BST ~ BSWMS ~ BT ~ BT10 bogie ~ BTA ~ BTB ~ BTC ~ BTET ~ BTM ~ BTOG ~ BTP ~ BTPA ~ BTR ~ BTRC ~ BTS ~ BU ~ bubble car ~ bubble stick ~ Bucholz relay ~ Buck Eye ~ Buck Eye coupling ~ Buckeye ~ Buckeye coupling ~ buckle ~ budget lock ~ buff pages ~ buffer ~ buffer beam ~ buffer chock ~ buffer face ~ buffer locked ~ buffer locking ~ buffer overrun ~ buffer overrun risk zones ~ buffer overrun zone ~ buffer section ~ buffer stop ~ buffer stop lights ~ buffer zone ~ buffing area ~ buffing loads ~ buggy bar ~ built up and timbered ~ built up chair ~ built up crossing ~ Bulgarian wheels ~ bulk freight ~ bulk supply point (BSP) ~ bull ~ bull head ~ bull head check ~ bull head check rail ~ bull head check and running ~ bull head check and running rails ~ bull head check, flat bottom running ~ bull head check, flat bottom running rails ~ bull head crossing ~ bull head rail (BH) ~ bull head switch ~ bull head track ~ bullhead (BH) ~ bump ~ BUMP RPRTD ~ bump stop clearance ~ BumpBox ~ bund ~ BUO ~ Bureau d’Enquêtes sur les Accidents de Transport Terrestre (BEA-TT) ~ Burma road ~ burr lipping ~ burrowing junction ~ bus line ~ bus line earth leakage relay ~ bus section (BS) ~ bus telephone ~ busbar ~ bush ~ Bushey accident ~ bushing ~ Business Critical Configuration Management ~ Business Critical Rules (BCR) ~ Business Critical Rules Programme (BCRP) ~ Business Critical Standards (BCS) ~ busline ~ bustitution ~ Butler protocol ~ button stick ~ buttress ~ buzzer codes ~ BV ~ BVHS ~ BVI ~ BVs ~ BVS ~ BW ~ BWA ~ BWH&AR ~ BX ~ BYM ~ BZPC

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C

C board ~ C jumper ~ C stock ~ C switch ~ C-APT ~ C-change ~ C-DAS ~ C-OSS ~ C-type bridge ~ C/1/x ~ C/E ~ C&D ~ C&I ~ C&MLR ~ C&OJR ~ C&P ~ C&W ~ C&W Inspector ~ C&WJR ~ C1 ~ C1A ~ C1 appendix A ~ c2c ~ C3 ~ C3R ~ C4 ~ CA ~ cab ~ cab display unit (CDU) ~ cab pass ~ cab ride ~ cab riding ~ Cab Secure Radio (CSR) ~ Cab Secure Radio channel sign (CSR channel sign) ~ cab signal ~ cab signalling ~ CAB SYS ~ CABBAGE ~ cable ~ cable bridge ~ cable core plan ~ CABLE CUT ~ cable post run ~ cable route ~ cable route plan ~ cable route survey ~ cable stile ~ cable train ~ cable troughs ~ CAC ~ Cadweld ~ CAF ~ CAFR ~ CAG ~ CAGR ~ CAHA ~ CAI ~ CAIMAN ~ CAIS ~ CAL ~ calculated extension ~ Caledonian Sleeper ~ call-by ~ call-on calling ~ calling-on light ~ calling-on route ~ calling-on signal ~ CAM ~ camber ~ Camlin Rail ~ Camlok ~ CAMPS ~ CAMS ~ camshaft ~ camshaft control ~ Can ~ CAN ~ CANCEL REQ ~ cancelling indicator ~ Candy ~ canister ~ cannon box ~ Cannon Street accident ~ cans ~ cant (C, E) ~ cant constant ~ cant deficiency (D) ~ cant deficiency gradient ~ cant excess ~ cant gradient (CG) ~ cant hook ~ cant limiting values ~ cant mark cant nails ~ cant plates ~ cant rail ~ cantrail ~ cant stick ~ cant transition ~ canted track ~ cantilever ~ cantlockers ~ CAP ~ Capacity Plus ~ CAPE ~ Cape gauge ~ CAPEX ~ capital project ~ Capitalstar ~ CAPP ~ capping stone ~ CAPRI ~ CAPS ~ car ~ CAR ~ car count-up markers ~ car doors ~ car stop ~ car stop marker ~ carbody ~ carbons ~ CARCI ~ CARD ~ Card Process, the ~ Cardan shaft ~ carding ~ CARE ~ Care and Maintenance ~ cargo transport unit (CTU) ~ CargoSprinter ~ CARINO ~ CARKND ~ CARMD ~ carnet ~ carnet ticket ~ Carp (ZBA) ~ carriage ~ Carriage and Wagon (C&W) ~ Carriage and Wagon Inspector (C&W Inspector) ~ carriage dock ~ carriage key ~ carriage line (CL) ~ carriage maintenance depot (CMD) ~ carriage siding (CS) ~ carriage washer (CW) ~ carriage washing machine (CWM) ~ carrier drain ~ carrier wagon ~ carrier wire ~ carrier wire neutral section (CWNS) ~ CARRS ~ CART ~ cartic ~ cartic four ~ cartridge heaters ~ CAS ~ CAS-T ~ cascade ~ cascaded cut section ~ CaSL ~ CASR ~ cast AMS crossing ~ cast austenitic manganese steel crossing ~ cast centre block common crossing ~ cast centre block crossing (CCBC) ~ cast centre block obtuse crossing ~ cast conductor rail ramp ~ cast crossing ~ cast iron (CI) ~ cast manganese crossing ~ cast monoblock crossing ~ cast vee ~ cast vee common crossing ~ Castell key ~ castellated beam ~ castellated nut ~ castle ~ Castlecary accident ~ CAT ~ cat ~ CAT 1A, 1, 2, 3, 4, 5, 6 ~ cat’s eyes ~ catch handle ~ catch handle locking ~ catch pit (CP) ~ catch point (CP) ~ catch wall ~ catchment area ~ catchpit ~ CATE ~ category 1A ~ category A, B, C, D SPAD ~ category of check ~ category of platform ~ category x ~ catenary ~ catenary wire ~ Caterham accident ~ Caterham controls ~ Caterham locking ~ CATERING ~ Catfish (ZEV) ~ cationic spray ~ CATOP ~ CATT ~ cattle ~ cattle class ~ cattle creep ~ cattle dock ~ cattle guard ~ cattle-cum-trespass guard ~ caud pie ~ causal factor ~ caution ~ caution aspect ~ caution notice ~ CAWS ~ CB ~ CB-OD ~ CB-SHS ~ CBA ~ CBCT ~ CBI ~ CBL ~ CBM ~ CBR ~ CBTC ~ CC ~ CCA ~ CCB ~ CCBC ~ CCE ~ CCF ~ CCG ~ CCI ~ CCIL ~ CCIR ~ CCITT ~ CCJP ~ CCLDB ~ CCMS ~ CCQ ~ CCR ~ CCRM ~ CCRT ~ CCS ~ CCSC ~ CCTV ~ CCTV level crossing ~ CCU ~ CCW ~ CCZ ~ CD ~ CD / RA ~ CD / RA indicator ~ CD&D ~ CDDS ~ CDG ~ CDI ~ CDL ~ CDM ~ CDMA ~ CDMS ~ CDP ~ CDR ~ CDRL ~ CDS ~ CDU ~ CE ~ CE handbook ~ CEA ~ CEAIS ~ CEAP ~ CEB ~ CEBCOS ~ CEC ~ CECA ~ CECASE ~ CED ~ CEDAC ~ CEDG ~ CEEQUAL ~ CEFA ~ CEGMT ~ CEGS ~ CEH ~ ceiling speed ~ CELTE ~ CEM ~ CEMFAW ~ CEMFAW Regulations ~ CEMM ~ CEMP ~ CEN ~ CEN54E1A1 ~ CEN56 vertical ~ CEN56 vertical S&C ~ CEN56E1 ~ CEN60E1 ~ CEN60E1A1 ~ CEN60E2 ~ CEN60E2A1 ~ CENELEC ~ central battery (CB) ~ central door locking (CDL) ~ central emergency power supply (CEPS) ~ central interlocking processor (CIP) ~ Central Trains (CT) ~ centre bound ~ Centre for Protection of National Infrastructure (CPNI) ~ centre line design ~ centre line low rail ~ centre line measurement ~ centre line of structure gauge ~ centre opening doors ~ centre pivot ~ centre pivot pin ~ centre pivot liners ~ centre siding ~ centre throw ~ Centro ~ CEPS ~ CER ~ CERD ~ CERT ~ certificate of conformance ~ certificate of readiness (CoR) ~ CESG ~ CESM ~ CESMM ~ cess ~ cess drain ~ cess heave ~ cess leg ~ cess path ~ cess rail ~ cess strip ~ CET ~ CET apron ~ CFCB ~ CFD ~ CFF ~ CFOR ~ CG ~ CGIS ~ CGLR ~ CH ~ ch. ~ chain ~ chainage ~ chaining out ~ Chainman ~ CHAIR ~ chair ~ chair gall ~ chair liner ~ Chair Lock ~ chair pad ~ chair shuffle ~ Chairlock ~ chairscrew ~ chaldron ~ CHALET ~ Chambers, Austin ~ chamfered switch ~ Chancery Lane accident ~ change of gauge ~ change of section ~ changes of section ~ change point (CP) ~ channel drain ~ channel rails ~ channel rodding ~ Channel Tunnel (CT) ~ Channel Tunnel Bi–National Emergency Plan (BINAT) ~ Channel Tunnel Rail Link (CTRL) ~ Channel Tunnel Safety Authority (CTSA) ~ CHAPS ~ Chargehand ~ Chargeman ~ charlie ~ charter ~ charter train ~ Chartered Engineer ~ Chartered Institute of Logistics and Transport (CILT) ~ CHAS ~ Chasing signals ~ Cheadle Junction accident ~ cheap and cheerful CWR ~ check baseplate ~ check block ~ check category ~ check chair ~ check cover ~ check locking ~ check lump ~ check rail ~ check rail gap ~ check rail gauge ~ check rail lubricator ~ check Signaller ~ checked ~ checked curve ~ checking ~ cheese weights ~ Chef de Train ~ cherries ~ cherry picker ~ chicane ~ chicken ladder ~ Chief Inspector ~ Chief Mechanical Engineer speed ~ Chief Permanent Way Inspector ~ Chief Works Inspector ~ CHIK ~ Chiltern Railways ~ chimney ~ CHIP ~ chip van ~ chipping ~ chipping bin ~ chippings ~ chogblock ~ choke ~ choked ballast ~ chopper ~ chopper control ~ chopstick ~ chord ~ chord length ~ chord line ~ chromaticity ~ chrome rail ~ CHS ~ CHU ~ Chub (ZCX) ~ Chug bolt ~ CHUNL LOCO ~ chute wagon ~ CI ~ CIC ~ CIDS ~ CIE ~ CIÉ ~ CIF ~ cill beam ~ CILT ~ CIM ~ CIMAH ~ CIMU ~ cinderella ~ CIP ~ CIPCE ~ CIPP ~ CIPR ~ CIRAS ~ circle time ~ circuit ~ circuit breaker (CB) ~ circuit controller ~ circuit telephones ~ circular curve ~ circular turnout ~ CIRIA ~ CIS ~ CISPR ~ CIT ~ Citrusol Rail ~ CIU ~ Civil Engineer (CE) ~ Civil Engineering Committee (CEC) ~ Civil Engineering Conference (CEC) ~ Civil Engineering Contractor’s Association (CECA) ~ civil engineering handbook ~ Civil Structures Asset Management System (CSAMS) ~ Civils Design Group (CDG) ~ Civils, the ~ CJB ~ CJC ~ CK ~ CK&PR ~ CL ~ CL:AIRE ~ clack valve ~ clad arch ~ clag ~ Claims Allocation and Handling Agreement (CAHA) ~ Clam (ZCV) ~ clamp ~ clamp lock ~ clamp plate ~ clamped joint ~ Clamplock ~ Clamplock heater ~ Clamplock point machine ~ Clamplock points ~ Clamplock switch ~ Clapham accident ~ Clarke, Edwin ~ CLARS ~ CLASP ~ clasp brake ~ class ~ class A train protection system ~ class B train protection system ~ class of defect ~ class of line ~ class of rail defect ~ class of sleeper ~ class of supply ~ class of tank wagon ~ class of train ~ classic compatible ~ classification society ~ Clawlock ~ clay balls ~ clay dig (CD) ~ clay dig and drain (CD&D) ~ Clayton Tunnel accident ~ CLC ~ clean copy ~ clean end ~ clear ~ clear aspect ~ clear back ~ clear weather conditions ~ clearance ~ clearance bar ~ clearance point (CP) ~ cleared ~ clearing point ~ ClearRoute ~ clerestory ~ clerestory roof ~ clevis coupler ~ CLG ~ CLI ~ client requirements document (CRD) ~ climb the rail ~ climbing the rail ~ clip ~ clip deflection ~ clipped and padlocked (C&P) ~ clipped and scotched ~ clipped out of use ~ clipping down ~ clipping up ~ clockface ~ clockface timetable ~ Clockwork Orange, the ~ clogging-on ~ clogging-on gauge ~ close call ~ close doors (CD) ~ close doors indicator (CDI) ~ close tolerance fishplate ~ close viewing sector (CVS) ~ closed block ~ closed line ~ closed switch ~ closing up signal ~ closing weld ~ closure list ~ closure notice ~ closure panel ~ closure procedure ~ closure rail ~ clot ~ clothoid spiral ~ CLR ~ CLRL ~ CLS ~ CLTO ~ club coach ~ Clubman ~ CM&DPR ~ CMD ~ CME ~ CMEO ~ CMI ~ CMIR ~ CML ~ CMS ~ CNIITEI ~ CNM ~ CNNCTN TFC ~ Co ~ CO ~ co-acting signal (CA) ~ co-operative shortening of an ERTMS movement authority ~ COA ~ coach ~ coach screw ~ coaching stock ~ coachscrew ~ coal drop ~ Coalfish (MHA) ~ coaling line ~ coaling road ~ coast ~ coasting ~ coasting board ~ CoBA ~ CoBALT ~ cock ~ Cockle ~ Cockroach ~ CoCoSig TSI ~ CoCP ~ Cod (ZAV) ~ code ~ code of practice (COP) ~ code red ~ code trip valve ~ CoE ~ coefficient of adhesion (µ) ~ coefficient of static friction (µ) ~ COI ~ coil ~ COIM ~ Coimisiún Sábháilteachta Iarnróid ~ COL ~ Colas Rail ~ COLD ~ cold expanding of bolt holes ~ cold expansion of bolt holes (CX) ~ cold rolling ~ cold standby (CS) ~ collar ~ collar joint ~ collaring ~ collective risk ~ collector drain ~ collector shoe ~ Collet mechanical ballast packer ~ colliery railway ~ Cologne eggs ~ colour light distant signal ~ colour light signal ~ colour light signals ~ colour light signalling ~ colouring convention ~ Colwich accident ~ Colwich control ~ COM CORD ~ COMAH ~ comb ~ combination lever ~ combination rail ~ combination valve ~ COMBINE ~ combined IDC/IDR ~ combined interdisciplinary design check / interdisciplinary design review ~ combined machine ~ combined point machine ~ combined power-brake controller ~ combined reading distance (CRD) ~ combined traction and brake controller (CTBC) ~ comeback possession ~ comeback shift ~ command telegram ~ commencement ~ commencement board ~ commencement indicator ~ commissioning ~ common carrier ~ common chair ~ common crossing ~ common crossing point rail ~ common crossing splice rail ~ common crossing vee ~ common crossing, parts of ~ common interface file (CIF) ~ common interface file operating characteristics code ~ common rail (CR) ~ common rail bonding ~ common rail track circuit ~ Common Safety Method (CSM) ~ Common Safety Method Assessment Body (CSM AsBo) ~ Common Safety Method for Risk Evaluation and Assessment (CSM-RA) ~ common shunt group ~ commonwealth bogie ~ communication cord ~ communications based train control (CBTC) ~ Community Rail ~ Community Rail line ~ Community Rail Partnership (CRP) ~ Community Rail service ~ commutator ~ commuter ~ commuter line ~ company equipotential grid system ~ Company Standards ~ comparative gauging ~ compartment ~ compartment coach ~ compartment stock ~ COMPASS ~ compensated gradient ~ compensating bar ~ compensator ~ Competent Independent Person (CIP) ~ Competent Person ~ complete renewal ~ complete resleeper ~ complete resleepering ~ complex points failure ~ complex projects procedure (CPP) ~ compliance date ~ composite ~ composite coach ~ composite adjustment switch ~ composite deck ~ composite insulator ~ composite weld ~ composite wheel ~ composite yards ~ compound ~ compound catenary ~ compound crossing ~ compound curve ~ compound rail ~ comprehensive approach locking (CAL) ~ compromise fixed buffer stop ~ compulsory purchase order (CPO) ~ computer based interlocking (CBI) ~ computer reservation system (CRS) codes ~ con rail ~ conrail ~ conarch ~ concast ~ concast rail ~ concave platform ~ concave vertical curve ~ concentrator ~ concept train plan (CTP) ~ concession ~ concession agreement ~ concession time ~ conciliation grades ~ conciliation staff ~ concourse ~ concourse level ~ concrete bearer ~ concrete cable trough ~ concrete sleeper ~ concrete sleepered track ~ concrete switch bearer ~ concrete train ~ concreted track COND ~ cond. ~ condition of track (COT) ~ condition of track temporary speed restriction (COT TSR) ~ condition of track speed (COT speed, COTS) ~ conditional double reds (CDR) ~ conditional emergency stop (CES) ~ conditional locking ~ conditioning ~ conditioning the rail head ~ conditions of carriage ~ Conductor ~ conductor ~ conductor beam ~ conductor driver ~ conductor icing ~ conductor rail ~ conductor rail anchor ~ conductor rail anchor struts ~ conductor rail boarding ~ conductor rail equipment (CRE) ~ conductor rail gap ~ conductor rail gauge ~ conductor rail icing ~ conductor rail insulator ~ conductor rail permit (CRP) ~ conductor rail ramp ~ conductor rail shield ~ conductor rail test lamp set ~ conductor rail tester ~ conductor rail testing device ~ cone packings ~ cone penetration test (CPT) ~ cone penetrometer testing (CPT) ~ confidence limits ~ Confidential Incident Reporting and Analysis System (CIRAS) ~ configurated rail pad ~ confined space ~ confirmed period possession plan (CPPP) ~ confirmed rear end (CRE) ~ confirmed safe rear end (CSRE) ~ CONFLICT ~ conflicting locking ~ conflicting move ~ conflicting movement ~ conflicting port ~ conflicting signal ~ confliction ~ Conformance Body ~ Conformance Certification Body (CCB) ~ Conger (YVQ, YXA) ~ congested infrastructure ~ CONGESTION ~ coning ~ Connect project ~ Connect Radio ~ connected facility ~ connecting rod ~ connection agreement (CA) ~ connections ~ Connex ~ Connex South Central ~ Connex South Eastern ~ CONOPS ~ consist ~ console ~ consolidate ~ consolidation ~ conspicuity ~ constrained curving ~ construction depth ~ construction earth ~ Construction Products Regulation (CPR) ~ contact angle ~ contact face ~ contact force ~ contact gauging ~ contact ramp ~ contact strip ~ contact system ~ contact wire (CW) ~ contact wire icing ~ contact wire splice (CWS) ~ contact wire uplift ~ contactor ~ container ~ container carrier ~ container flats ~ container vehicles ~ container wagons ~ containment ~ containment capacity ~ contaminated ballast ~ contenary ~ continental notation ~ continuity bond ~ continuity brake test ~ continuous action tamper (CAT) ~ continuous automatic warning system (CAWS) ~ continuous brake ~ continuous check ~ continuous checking ~ continuous check rail ~ continuous place of safety (CPOS) ~ continuous rail ~ continuous resleepering ~ continuous route signage ~ continuous route signing (CRS) ~ continuous running rail (CRR) ~ continuous welded rail (CWR) ~ continuous welded rail train (CWR train) ~ contour railway ~ contra-flexure ~ contra-flexure turnout ~ contra-tilting pantograph ~ contract of sponsorship ~ contract requirements technical (CRT) ~ contractor ~ contractor’s assurance case (CAC) ~ contractor’s crossing ~ Contractor’s Engineering Manager (CEM) ~ contractor’s points ~ Contractor’s Responsible Engineer (Construction) (CRE Construction) ~ Contractor’s Responsible Engineer (CRE) ~ Contractor’s Responsible Engineer (Design) (CRE Design) ~ contractor’s safety case (CSC) ~ contrast ~ contributory factor ~ control ~ control area ~ control centre ~ control centre controller ~ control centre incident log (CCIL) ~ Control Centre of the Future (CCF) ~ control device ~ control interpreter ~ control key ~ control office ~ control pedestal ~ control period (CP) ~ control point ~ control reservoir ~ control speed area ~ control speed permission ~ control system gateway (CSG) ~ control table ~ control tower ~ controlled area ~ controlled barriers – obstacle detectors (CB-OD) ~ controlled crossing ~ controlled document ~ controlled emission toilet (CET) ~ controlled evacuation ~ controlled level crossing ~ controlled signal ~ controlled test stop ~ controller ~ Controller of Site Safety (COSS) ~ controlling signal box ~ conventional compatible (CC) ~ conventional interoperability ~ conventional rail (CR) ~ conventional route ~ conventional signalling ~ conventional signalling system ~ conventional train ~ converging lines ~ converging tracks ~ converse locking ~ conversion ~ converter ~ converting ~ convex platform ~ convex vertical curve ~ convoy ~ convoy carriage ~ convsig ~ Cooke - Wheatstone ~ Cooke, William Fothergill ~ cooling switch ~ COP ~ CoPA ~ coper ~ coping ~ coping stone ~ CoR ~ Coradia ~ Córas Iompair Éireann (CIÉ) ~ cordon cap ~ core planner 1 ~ core planner skills 1 ~ core planner 1 ~ core planner skills 2 ~ core possession ~ CORECT ~ corf ~ corf way ~ corner casting ~ corner pillar ~ Coronet joint ~ corporate memory ~ CORPUS ~ correct side door enable (CSDE) ~ correlation ~ correlation survey ~ correlation waiver ~ correspondence ~ corridor ~ corridor coach ~ corrosion trap ~ corrugation ~ CoS ~ COSHH ~ COSS ~ COSS brief ~ COSS briefing ~ COSS form ~ COSS handbook ~ COSS pack ~ COSS record of arrangements and briefing form (COSS form) ~ COSS(P) ~ COT ~ COT speed ~ COT TSR ~ COTIF ~ COTS ~ cotter ~ cotter pin ~ cotton bobbin ~ COTTSR ORR ~ COU ~ countdown markers ~ counter conditional locking ~ counterbalanced incline ~ counterfort ~ counting head ~ country ~ country end (CE) ~ country side (CS) ~ coupled ~ coupled in multiple ~ coupled in tandem ~ coupled up ~ COUPLER ~ coupler ~ coupler release chain ~ coupler release lever ~ coupling ~ coupling hooks ~ coupling rod ~ coupling up ~ cover ~ cover and cut ~ cover check ~ covered Stumec ~ covered track ~ covered way ~ cow ~ cowcatcher ~ CoWD ~ Cowden accident ~ Cowper, Edward Alfred ~ CP ~ CPA ~ CPB ~ CPC ~ CPD ~ CPE ~ CPIC ~ CPMT ~ CPNI ~ CPO ~ CPOS ~ CPP ~ CPPP ~ CPR ~ CPST ~ CPT ~ CPTED ~ CPU ~ CPx ~ CR ~ CR ENE TSI ~ CR LOC & PAS TSI ~ CR WAG TSI ~ CR-E ~ CR-T ~ CRA ~ Crab ~ Crab (ZBV, ZCV) ~ cracker ~ Cramer ~ Cramer database ~ crane beam ~ Crane Controller (CC) ~ Crane Controller tandem lift ~ crane prefixes ~ crane rail ~ Crane Slinger ~ crane suffixes ~ crank ~ crank handle ~ crank pin ~ cranked fishplate ~ crankex ~ crash pulse ~ crashworthiness ~ Crayfish ~ Crayonista ~ CRD ~ CRE ~ creep ~ creep control ~ creep monitor ~ creep resistance ~ creep signal ~ creesing ~ Cresswell’s compound ~ Crest ~ crest drain ~ CREW ~ crew call system ~ CREW USED ~ Crewe Heritage Centre ~ crewling ~ CRG ~ CRIB ~ crib ~ CRID ~ CRIES ~ crimp ended steel sleeper ~ cripple ~ cripple road ~ cripple siding ~ crippled rail ~ crippled switch ~ crippling ~ critical pump site ~ critical rail temperature (CRT) ~ critical rail temperature (watchman) (CRT(W)) ~ CRN ~ CRO ~ Cromptons ~ crop and weld ~ cropped and welded ~ cropped and welded rail ~ cropping ~ cross bond ~ cross contact bar ~ crossed contact bar ~ cross dock ~ cross drain ~ cross dropper ~ cross fall ~ cross girders ~ cross level ~ cross members ~ cross packing ~ cross passage (CP) ~ cross passage door (CPD) ~ cross platform ~ cross sleepered track ~ cross span wire ~ cross-level ~ cross-read ~ cross-span wire ~ CrossCountry ~ crossfall ~ crossing (Xing) ~ crossing angle ~ Crossing Attendant ~ crossing bearer ~ crossing box ~ crossing chair ~ crossing clear (CC) ~ crossing contact arrangement ~ crossing control key ~ crossing heel ~ Crossing Keeper ~ crossing legs ~ crossing length ~ crossing loop ~ crossing nose (XN) ~ crossing nose to intersection point dimension ~ crossing operator ~ crossing order ~ crossing order system ~ crossing point rail ~ crossing speed ~ crossing surface ~ crossing telephone ~ crossing timber ~ crossing time ~ crossing vee ~ crosslevel ~ crosslevel error ~ crosslevel gauge ~ crossover (X over) ~ crossover route ~ crossover speed ~ crossover tunnel ~ crossover-based double junction ~ Crossrail ~ crow ~ Crowley link crown ~ crownsheet ~ CROWS ~ CRP ~ CRR ~ CRS ~ CRT ~ CRT register ~ CRT(W) ~ CRUCC ~ crucible ~ cruciform pad ~ Crum. ~ crumple zones ~ crush laden ~ crush load ~ crushed rock fines ~ crushing ~ CS ~ CS&TE ~ CS3 ~ CSA ~ CSAC ~ CSAMS ~ CSC ~ CSD ~ CSDE ~ CSE ~ CSG ~ CSK ~ CSM ~ CSM AsBo ~ CSM RA ~ CSMA ~ CSP ~ CSR ~ CSR Channel Sign ~ CSRE ~ CSRIC ~ CSS ~ CT ~ CT ~ CT7 number ~ CT7 sign ~ CTA ~ CTBC ~ CTC ~ CTCC ~ CTCSS ~ CTD ~ CTDS ~ CTF ~ CTFS ~ CTI ~ CTNC ~ CTP ~ CTR1 ~ CTR2 ~ CTR3 ~ CTRL ~ CTRL DS ~ CTRS ~ CTRU ~ CTS ~ CTSA ~ CTTG ~ CTU ~ cubic parabola ~ CUCKOO ~ CUI ~ Cullen Report, the ~ culvert ~ culverted ~ culverted section ~ CUP ~ cup and pin insulator ~ cup spring ~ Curr, John ~ Curr’s plate rail ~ CURRANT ~ current arrangements ~ current collection shoe ~ current equalising jumper ~ current rail ~ current rail gap ~ current rail gap indicator ~ current rail gap repeater ~ current rail indicator box (CRIB) ~ current rail indicator device (CRID) ~ current rail section ~ curtain-sided container ~ curvature ~ curve ~ curve of adjustment ~ curve realignment ~ curve to curve transition ~ curved planed ~ curved planed switch ~ curved track ~ curving ~ curving rules ~ customer emergency plunger ~ customer host ~ customer information system (CIS) ~ customer service controllers ~ customer service representative (CSR) ~ cut ~ cut and cover ~ Cut and shut ~ cut and shut ramp ~ cut down dozer ~ cut section ~ cut tyre ~ cut-in insulation ~ cut-off ~ cut-off contact ~ cut-out speed indicators ~ cut-out speed signs ~ cut-outs ~ cutter bar ~ cutter bar hole ~ cutting ~ cutting shield ~ cutting slip ~ cutwater ~ CV ~ CV&HR ~ CVM ~ CVs ~ CVS ~ CVT ~ CVWM ~ CW ~ CWACC ~ CWDM ~ CWM ~ CWNS ~ CWR ~ CWR train ~ CWS ~ CX ~ CX level crossing ~ Cybernetix IVOIRE III ~ cycle times ~ cyclic interlock ~ cyclic maintenance ~ cyclic sidewear ~ cyclic task ~ cyclic top ~ cyclic twist ~ cyclical access ~ cylinder ~ cylinder drain cocks ~ CYRUS

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D ~ D stock ~ D-type bridge ~ D&A ~ D&A screening ~ D&A testing ~ D&AJR ~ D&B ~ D&BJR ~ D&C ~ D&C Engineer ~ D&D ~ D&DA ~ D&DR ~ D&I ~ D&IA ~ D&OT ~ D2C ~ D4RE ~ DA ~ DAA ~ DAB ~ dabbing in ~ DAC ~ Dace (ZCV) ~ DAF ~ DAFNI ~ DAG ~ dagger ~ daggered speed ~ daggering daily exam ~ DAISIE ~ DAL ~ Dalek ~ damped arm ~ damper ~ damper pad ~ damper pot ~ damping resistance ~ dandy cart ~ danger ~ dangerous goods ~ DAOL ~ DAP ~ DAPF ~ Daphne ~ DAPP ~ DAR ~ Dargan, William ~ Dark Tower, the ~ DART ~ Darth Vader ~ Darwin ~ DAS ~ DASD ~ DASS 2 ~ DaSTS ~ Data & Analytics Facility for National Infrastructure (DAFNI) ~ data available (DA) ~ data entry ~ data link module (DLM) ~ data recorder ~ data telegram ~ Datatrak ~ datum marker ~ datum marks ~ datum plate ~ datum plate survey ~ datum rail ~ david ~ Davis formula ~ days ~ DB ~ DB Cargo ~ DB Schenker Rail (UK) Ltd. (DBS) ~ DBE ~ DBF ~ DBFO ~ DBFT ~ DBHP ~ DBOM ~ DBS ~ DBSO ~ DBTSO ~ DBVIC ~ DC ~ DC electrification system ~ DC electrified line ~ DC immune ~ DC isolation ~ DC link ~ DC rail ~ DC resistance control ~ DC track circuit ~ DC train ~ DCA ~ DCD ~ DCDS ~ DCE ~ DCI ~ DCIO ~ DCK ~ DCLDS ~ DCM ~ DCO ~ DCOMD ~ DCP ~ DCR ~ DCRDF ~ DCRM ~ DCS ~ DCU ~ DCVI ~ DCVR ~ DD ~ DD&I ~ DDA ~ DDF ~ DDI ~ DDP ~ DDR ~ DE ~ de-energisation ~ de-energised ~ de-icing bath ~ de-icing cars ~ de-icing train ~ de-vegging ~ dead ~ dead load ~ dead locking ~ dead man’s handle ~ dead reckoning ~ dead-centre ~ dead-space drain valve ~ deadman ~ DEBO ~ DEBRIS ~ DECA ~ Decapod ~ decarburised layer ~ DECC ~ deceleration distance (DD) ~ decision point ~ deck ~ deck plates ~ DED ~ DEDA ~ dedication notice ~ DEDIMUS ~ deemed minutes ~ deep level tube ~ deep skirted fishplate ~ deep tube line ~ DEF ~ defect ~ defective on-train equipment ~ defective on-train equipment plan (DOTE plan) ~ defective rail ~ defective sleeper ~ defective weld ~ defensive driving ~ DEFI ~ deficiency ~ defining structures ~ deflection ~ DEFRA ~ DEG Signal ~ degraded ~ degraded mode ~ degraded mode working (DMW) ~ degraded mode working system (DMWS ) ~ degree of curvature ~ DEL ~ Delachaux weld ~ delay attribution ~ delay attribution code ~ delay minute ~ delay minutes ~ delay recording point (DRP) ~ delayed ettringite formation (DEF) ~ delayed yellow ~ delayed yellow aspect ~ delivery plan ~ Delivery Unit (DU) ~ Delkor egg ~ Dellner coupling ~ delta ~ delta junction ~ delta suspension ~ DeltaRail ~ Deltics ~ DEM ~ demand ~ demand forecast ~ demand loop ~ Demco ~ demic ~ demountable machine ~ DEMU ~ DEP ~ Department for Regional Development in Northern Ireland (DRDNI) ~ Department for Transport (DfT) ~ Departmental Engineering Manager (DEM) departmental vehicles ~ departure ~ departure board ~ departure line ~ depot ~ DEPOT ~ depot access agreement ~ depot access contract ~ depot control system ~ depot current section ~ depot facility operator (DFO) ~ depot protection master ~ depot protection system (DPS) ~ depot shed shore supply ~ depot trip switch ~ depression bar ~ depth of cut ~ dequadrification ~ derail ~ derailed ~ derailer ~ derailment ~ derailment containment ~ derailment containment kerb ~ derailment quotient ~ derailment resistance ~ Derby ~ Derby lightweight ~ Derby Research ~ derogation ~ DERWENT ~ design alignment ~ design chainage ~ design level ~ design lifts ~ design log ~ design rail level ~ Design Service Framework (DSF) ~ design sleeper bottom ~ design slues ~ design speed ~ design tamping and lining ~ designated earthing point (DEP) ~ Designated Person (DP) ~ Designated Project Engineer (DPE) ~ Designer’s Engineering Manager (DEM) ~ desire line ~ Desiro ~ destress ~ destressing ~ detailed design ~ detailed examination ~ detailed examination of structures ~ detailed feasibility ~ detailed feasibility study ~ detailed planning meeting (DPM) ~ detailed Route requirements document (DRRD) ~ detected ~ detection ~ detection contacts ~ detection equipment ~ detection loop ~ detection relay ~ detector rod ~ Deterflex ~ detonator ~ detonator placer ~ detonator protection ~ DETP ~ DETR ~ detrain ~ detraining ~ dets ~ DEV ~ Development Consent Order (DCO) ~ development vehicle (DV) ~ deviation ~ devolution ~ Devon and Cornwall Railways (DCR) ~ dewirement ~ DF ~ DFA ~ DFF 14 ~ DFF 300 ~ DFL ~ DFO ~ DFR ~ DFT ~ DfT ~ DG ~ DGI ~ DGI INCDT ~ DGL ~ DGN ~ DH ~ DHMU ~ DI ~ DIA ~ DIADS ~ DIAG ERROR ~ diagonal ~ diagonal wheel unloading ~ diagram ~ diamond ~ diamond crossing ~ diamond time ~ diamond with double slip ~ diamond with single slip ~ DIBMOF ~ DIC ~ Didcot control ~ Diddy Vest ~ diesel and electric locomotive notation ~ diesel electric ~ diesel electric locomotive ~ diesel electric multiple unit (DEMU) ~ diesel electric traction ~ diesel hauling ~ diesel hydraulic multiple unit (DHMU) ~ diesel locomotive ~ diesel maintenance depot (DMD) ~ diesel mechanical multiple unit (DMMU) ~ diesel multiple unit (DMU) ~ diesel traction ~ DIESL LOCO ~ differences ~ differential enhanced permissible speed restriction ~ differential enhanced permissible speed sign ~ differential EPS sign ~ differential permissible speed ~ differential permissible speed restriction ~ differential speed ~ differential speed restriction (DSR) ~ differential warning indicator ~ digital railway (DR) ~ dike ~ DIME ~ dimpled pad ~ ding ding and away ~ DIPD ~ dipped joint ~ DIR ~ direct drive ~ direct drive RRV ~ direct fastened deck ~ direct fastened track ~ direct fastening ~ direct lever locking ~ direct opposing locking ~ Direct Rail Services (DRS) ~ direct rail wheel brake ~ direct reverse ~ direct reverse curve ~ direct track locking ~ direction lever ~ Directly Operated Railways (DOR) ~ director’s saloon ~ DIRFT ~ dirty end ~ DIS ~ dis. box ~ Disab ~ DISAB 1 ~ DISAB 2 ~ DISAC ~ Disastro ~ disc brake ~ disc saw ~ disc signal ~ discharge of traction current ~ discipline ~ Disco Lights ~ disconnected signal ~ disconnection ~ disconnection box ~ disconnection panel ~ discrete position of safety (DPOS) ~ DISCU ~ dish ~ DISI ~ DISORDER ~ DISPATCH ~ dispatch corridor ~ displaced asset ~ displacement ~ displacement and acceleration recorder (DAR) ~ disproved wrong side failure ~ disregard, a ~ distance block ~ distance point ~ distance signal ~ distance-to-go radio (DTG-R) ~ distant board ~ distant Lookout ~ distant signal ~ Distantman ~ distortion ~ Distribution ~ distribution interface transformer (DIT) ~ distribution interface transformer assembly (DITA) ~ distribution network operator (DNO) ~ distributor ~ District ~ district electric depot (DED) ~ disturbed ~ DIT ~ DITA ~ Ditton Junction accident ~ diverging junction ~ diverging line ~ diverging route ~ diverging track ~ diverse routing ~ diversely routed system ~ DIVERSION ~ diversion ~ diversionary route ~ diversity ~ diversity impact assessment (DIA) ~ DIVERT REQ ~ diveunder ~ divided ~ divisible train staff ~ Division ~ Divisional Civil Engineer (DCE) ~ DIVRSN/SLW ~ DJR ~ DK ~ DKE ~ DKS ~ DLA ~ DLM ~ DLR ~ DLS ~ DLV ~ DM ~ DMB ~ DMBC ~ DMBF ~ DMBS ~ DMBSO ~ DMC ~ DMD ~ DMDS ~ DMF ~ DMI ~ DML ~ DMLV ~ DMM ~ DMMU ~ DMP ~ DMRB ~ DMRFK ~ DMS ~ DMSO ~ DMSS ~ DMT ~ DMU ~ DMUD ~ DMVIC ~ DMW ~ DMWS ~ Dn. ~ DNA ~ DNC ~ DNO ~ DNP3 ~ Do ~ DO ~ DO operation (DOO) ~ DO train ~ dobbin ~ DoCE ~ dock ~ Docklands Light Railway (DLR) ~ document review notice (DRN) ~ Dodd ~ DoE ~ DOE ~ DoETR ~ dog chart ~ dog it in ~ dog it out ~ dog spike ~ dog’s dick ~ Dogfish (ZFV, ZFW) ~ dogging in ~ dogging it in ~ dogging it out ~ dogging out ~ dogs ~ doll ~ dolly ~ Dolphin (YAO) ~ DOM ~ DoM&EE ~ Domino panel ~ Doncaster accident ~ Donelli ~ donkey ~ donkey dick ~ DOO ~ DOO STN ~ DOO(NP) ~ DOO(P) ~ DoOps ~ door close/locked light ~ door closed switch ~ door interlock ~ door interlock light ~ door judder ~ door leaf ~ door leaf pin ~ door lock assembly ~ door lock switch ~ door motor ~ DOOR OPEN ~ door portal ~ door proving circuit ~ door release ~ DOORS ~ doors closed visual indicator (DCVI) ~ DOP ~ DOR ~ DoS&TE ~ DoT ~ DOTE plan ~ double acting point bolt ~ double bank ~ double bank tamper ~ double banker ~ double blocking ~ double compound ~ double cut ~ double docking ~ double double junction ~ double flange rail wheels ~ double head ~ double headed ~ double headed rail ~ double headed train ~ double heading ~ double junction ~ double line of way ~ double parallel wing (DPW) ~ double rail ~ double rail track circuit ~ double red aspects (RR) ~ double reds ~ double shift ~ double slip ~ double slip diamond ~ double slip switch diamond ~ double tamping ~ double tandem ~ double tongue catch point ~ double tongue trap point (DTT) ~ double track line ~ double turnout ~ double unit ~ double way ~ double weave junction ~ double wire operation ~ double yellow (YY) ~ double yellow aspect ~ double-cut ~ double-end electrical section ~ double-end fed ~ doubling ~ doughnut ~ dovetailed sill ~ dovetailed wood sleeper ~ down (D, Dn.) ~ down and up ~ down direction ~ down fast (DF) ~ down line ~ down main (DM) ~ down relief (DR) ~ down side ~ down slow (DS) ~ down train ~ down-proving ~ downhill ~ downstop ~ Dowty retarder ~ DP ~ DPC ~ DPE ~ DPI ~ DPL ~ DPM ~ DPNSS ~ DPOS ~ DPPP ~ DPPS ~ DPS ~ DPTAC ~ DPU ~ DPW ~ DR ~ DRA ~ DRACAS ~ drag box ~ drag length ~ drain ~ drain train ~ Drain, the ~ drainage survey ~ DRAM ~ draughtsman ~ draw ahead ~ draw ahead signal ~ drawbar ~ drawbar pull ~ drawgear ~ drawhook ~ DRDNI ~ DRDS ~ DRE ~ DRES ~ dressing ~ DRG ~ DRICO ~ drilled ~ drilled both ends (DBE) ~ drilled one end (DOE) ~ drive lug ~ drive rod ~ driveability ~ driveable ~ driven axle ~ driven bogie ~ driver ~ DRIVER ~ Driver Advisory System (DAS) ~ Driver Assessor ~ driver controlled operation (DCO) ~ driver machine interface (DMI) ~ driver only operation (DO, DOO) ~ driver only run-round operations ~ driver only train (DO train) ~ driver vigilance device (DVD) ~ driver vigilance system (DVS) ~ driver’s assistant ~ driver’s crossing indicator ~ driver’s desk ~ driver’s eye level (DEL) ~ driver’s level crossing indicator ~ driver’s line of sight ~ driver’s red light (DRL) ~ driver’s reminder appliance (DRA) ~ driver’s safety device (DSD) ~ driver’s white light (DWL) ~ driverless train operation (DTO) ~ driving ~ driving cab ~ driving cab etiquette ~ driving position ~ driving trailer ~ driving van ~ driving van trailer (DVT) ~ driving wheel ~ DRL ~ DRN ~ drooping ~ drop a track ~ drop a track circuit ~ drop away ~ drop away time ~ drop away voltage ~ drop down ~ drop down post ~ drop head coupling ~ drop shunt ~ drophead Buckeye coupler ~ drophead Buckeye coupling ~ dropped ~ dropped away (DA) ~ dropper ~ Drott ~ DRP ~ DRRD ~ DRS ~ DRSG ~ DRSS ~ drugs and alcohol screening ~ drugs and alcohol testing ~ DRUID ~ drum carrier ~ drumming ~ drumming schedule ~ drumswitch ~ DRW ~ DRWB ~ dry ~ dry insulated joint ~ dry joint ~ dry steam ~ DS ~ DSA ~ DSD ~ DSE ~ DSF ~ DSKY ~ DSL ~ DSLF ~ DSM ~ DSR ~ DST ~ DT ~ DTAD ~ DTB ~ DTBS ~ DTBSO ~ DTCO ~ DTE ~ DTF ~ DTG ~ DTG-R ~ DTI ~ DTLR ~ DTM ~ DTMF ~ DTO ~ DTp ~ DTS ~ DTSO ~ DTSSo ~ DTTASDTV ~ DU ~ DU dry bearing ~ dual aspect ~ dual blow ~ dual braked ~ dual electrified line ~ dual fitted ~ dual gate ~ dual gauge track ~ dual heated ~ dual mode buffer stop ~ dual piped ~ dual signalled line ~ dual voltage ~ dual voltage stock ~ ducklings ~ ducted cable route ~ ducted sleeper ~ ducts, too many ~ dud ~ Duff jack ~ dumb buffers ~ dumbbell ~ dummy ~ DUPLICATE ~ DuPont report, the ~ Durlock ~ dusty bin ~ Dut. ~ Dutch magnets ~ duty holder ~ Duty Operations Manager (DOM) ~ DV ~ DVA ~ DVAE ~ DVD ~ DVLR ~ DVR ~ DVs ~ DVS ~ DVT ~ dwarf signal ~ DWDM ~ dwell time ~ DWG ~ DWL ~ DWWP ~ DX ~ DXF ~ dye penetrant inspection (DPI) ~ dying pig ~ dynamic ~ dynamic analysis ~ dynamic braking ~ dynamic cone penetrometer (DCP) ~ dynamic crosslevel ~ dynamic gauge ~ dynamic level ~ dynamic loop ~ dynamic pedestrian flow modelling ~ dynamic ratio ~ dynamic swept envelope (DSE) ~ dynamic track gauge ~ dynamic track stabiliser (DTS) ~ dynamic track twist ~ dynamic twist ~ dynamic vehicle gauge ~ dynamic vehicle profile ~ dynamometer car

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E

-ex ~ E ~ E board ~ e clip ~ E notice ~ E stock ~ E-type bridge ~ E, L&N ~ E/B ~ E&CHR ~ E&G ~ E&M ~ E&OD ~ E&P ~ E&WYR ~ e+ ~ E+D ~ E1 ~ e1809 ~ e2001 ~ EA ~ EAC ~ EAD ~ EAK ~ EAM ~ EAMG ~ EAMR ~ EAP ~ EAPC ~ EARJ ~ EARL ~ early assessment and sifting tool (EAST) ~ early current on (ECO) ~ early rationalisation of signalling (EROS) ~ EARR ~ earth ~ earth bar ~ earth bond ~ earth distribution network (EDN) ~ earth farm ~ earth fault ~ earth fault detection ~ earth fault relay (EFR) ~ earth flow ~ earth strap ~ earth wire ~ earthed ~ earthing ~ earthing connection ~ earthing device ~ earthing pole ~ earthing switch ~ EARTHSLIP ~ earthwork examiner ~ earthworks ~ earthworks asset register ~ earthworks evaluation ~ earthworks examination ~ EARWIG ~ EAS ~ easement easing ~ easing a curve ~ EAST ~ East Coast ~ East Coast Main Line (ECML) ~ East Midlands Railway (EMR) ~ East Midlands Trains (EMT) ~ East West Rail (EWR) ~ eastbound (EB) ~ Eastern Region (ER) ~ Easy Access Area ~ easy entry chair ~ EAU ~ EAUC ~ EAWA ~ EAWS ~ EAZ ~ EAZIAL ~ eB ~ EB ~ EBB ~ EBD ~ EBI ~ EBI limit ~ EBI Track 200 ~ EBI Track 400 ~ EBIC ~ EBmD ~ EBmI ~ EBS ~ EBSM ~ EBTS ~ EBV ~ EBW ~ EC ~ EC4T ~ ECA ~ ECAM ~ ECAP ~ ECB ~ ECC ~ ECD ~ ECE ~ ECEB ~ echo ~ ECI ~ ECIC ~ ECJWG ~ ECMECML ~ ECN ~ ECO ~ economical facing point lock (EFPL) ~ economiser ~ economising contact ~ ECOS ~ Ecotrack ~ ECP ~ ECR ~ ECRO ~ ECRT ~ ECS ~ ECSAG ~ ECVVR ~ ECZ ~ ED ~ EDC ~ EDCM ~ EDCOS ~ EDCU ~ eddy current brake (ECB) ~ eddy current testing ~ EDF ~ EDGE ~ edge effect ~ edge rail ~ edge seal ~ EDH ~ EDI ~ EDIFACT ~ EDL ~ Edmondson tickets ~ EDN ~ EDNE ~ EDNE Sign ~ EDP ~ EDR ~ EDS ~ EDTA ~ EDVTCS ~ edward ~ EE ~ EE&CS ~ EEA ~ EEB ~ EEBADS ~ EECP ~ EECR ~ EED ~ eel (YMA) ~ EEN ~ EES ~ EF ~ EFA ~ EFE ~ effective traffic moment ~ Efficient Engineering Access (EEA) ~ Efficient Infrastructure Delivery (EID) ~ EFPL ~ EFR ~ EFRTC ~ EG ~ EGF ~ EGIP ~ EGL ~ egress handle ~ EGRET ~ Egret (ZCV) ~ EGTM ~ EH&Co. ~ EHD ~ EHS ~ EI ~ EIA ~ EID ~ EIDER ~ eight hole joint ~ eighths ~ eighths of a mile (eighths) ~ EIM ~ EIMR ~ EIMU ~ EIR ~ EIRENE ~ EIS ~ EIT ~ ejector ~ EKR ~ Eland Cables ~ elapsed timer ~ elastic spike ~ elastic spike fastening ~ elbow ~ ELCB ~ ELCP ~ ELEC LOCO ~ Electra ~ Electra Gel ~ electric ~ electric arc weld ~ electric braking ~ electric cartridge heaters ~ electric locomotive ~ electric multiple unit (EMU) ~ electric pad heaters ~ electric points heating (EPH) ~ electric railway ~ electric signal reverser ~ electric strip heaters ~ electric token block (ETB) ~ electric token instrument ~ electric track trolley ~ electric traction (ET) ~ electric traction depot (ETD) ~ Electric Traction Engineer (ETE) ~ electric traction supply ~ electric traction system ~ electric train ~ electric train detector (ETD) ~ electric train heating (ETH) ~ electric train heating index (ETH index) ~ electric train staff (ETS) ~ electric train supply (ETS) ~ electrical and plant (E&P) ~ electrical bypass switch ~ electrical clearance envelope ~ electrical clearances ~ Electrical Control (EC) ~ electrical control instructions (ECI) ~ electrical control of emergency brake ~ Electrical Control Operator (ECO) ~ Electrical Control Room (ECR) ~ Electrical Control Room Operator (ECRO) ~ electrical envelope ~ electrical equipment ~ electrical release ~ electrical section ~ electrical sub section ~ electrical supply tariff area (ESTA) ~ electrical track equipment (ETE) ~ electrification ~ electrification and plant (E&P) ~ electrification clearances ~ electrification fixed equipment (EFE) ~ electrification measurement vehicle (EMV) ~ Electrification Plant Development Group (EPDG) ~ electrification system ~ electrified line ~ electrified railway ~ electrified track ~ electro-diesel (ED) ~ electro-slag welded crossing vee ~ electro-slag welded vee ~ electro–pneumatic brake (EP Brake, EPB) ~ electron beam weld ~ electronic door control unit (EDCU) ~ electronic logic unit (ELU) ~ electronic token ~ electronic train recording (ETR) ~ electronic train register book (ERTB) ~ Electrostar ~ element ~ element length ~ elephant ears ~ elephant ear insulated rail joint ~ elevated troughing ~ elevation difference ~ ELGAR ~ ELH ~ elk ~ ELL ~ Elliot Junction accident ~ Ellipse ~ elliptical rail ~ ELLSA ~ ELLX ~ ELMTREE elongation index ~ ELP ~ ELPOD ~ ELR ~ Elsenham accident ~ ELSSA ~ Eltham (Well Hall) accident ~ ELU ~ ELV ~ EM ~ EM-SAT ~ embanking ~ embankment ~ Embedded Slab Track (EST) ~ embedded track ~ EMC ~ EMCC ~ emergency alarm ~ emergency brake (EB) ~ emergency brake demand ~ emergency brake intervention (EBI) ~ emergency brake intervention limit (EBI limit) ~ emergency brake plunger ~ emergency braking (EB) ~ emergency braking distance ~ emergency bridging pieces ~ emergency call ~ emergency clamp fishplate ~ emergency clamp joggled fishplate ~ emergency clamps ~ emergency coupling ~ emergency crossover ~ emergency drawbar ~ emergency driving position ~ emergency evacuation ~ emergency ground frame (EGF) ~ emergency indicator (EI) ~ emergency isolated section ~ emergency isolation ~ emergency loop ~ emergency notice (E notice, EN) ~ emergency operations co-ordinator ~ emergency operator (EO) ~ emergency plate ~ emergency protection ~ emergency protection equipment ~ emergency rail cleaning unit (ERCU) ~ emergency recovery adaptor ~ emergency release ~ emergency replacement group ~ emergency replacement switch ~ emergency restriction of speed (ERS, EROS) ~ Emergency Senior On-Call Director ~ emergency shunt ~ emergency signals on control (ESOC) ~ Emergency Special Working (ESW) ~ emergency speed restriction (ESR) ~ emergency switch-off ~ Emergency Traction Current Discharge System (ETCDS) ~ emergency train lights ~ emergency warning indicator (EWI) ~ EMGTPA ~ EMI ~ EML ~ EMMIS ~ EMMIS controller ~ EMO ~ EMP ~ empties ~ empty / loaded changeover valve ~ empty coaching stock (ECS) ~ empty stock ~ EMS ~ EMT ~ EMU ~ EMUD ~ EMV ~ EN ~ ENA ~ Enabling Innovation Team (EIT) ~ encapsulated fishplate ~ encapsulated rail ~ enclosed flangeway ~ encroachment ~ encumbrance ~ end bound ~ end door cut out switch (EDCOS) ~ end of authority (EoA) ~ end of loop marker (EoLM) ~ end of station ~ end post ~ end throw ~ end-on junction ~ ENE ~ energisation warning notice ~ energised ~ energy dissipation buffer stop ~ engagement slot ~ engine ~ engine line ~ engine release line ~ engine retention failure ~ Engineer, the ~ engineer's telephone ~ engineer’s current area (ECA) ~ engineer’s line reference (ELR) ~ engineer’s possession ~ engineer’s saloon ~ engineer’s siding ~ engineer’s train ~ engineered safeguard ~ engineering acceptance ~ engineering acceptance certificate (EAC) ~ engineering access ~ Engineering Access Statement (EAS) ~ engineering allowance ~ engineering compliance certificate (ECC) ~ engineering conformance certificate (ECC) ~ engineering details ~ engineering discipline ~ Engineering Education Scheme (EES) ~ engineering function ~ engineering handbooks ~ engineering hours ~ Engineering Management Systems (EMS) ~ engineering notice (E notice, EN) ~ engineering notice board ~ engineering periods ~ engineering possession ~ engineering protection reminder ~ engineering safety management (ESM) ~ engineering staff ~ Engineering Supervisor (ES) ~ Engineering Supervisor in Charge of Work (ESICOW) ~ Engineering Supervisor’s certificate ~ Engineering Technician (EngTech) ~ engineering token ~ engineering train ~ engineering trip train ~ engineering vehicles ~ engineering work ~ engineering worksite ~ English bond ~ English Electric (EE) ~ English Welsh and Scottish Railway (EWS) ~ ENGNRG WRK ~ ENGNRS TRN ~ enhanced braking ~ enhanced emergency braking ~ enhanced line clear ~ enhanced permissible speed (EPS) ~ enhanced permissible speed sign (EPS sign) ~ Enhanced Railfreight Intermodal Control (ERIC) ~ enhanced service brake ~ enhanced user worked crossing (EUWC) ~ ENS ~ entity in charge of maintenance ~ entrance / exit panel (NX, NX panel) ~ entrance signal ~ entry signal ~ entry ~ entry angle ~ environmental impact assessment (EIA) ~ EO ~ EoA ~ EOCC ~ EOCD ~ EoD ~ EOI ~ EOL ~ EOLM ~ EOR ~ EOS ~ EoT ~ EOTD ~ EOW ~ EP ~ EP brake ~ EPA ~ EPB ~ EPBIC ~ EPDG ~ EPE ~ EPF ~ EPG ~ EPH ~ EPR ~ EPROM ~ EPS ~ EPS authority ~ EPS sign ~ EPT ~ EPU ~ EQAP ~ equal split switch ~ equal split turnout ~ equaliser bar bogie ~ equalising plate ~ equated track mileage (ETM) ~ equilibrium cant ~ equilibrium speed (Ve) ~ EQUIP ~ equipment room ~ equipment support structure (ESS) ~ equipment warning ~ equivalent cant ~ equivalent fatalities ~ equivalent million gross tonnes per annum (EMGTPA) ~ equivalent radius (ER, Re) ~ ER ~ ERA ~ ERAIL ~ ERATV ~ ERCU ~ ERDF ~ ERE ~ ERHC ~ ERI ~ ERIC ~ ERN ~ ERORA ~ EROS ~ EROS board ~ ERPSS ~ ERRI ~ Errington, John Edward ~ ERS ~ ERTMS ~ ERTMS application level ~ ERTMS MA ~ ERTMS movement authority (ERTMS MA) ~ ERTMS on-board equipment ~ ERTMS rollover ~ ERU ~ ERWIN ~ ES ~ ESA ~ ESC ~ eSCAPE ~ escapement ~ escapement joint ~ Eschede accident ~ ESD ~ ESDC ~ ESF ~ ESG ~ ESI ~ ESICOW ~ ESM ~ ESMS ~ ESOC ~ ESPA ~ ESPOIR ~ ESR ~ ESR/TSR ~ ESROG ~ ESRP ~ ESS ~ ESSD ~ EST ~ ESTA ~ estimated front end location ~ ESW ~ ET ~ ETA ~ ETAP ~ ETB ~ ETCDS ~ ETCDS/TT plunger ~ ETCR ~ ETCS ~ ETCS FLR ~ ETCS INPUT ~ ETCS operating modes ~ ETCS override ~ ETCS OVRD ~ ETCSOP ~ ETD ~ ETE ~ ETH ~ ETH index ~ ETHEL ~ ethylene propylene rubber (EPR) ~ ethylene vinyl acetate (EVA) ~ ETLA ~ ETM ~ ETML ~ ETR ~ ETRB ~ ETRM ~ ETS ~ ETSC ~ ETSI ~ ETU ~ EUAR ~ eucalyptus diversicolor ~ eucalyptus marginata ~ EUDD ~ EUKL ~ EURATEL ~ Eurobalise ~ EUROBALT ~ EUROFRET ~ EUROLoop ~ European Passenger Service (EPS) ~ European Rail Agency (ERA) ~ European Rail Traffic Management System (ERTMS) ~ European Rail Traffic Management System (ERTMS) implementations ~ European Rail Traffic Management System operational rules ~ ERTMS operational rules (EOR) ~ European Register of Authorised Types of Vehicles (ERATV) ~ European Train Control System (ETCS) ~ European Train Control System operating modes (general) ~ European Train Control System operating modes (protection and supervision) ~ European Union Agency for Railways (EUAR) ~ European vehicle number (EVN) ~ European vital computer (EVC) ~ Euroscan ~ EuroSPIN ~ Eurostar ~ EUROSTIR ~ eutectic strip ~ EUWC ~ EV ~ EVA ~ EVA bonded cork ~ evaluation ~ evaluation of earthworks ~ evaluation set ~ evaluator equipment ~ EVC ~ Eversholt ~ Eversholt Leasing ~ Eversholt Street ~ EVR ~ EVs ~ EVS ~ EW ~ EW&S ~ EWA ~ EWAT ~ EWD ~ EWI ~ EWID&BJR ~ EWL ~ EWP ~ EWR ~ EWRCo. ~ EWS ~ EWSH ~ EWSR ~ examination frequency ~ examination of earthworks ~ examination of the line Examining Engineer ~ exc. ~ Excalibur screw ~ excavating ~ exceedance ~ exceedence ~ exceptional circumstances ~ Exceptional Hardship Scheme (EHS) ~ exceptional load ~ exceptional rail head conditions (ERHC) ~ excess motion ~ exchange siding ~ excl. ~ exclusive (exc.) ~ EXCOM ~ excursion train ~ execution set ~ exhaust steam ~ exit signal ~ EXLO ~ expansion gap ~ expansion joint ~ expansion switch ~ expectation ~ explosive depth hardening (EDH) ~ express ~ express passenger train ~ Express Sprinter ~ express train ~ EXT ANIMAL ~ EXT OBJECT ~ EXT OTHER ~ Extendalino ~ extended bearers ~ extended timbers ~ extended soleplate ~ extension trunk dialling (ETD) ~ EXTL FIRES ~ EXTL POWER ~ extrados ~ Extreme Weather Action Team (EWAT) ~ EXV ~ eye ~ eye bolts ~ eyeing-in ~ EZP

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F

F ~ f ~ F Stock ~ F/B ~ F+F ~ F2000 ~ F2N ~ FA ~ FABRIC ~ fabricated common crossing ~ fabricated conductor rail ramp ~ fabricated crossing ~ face disc ~ face ring ~ facer ~ FACETS ~ facility owner ~ facing ~ facing crossing ~ facing crossover ~ facing direction ~ facing junction ~ facing movement ~ facing point lock (FPL) ~ facing point lock bar ~ facing point lock test ~ facing points ~ facing switch ~ factory acceptance test (FAT) ~ factory train ~ FAdC ~ FADD ~ FADS ~ fag packet ~ FAI ~ fail safe ~ fail to call (FTC) ~ failed ~ failure (FA) ~ failure to call (FTC) ~ Fair T ~ Fair V ~ Fairbairn, Sir William ~ Fairmont Tamper ~ FALCON ~ Falcon (JNA) ~ fall ~ fallback headway ~ falling latch ~ falling snow ~ falling weight deflectometer (FWD) ~ Fallopia japonica ~ false clear ~ false feed ~ false flange ~ FAMS ~ fan ~ fang bolt ~ fang washer ~ FAPB ~ FAR ~ faregate ~ Fassetta ~ FAST ~ fast (F) ~ fast line ~ fast track GRIP ~ Fastclip (FC) ~ fasten down ~ fasten up ~ fastening ~ fastening down ~ fastening up ~ FAT ~ FATALITIES ~ fatalities and weighted injuries (FWI) ~ fatality ~ FATCOWS ~ fatigue ~ fatigue crack ~ fatigue failure ~ Fatigue Index (FI) ~ fatigue risk management system (FRMS) ~ FATWS ~ Fault and Operations Control ~ fault control ~ Fault Management System (FMS)FB ~ FBAR ~ FBI ~ FBIS ~ FBMIS ~ FBN ~ FBP ~ FBR Co. ~ FBS ~ FBW ~ FC ~ FC15xx ~ FC15xx Fastclip ~ FCAW ~ FCC ~ FCDO ~ FCDRIVER ~ FCFS ~ FCOV ~ FCP ~ FCU ~ FDA ~ FDC ~ FDCS ~ FDDI ~ FDM ~ FDM-NV ~ FDR ~ FDS ~ FE ~ FEA ~ feasibility study ~ feather ~ FEBIS ~ FED ~ feed ~ feed end ~ feeder ~ feeder station (FS) ~ feeder switch ~ feedwater ~ felis silvestris catus ~ FELIX ~ Fell centre rail system ~ Fellow ~ FEMC ~ fence ~ fenced ~ fenced green zone ~ Feng ~ Fennell Report, the ~ FENO marker ~ FEP ~ ferret and dartboard ~ ferrule ~ ferrule cup ~ FETRD fettling ~ FEU ~ FFCCTV ~ FFCR ~ FFF ~ FFFIS ~ FFG ~ FFM ~ FFS ~ FFT ~ FFU ~ FG ~ FGE ~ FGL ~ FGW ~ FH ~ FHD ~ FHH ~ FI ~ fibre optic banner repeating signal ~ fibre optic route indicator (FORI) ~ fibre optic signal ~ fibre-optic indicator ~ FIBU ~ FIC ~ fiddle back ~ fiddle back crossing ~ field corner ~ Field Engineer ~ field face ~ field flow ~ field side ~ filled rail ~ filler beam deck ~ fillet radius ~ filling-in rail ~ final decision point ~ final drive ~ final drive gearbox ~ FIND CREW ~ fine point (FP) ~ finial ~ FIO ~ FIP ~ FIRE ALARM ~ Fire and Emergency Management Centre ~ Fire Detection Controller (FDC) ~ Fire Precautions (Sub-surface Railway Stations) Regulations 1989 ~ fire-resistant blanket ~ firebox ~ firehole ~ firehole door ~ firelamps ~ fireless locomotive ~ Fireman ~ Fireman's call box ~ firm rights ~ FIRO ~ FIRSE ~ First Capital Connect (FCC) ~ first caution ~ first class ~ first come first served (FCFS) ~ First Engineering (FE, Feng) ~ first generation diesel multiple unit ~ first generation DMU ~ First Great Western (FGW) ~ First Line of Response (FLOR) ~ first permanent way stretcher bar ~ first signalling stretcher bar ~ first stretcher bar ~ first train moving away ~ First TransPennine Express (TPE) ~ first wheel replacement (FWR) ~ FIS ~ fish bellied rail ~ fish belly rail ~ fish dock ~ fish plate ~ fishbolt ~ fishbolt hole ~ fishbolt insulations ~ fishbolt spanner ~ fished end ~ fished joint ~ fishing ~ fishing angle ~ fishing plane ~ fishing surface ~ FISHKIND ~ fishplate ~ fishplate bond ~ fishplate hole ~ fishplate insulations ~ fishplate limits ~ fishplate shims ~ fishplated cast monobloc ~ fishplated cast monobloc crossing ~ fishplated rail joint ~ FIST ~ FIT ~ fit for traffic ~ fitness-to-run examination ~ fitted ~ fitter ~ fittings ~ FIU ~ five bar gate ~ five foot ~ five mile line diagram ~ five mile plan ~ fivefoot ~ fixed anchor (FA) ~ fixed balise ~ fixed block ~ Fixed Block Automatic Routing (FBAR) ~ fixed buffer stop ~ fixed diamond ~ fixed distant ~ fixed distant signal ~ fixed distant board ~ fixed earthing device (FED) ~ fixed engine ~ fixed equipment ~ fixed geometry railway ~ fixed infrastructure ~ fixed PeeWee ~ fixed red ~ fixed red signal ~ fixed short circuiting device ~ fixed signals ~ fixed tension (FT) ~ fixed tension system (FTS) ~ fixed termination (FT) ~ fixed termination equipment (FT equipment) ~ fixed termination system (FTS) ~ fixed-type switch ~ fixity ~ FJ ~ FJA ~ FK ~ FL ~ FL95 ~ FLAB ~ flag memory ~ flagging ~ flagman ~ flags ~ flake ~ flakiness index ~ flaking ~ flame cut ~ flame cut rail ~ flanch ~ flange ~ flange angle ~ flange back ~ flange back blend ~ flange back clearance ~ flange back contact ~ flange climb ~ flange contact angle ~ flange contact zone ~ flange cover ~ flange gauge ~ flange height ~ flange lubricator ~ flange marks ~ flange rail ~ flange root ~ flange running crossing ~ flange thickness ~ flange tip ~ flange toe ~ flange width ~ flanged rail ~ flangeway ~ flangeway clearance ~ flangeway dimension ~ flangeway gap ~ flangeway opening ~ flangeway wall ~ flank points ~ flank protection ~ flare ~ flash butt weld (FBW) ~ flash notice ~ flash sign ~ flash test ~ flash weld ~ flash-over ~ flashover ~ flashing aspect ~ flashing double yellow (FYY) ~ flashing double yellow aspect ~ flashing green aspect (FG) ~ flashing single yellow (FY) ~ flashing single yellow aspect ~ Flashing Yellow ~ FLAT ~ flat ~ flat angle ~ flat angle crossing ~ flat bottom ~ flat bottom rail (FB) ~ flat bottom switch ~ flat bottom track ~ flat crossing ~ flat curve ~ flat junction ~ flatbed wagons ~ flatbottom ~ flatrol ~ flaunches ~ FLAWS ~ FLC ~ flecking ~ Flemish bond ~ Fletcher fishplates ~ fletching ~ flexed layout ~ flexed S&C layout ~ flexed switch and crossing layout ~ flexible switch ~ flexible train arrival point (FTAP) ~ flexible wing crossing ~ FLHH ~ flight ~ flighting ~ FLIRT ~ float rail ~ floater ~ floating platform ~ floating slab track ~ flood ramp ~ flood span ~ FLOODING ~ floor beam ~ floor plate ~ FLOR ~ FLT ~ fly move ~ fly rope ~ fly shunting ~ fly-fished joint ~ flyer ~ flying arch ~ Flying Banana ~ flying buttress ~ flying ducks ~ flying junction ~ flying pigs ~ flying tail ~ flying tail registration ~ flyover ~ FM ~ FMEA ~ FMECA ~ FMES ~ FMI ~ FML ~ FMS ~ FMU ~ FN ~ FNW ~ FO ~ FOAC ~ FOB ~ FOC ~ FOC CONN ~ FOC INFRA ~ FOC OTHER ~ FOC UNEX ~ fog ~ fog arms ~ fog hut ~ fog machine ~ fog object ~ fog signals ~ foggies ~ fogging ~ fogging post ~ fogging repeater ~ Fogman ~ Fogsignalman ~ FOL ~ FOL-LATE ~ FOL-ONTIME ~ follow-on crossovers ~ follow-on lead ~ follow-ons ~ FOOC ~ foot ~ foot crossing ~ foot relief ~ footbridge (FB) ~ footex ~ footfall ~ footpath level crossing (FP) ~ FPW ~ footplate ~ FOOTPRINT ~ footstep light ~ FOP ~ FOR ~ for cause screening ~ for cause testing ~ Ford factor ~ FORI ~ Form 1 ~ Form 2 ~ Form 3 ~ Form 4 ~ Form 5 ~ Form 6 ~ Form A ~ Form AE ~ Form B ~ Form B2 ~ Form C ~ Form D ~ Form E ~ form of signal ~ formal investigation ~ formation ~ formation failure ~ formation level ~ formation renewal ~ formation slope ~ formation stiffness ~ formation treatment ~ forth bridge rail ~ forward route ~ FOT ~ FOTS ~ FOU ~ Foul ~ foul notch ~ foul platform clearance ~ foul track circuit ~ fouling bar ~ fouling point (FP) ~ foundation stone ~ four aspect colour light signal ~ four aspect signal ~ four aspect signalling ~ four bar gate ~ four foot ~ four hole ~ four hole joint ~ four point lining ~ four track railway ~ four wire voice frequency ~ four-throw ~ fourfoot ~ fourth rail ~ FOW ~ Fowler, Sir John ~ Foxhall accident ~ Foxhall Control ~ foxtrot ~ FP ~ FPA ~ FPC ~ FPI ~ FPIP ~ FPK ~ FPL ~ FPM ~ FPO ~ FPS ~ FPW ~ FPWI ~ FR ~ FR4 ~ FRACAS ~ FRAME ~ frame ~ frame twist ~ framework contractor ~ franchise agreement ~ franchised station ~ frangible link ~ frangible platform ~ Frauscher ~ Frauscher Sensortechnik GmbH ~ FRD ~ fred ~ FREDDY ~ frederick ~ free ~ free aspect ~ free curving ~ free on rail (FOR) ~ free on wheels (FOW) ~ free rail ~ free running ~ free running equipment ~ free running OCS ~ free wheel clearance (FWC) ~ free wheel passage (FWP) ~ free wheel passage at check or wing entry ~ free wheel passage at crossing nose ~ free wheel passage in switches ~ free wired interlocking ~ free yellow ~ freewheel time ~ freight ~ freight differential ~ freight forwarder ~ freight grants ~ freight lifted ~ freight line ~ freight moved ~ freight multiple unit (FMU) ~ freight only line ~ freight operating company (FOC) ~ freight operating unit (FOU) ~ freight standards ~ freight terminal ~ freight train ~ freight train load book (FTLB) ~ freight vehicle ~ Freightliner Heavy Haul (FHH, FLHH) ~ Freightliner Ltd (FL) ~ French drain ~ frequency ~ frequency division multiplex (FDM) ~ fretting ~ FRI ~ friction buffer stop ~ friction modifier ~ friction retarder buffer stop ~ friction stir welding (FSW) ~ Fridera ~ friends of stations ~ frig ~ frigging ~ fringe ~ fringe box ~ fringe signal box ~ FRMS ~ frog ~ frog trolley ~ front contact ~ front fishbolt hole ~ front joint ~ front shift ~ front stretcher bar ~ fronts ~ frost heave ~ frozen joint ~ FRP ~ FRR ~ FRS ~ Fruin ~ Fruin level of service ~ Fruin LOS ~ FRV ~ FS ~ FS2600 ~ FS mode ~ FSC ~ FSE ~ FSH ~ FSP ~ FSR ~ FSS ~ FSW ~ FT ~ FT equipment ~ FTA ~ FTABS ~ FTAC ~ FTAP ~ FTC ~ FTE ~ FTL ~ FTLB ~ FTN ~ FTNe ~ FTNx ~ FTO MISRTE ~ FTO OTHER ~ FTP ~ FTPE ~ FTR ~ FTS ~ FTT ~ FTTP ~ FU ~ fuelling apron ~ fuelling line ~ fuelling road ~ FUG ~ full and standing ~ full barriers ~ full current dropper ~ full current jumper ~ full depth switch ~ full drape ~ full normal ~ full normal position ~ full overlap ~ full reverse position ~ full screen height (FSH) ~ full section ~ full section break ~ full service ~ full service brake ~ full service brake position ~ full set of switches ~ full supervision ~ full supervision mode (FS) ~ full travel position ~ full-through ~ fully fitted ~ function ~ functional insulation ~ functional specification (FS) ~ functional supply point (FSP) ~ FUNGUS ~ funicular railway ~ FURNO ~ Furrer+Frey (F+F) ~ FUT ~ FutureRailway Programme ~ FV ~ FVs ~ FVS ~ FW ~ FWC ~ FWD ~ FWI ~ FWP ~ FWR ~ FX ~ FY&NR ~ FZ

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G

G ~ g ~ G stock ~ G&PJR ~ G&SWR ~ GA ~ GA drawing ~ gabion ~ GADEROS ~ Galaxy inspection ~ gall ~ galvanometer ~ galvo ~ GAMAB ~ Gane (YLO, YLP) ~ gang ~ gang bus ~ Ganger ~ gangway ~ gangwayed ~ gannet ~ gantlet track ~ gantry ~ gantry relaying ~ gantry signal ~ gap jumper ~ gapped ~ garland ~ Garratt locomotive ~ gas axe ~ gas bag points ~ gas cut ~ gas points heating ~ gas pressure weld (GPW) ~ gas turbine locomotive ~ GAS/WATER ~ gate ~ gate box ~ gate stop lever ~ gate wheel ~ gatekeeper ~ gateline ~ GATES ~ GatEx ~ gathering line ~ gathering rails ~ GatorTM ~ Gatso signal ~ Gatwick Express ~ gauge ~ gauge clearance ~ gauge clearance analysis ~ gauge corner ~ gauge corner cracking (GCC) ~ gauge face ~ gauge infringement ~ gauge line ~ gauge management insulator ~ gauge of the throat of the wheels ~ gauge panel ~ gauge plate ~ gauge point ~ gauge rails ~ gauge retention ~ gauge shoulder ~ gauge side ~ gauge spread ~ gauge stop ~ gauge tie ~ gauge tie bar ~ gauge transition ~ gauge variation ~ Gauge War, the ~ gauge widening ~ gauging ~ gauging survey ~ gauging tolerances ~ gauging train ~ gauntlet track ~ gauntletted track ~ GB&KJR ~ GB&P ~ GBFM ~ GBPRT ~ GBRf ~ GBTP ~ GBTT ~ GC ~ GCC ~ GCD ~ GCR ~ GCRN ~ GCRW ~ GCSS ~ GCV ~ GD ~ GDI ~ GDIP ~ GDO ~ GDU ~ GE ~ gear pan ~ GEC ~ GEFF ~ Geismar ~ Gemini ~ GEMINI ~ GEML ~ GEN ~ general arrangement drawing (GA, GA drawing) ~ general engineering inspection ~ general purpose crane (GPC) ~ general purpose track repair and maintenance machine (GP-TRAMM, TRAMM) ~ general repair ~ generator ~ generator coach ~ generator van ~ generator wagon ~ generic question sets (GQS) ~ GENIUS ~ geoblanket ~ GEOGIS ~ geographic data ~ geographic data language (GDL) ~ geographical interlocking ~ geographical junction ~ geographical relay interlocking ~ Geogrid ~ geometry ~ geometry marking ~ geometry recording ~ george ~ Georgemas plunger ~ geotextile ~ Geoweb ~ GER ~ GERTRUDE ~ GEST ~ GETS ~ getting a margin ~ GF ~ GFPEBRSS ~ GFT ~ GFTN ~ GGI ~ Ghníomhaireacht um Fháil Iarnród ~ GI ~ gib and cotter ~ gibbon ~ Gidea Park accident ~ GIFA ~ GIJ ~ Gilchrist Report, the ~ ginney line ~ girdering ~ GIS ~ give a warning, to ~ giving on ~ giving out ~ GJT ~ GKS ~ GL ~ Glanrhyd Bridge accident ~ GLAP ~ Glasgow St. Enoch accident ~ glass signal box ~ GLCT ~ GLE ~ Global Navigation Satellite System (GNSS) ~ Global System for Mobile Communications – Railways (GSM-R) ~ Gloucester Floating Axle ~ Gloucester Floating Axle suspension ~ Gloucester Railway Carriage and Wagon Company (GRC&W) ~ GLT ~ glued insulated joint (GIJ) ~ GLV ~ GLW ~ Glynde accident ~ GM ~ GMITA ~ GMPTA ~ GMPTE ~ GN ~ GNER ~ GNR ~ GNRI ~ GNRTS ~ GNSR ~ GNSS ~ GNYE ~ go zone ~ GoA ~ goal post ~ GOBE ~ GOBI ~ GOBLIN ~ godfathered ~ going round the corner ~ Gold / Silver / Bronze Command ~ golden assets ~ Goldschmidt process ~ Goldschmidt reaction ~ golf ~ GOMMMS ~ gong ~ gonging-off ~ Gooch, Daniel ~ good ~ good practice guide (GPG) ~ goods ~ goods line ~ goods loop ~ goods refuge loop ~ goods station ~ goods train ~ GOOSE ~ gooseneck ~ Gotcha ~ Gotcha monitoring system ~ Governance for Railway Investment Projects (GRIP) ~ GP ~ GP-TRAMM ~ GPC ~ GPDO ~ GPG ~ GPL ~ GPLS ~ GPON ~ GPR ~ GPRS ~ GPS ~ GPS base station ~ GPU ~ GR ~ grade ~ grade A ~ grade A rail ~ grade B ~ grade B rail ~ grade crossing ~ grade crossing predictor ~ grade of rail steel ~ grade separated ~ grade separated crossing ~ grade separated junction (GSJ) ~ grades of automation (GoA) ~ gradient ~ gradient post ~ Grampus (ZBO, ZBP, ZBQ, ZBV, ZBW) ~ Grand Central ~ grandfather rights ~ grass track ~ gravity shunting ~ gravity-worked railway ~ GRC ~ GRC&W ~ grease distribution unit (GDU) ~ greaser ~ Great Britain Passenger Railway Timetable (GBPRT) ~ Great British Travelling Public, the (GBTP) ~ Great Central Railway (GCR) ~ Great Northern ~ Great Unwashed, the ~ Great Western Main Line (GWML) ~ Great Western Railway (GWR) ~ Great Western Renaissance (GWR) ~ Greater Anglia ~ Greathead, James Henry ~ Greaves, Hugh ~ Greaves' and Douglas fishjoint chair and sleeper ~ Greaves’ surface packed (pot) sleepers ~ GrEC ~ green (G) ~ green aspect ~ green automatic warning system magnet ~ green AWS magnet ~ green banner ~ green block ~ green card ~ green carded ~ green carding ~ green circle ~ green pages ~ green square ~ green track ~ green zone ~ Green Zone Access Co-ordinator (GZAC) ~ Green Zone Access Manager (GZAM) ~ green zone working ~ Gregory, Charles Hutton ~ gricer ~ gricex ~ grid ~ gridiron ~ grinding ~ GRIP ~ GRIP 3 AIP ~ GRIP for Programmes ~ GRIP for Projects ~ gripper ~ GRN ~ gronk ~ grooved pad ~ grooved rail ~ gross laden weight (GLW) ~ gross trailing weight (GTW) ~ ground disc ~ ground disc signal ~ ground frame (GF) ~ ground frame operator ~ ground penetrating radar (GPR) ~ ground plan ~ ground position light (GPL) ~ ground position light signal (GPLS) ~ ground relay ~ ground shunt signal ~ ground signal ~ ground staff ~ ground switch panel (GSP) ~ group ~ group of sidings ~ group replacement switch ~ group standard ~ Grouping ~ grout pads ~ growler ~ GRP ~ GRS ~ GRV ~ GSIM ~ GSJ ~ GSM ~ GSM-R ~ GSM-R FLR ~ GSP ~ GSPP ~ GSRP ~ GTC ~ GTE ~ GTG ~ GTI ~ Gtkm ~ Gtm ~ GTO ~ GTO thyristor ~ GTR ~ GTRM ~ GTW ~ guaranteed power supply ~ Guard ~ guard boarding ~ guard rails ~ Gudgeon ~ guidance and stabilisation system ~ Guide to Railway Investment Projects (GRIP) ~ guided busway ~ guideway ~ Guildford accident ~ gulley ~ gully ~ gut rail ~ guts ~ GUV ~ guzunder ~ GV ~ GVA ~ GVR ~ GVs ~ GVS ~ GVT ~ GW ~ GW113 ~ GWC ~ GWCB ~ GWEP ~ GWESPA ~ GWI ~ GWML ~ GWR ~ GWT ~ GWUG ~ GWZ ~ GX ~ GY ~ GZAC ~ GZAM ~ GZTS

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H

H ~ H carded ~ H frame bogie ~ H pad ~ H rail ~ H stock ~ H/S ~ H&BR ~ H&CR ~ H&K ~ H&OJR ~ H&S ~ H&SE ~ HA ~ HABD ~ HABD FAULT ~ Hackworth, Timothy ~ Haddock (ZCO) ~ hairpin ~ Hake (ZBA) ~ HAL ~ half barrier ~ half baseplate ~ half beam spread ~ half chair ~ half chord ~ half cock ~ half cocked ~ half diamond ~ half lead ~ half loc. ~ half location ~ half rail ~ half set ~ half set of switches ~ half step ~ half through ~ Halibut (YCA) ~ HALL ~ Hallade ~ Hallade monument ~ Hallade recorder ~ Hallade track recorder ~ Hallade survey ~ Hallade, Emile ~ HALO ~ halt ~ hambone clip ~ hammer blow ~ hand ~ hand danger signal ~ hand lever ~ hand lever switch ~ hand points ~ hand trolley ~ handback ~ handbook ~ handbrake ~ handed ~ handing ~ handing back ~ handing back the road ~ Handite ~ handover ~ hands on ~ handsignal ~ Handsignaller (HS) ~ Handsignalman ~ hangar test ~ hanger ~ hanging sleeper ~ hard over tilt failed (HOTF) ~ hard road ~ hardboard packs ~ Hardlock ~ hardwood (HW) ~ hardwood sleeper ~ harmonic damper ~ harmonic filter ~ harp brackets ~ harp units ~ Harrington Hump ~ Harrow and Wealdstone accident ~ harry ~ Harsco ~ Harsco Track Technologies. ~ has been ~ HASAW ~ HASAWA ~ Hasler, the ~ HAT ~ HAT tool ~ Hatfield accident ~ haunch ~ haunching ~ HAVS ~ Hawes Junction accident ~ Hawk ~ Hawker ~ Hawkshaw, John ~ HAZ ~ HAZAN ~ hazard ~ HAZARD ~ hazard brake ~ hazard directory ~ hazard lights ~ HAZCHEM ~ HAZID ~ HAZOP ~ HB ~ HBA ~ HBC ~ HBCS ~ HBD ~ HBE ~ HBF ~ HBFR ~ HBFS ~ HBG ~ HBI ~ HBL ~ HBM ~ HBN ~ HBO ~ HBP ~ HBR ~ HBS ~ HBSW ~ HBT ~ HBU ~ HBW ~ HC ~ HCAMS ~ HCB ~ HCC ~ HCD ~ HCD curve ~ HCF ~ HCP ~ HCR ~ HCS ~ HDM ~ HDPE ~ HDSL regenerator ~ HDSL repeater ~ HDSLHE ~ head ~ head bond ~ head checking (HC) ~ head code ~ head margin ~ head on ~ head planing ~ head repair weld (HRW) ~ head rope ~ head span ~ head span wire ~ headshunt ~ headspan ~ headstock ~ headwall ~ headwall plunger ~ headwall tunnel telephone ~ headway ~ headway chart ~ headway curve ~ headway distance ~ headway post ~ headway service ~ headway speed ~ headwear ~ Health and Safety Regulation Committee ~ heat affected zone (HAZ) ~ heat patrol ~ heat speed ~ HEAT SPEED ~ heat treated rail (HT) ~ heater ~ heater pad ~ Heathrow Connect (HC) ~ Heathrow Express (HEX) ~ heave ~ heavy maintenance (HM) ~ heavy rail (HR) ~ heavy work ~ HEC ~ Heck accident ~ HED ~ Hedgehog ~ hedgehog sleeper ~ Hedley, William ~ heel ~ heel anchor block ~ heel baseplate ~ heel block ~ heel chair ~ heel joint ~ heel of planing ~ heel of switch planing ~ heel of the switch planing ~ heel of transition ~ heel setting ~ HEF ~ height ~ height adjustment pad ~ height and stagger ~ height and stagger survey ~ helical spring screw ~ HEMBOT ~ Hendy review, the ~ Henry Williams ~ HEO ~ HEP ~ HER ~ Her Majesty’s Railway Inspectorate (HMRI) ~ Heracleum mantegazzianum ~ heritage railway ~ Heritage Railway Association, The (HRA) ~ HERMES ~ HEROE ~ Heron (YCV) ~ Herring (ZLV) ~ HET ~ HEX ~ Hey-Back ~ Hey-Back clip ~ Hey-Back system ~ HF ~ HFDG ~ HFTC ~ HGUV ~ HGV ~ HH ~ HHLR ~ hi-vis. vest ~ HICSE ~ Hidden limits ~ Hidden rules ~ hierarchy of hats ~ high ~ high base chair ~ high cant deficiency curve (HCD curve) ~ high carbon austenitic manganese rail (HCAMS) ~ high cube ~ high density polyethylene (HDPE) ~ high frequency track circuit (HFTC) ~ high leg ~ high level ~ high level output specification (HLOS) ~ high output ~ high output ballast cleaner (HOBC) ~ high output overhead plant (HOOP) ~ high output plant system (HOPS) ~ High Performance Switch System (HPSS) ~ high rail (HR) ~ high rail only (HRO) ~ high rail wear ~ high ride ~ high ride RRV ~ high risk failure ~ high speed ~ high speed AC ~ high speed check rail ~ High Speed Line (HSL) ~ high speed line (HSL) ~ High Speed One (HS1) ~ high speed ramp ~ High Speed Track Recording Coach (HSTRC) ~ High Speed Train (HST) ~ High Speed Two (HS2) ~ High Speed Two Limited (HS2 Ltd.) ~ high spot ~ high stability sole plate ~ high track fixity ~ high-floor tram ~ highway authority ~ Hillhouse accident ~ hind margin ~ hindwall ~ His Majesty’s Railway Inspectorate (HMRI) ~ historic TSR ~ HIT ~ hit area ~ Hither Green accident ~ Hixon accident ~ Hixon modifications ~ Hixon mods ~ HJR ~ HL ~ HLOS ~ HLV ~ HM ~ HM ~ HMFI ~ HMI ~ HML ~ HMM ~ HMO ~ HMP ~ HMQ ~ HMR ~ HMRI ~ HMS ~ HMW ~ HN ~ HNC ~ HNR ~ HNRC ~ HO ~ HOBC ~ HOBT ~ HOE ~ hog curve ~ hogbacks ~ hogged fishplate ~ hogged switch ~ hogging ~ HOI ~ HOIF ~ HoldFast ~ holding brake ~ holding siding ~ Hole Diggers ~ hollow axle ~ hollow bearers ~ hollow sleeper ~ hollow spandrel ~ HOLLY ~ Holman locomotive ~ Holton Heath accident ~ home no. 1 signal ~ home no. 2 signal ~ home normal contact ~ home normal control (HNC) ~ home shed ~ home signal ~ home station ~ HOOB ~ hood ~ hook coupling ~ hook switch ~ HOOP ~ hoops ~ hoover ~ hopper ~ hopper wagon ~ HOPS ~ horizontal alignment ~ horizontal curve ~ horizontal defect ~ horizontal gather ~ horizontal half-beam angle ~ horizontal tappet lever frame ~ horn ~ horn guide ~ horned sill ~ horse dock ~ HOT ~ hot axle box ~ hot axle box detector (HABD) ~ hot box ~ hot rail ~ hot strip ~ hot tears ~ hot weather patrol ~ hot weather site ~ hot wheel detector (HWD) ~ hotel ~ hotel power ~ HOTF ~ HOTR ~ HOTRT ~ housetop ~ housing ~ HOV ~ HOWL ~ HP ~ HP-0-80 pantograph gauge ~ HPPE ~ HPRail ~ HPSA ~ HPSS ~ HQA ~ HR ~ HRA ~ HRC ~ HRCH ~ HRO ~ HRS ~ HRW ~ HS ~ HS2 ~ HS2 Ltd. ~ HSA ~ HSB ~ HSBC ~ HSBC Rail ~ HSBV ~ HSC ~ HSCB ~ HSCC ~ HSCCP ~ HSD ~ HSDR ~ HSDT ~ HSE ~ HSEQ ~ HSF ~ HSFV ~ HSGT ~ HSH ~ HSISE ~ HSL ~ HSLM ~ HSM ~ HSO ~ HSP ~ HSQE ~ HSR ~ HSRD ~ HSS ~ HST ~ HST2 ~ HSTR ~ HSTRC ~ HSTRT ~ HSWA ~ HSX ~ HSY ~ HT ~ HTS ~ HU ~ Huck ~ Huck bolt ~ Huck pin ~ Hudd Inductive Automatic Warning System ~ Huddersfield accident (1919) ~ Huddersfield accident (1989) ~ Huddersfield control ~ Hudson, George ~ Hull Trains ~ human factors ~ hump ~ hump shunting ~ hump yard ~ hunting ~ hurry ~ HUSARE ~ HUSH ~ HUSH rail ~ hustle alarm ~ hutch ~ HV ~ HV Vest ~ HVAC ~ HVI ~ HVs ~ HVS ~ HW ~ HWA ~ HWD ~ HWGR ~ HWI ~ HWL ~ HWO ~ HWP ~ HWR ~ HWS ~ HWT ~ HWTA ~ HWW ~ HWxxxx ~ HX ~ HXE ~ Hy-drive ~ hybrid Bill ~ hybrid box ~ hybrid gauging ~ hybrid signal box ~ Hyde accident ~ hydraulic buffer stop ~ hydro-pneumatic points ~ hydro-pneumatic switch ~ Hydulignum ~ Hymek ~ HyperRoute

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I

I ~ i-RAMP ~ I-SSI ~ I/L ~ I/O ~ I&I ~ I0 ~ I1 ~ I2 ~ I3 ~ I4 ~ I5 ~ I6 ~ I7 ~ I8 ~ I9 ~ IA ~ IAF ~ IAL ~ IAMS ~ IAP ~ IAPI ~ Iarnród Éireann (IÉ) ~ IARO ~ IATP ~ IB ~ IB section (IBS) ~ IBCL ~ Iberian gauge ~ IBH ~ IBH signal ~ IBIS ~ IBJ ~ IBS ~ IC ~ IC–125 ~ IC–225 ~ ICC ~ ICCN ~ ICCS ~ ICDB ~ ICE ~ ice load ~ ice loading ~ ice mode ~ Icelert ~ ICI ~ ICIG ~ ICM ~ ICMU ~ ICOM ~ ICONIS ~ ICP ~ ICPTUR ~ ICR ~ ICRR ~ ICRTD ~ ICS ~ ICTS ~ ICW ~ ID ~ ID&T ~ IDC ~ IDC/IDR ~ IDD ~ IDDD ~ IDF ~ IDG-S ~ IDL ~ IDL telegram ~ IDLH ~ IDMT ~ IDP ~ IDR ~ IDS ~ IDT ~ IE ~ IÉ ~ IEA ~ IEC ~ IECC ~ IECC Lite ~ IED ~ IEDIM ~ IEE ~ IEEE ~ IEI ~ iELC ~ IEP ~ IERS ~ IET ~ IEV ~ IF ~ IFA ~ IFC ~ IFE ~ IFP ~ IFS ~ IG ~ IGA ~ IGB ~ IGBT ~ IGC ~ igloo ~ IGMP ~ IGS ~ IH ~ IHA ~ II ~ IIA ~ IIE ~ IIF ~ IIP ~ IJ ~ IK ~ IKB ~ IKF ~ IL ~ ILGGRI ~ ILL PASS ~ illiterate symbols ~ illuminated diagram ~ ILO ~ iLS ~ ILWS ~ IM ~ IMACS ~ IMB-R ~ IMC ~ IMCo ~ IMC2 ~ IMC2000 ~ IMDG ~ IMDM ~ IMDU ~ IME ~ IMechE ~ IMG ~ IMIS ~ IMM ~ immediate cause ~ immune ~ immunisation ~ immunised ~ IMPACT ~ impact coefficient ~ impact wrench ~ impact zone ~ Impatiens glandulifera ~ impedance bond ~ impervious membrane ~ implementation ~ impost ~ improvement notice ~ IMPS ~ IMR ~ IMT ~ IMU ~ IN ~ in ~ in advance ~ in advance of ~ in connection with (ICW) ~ in correspondence ~ in fog and rain… ~ in plane ~ in rear ~ in rear of ~ in running (IR) ~ in running wire (IRW) ~ in service ~ in traffic ~ In-bearer Clamp Lock (IBCL) ~ in-cab signalling ~ in-cab signals ~ in-running (IR) ~ in-running wire ~ in-span insulation ~ in-span jumper ~ inbound ~ inc. ~ incident ~ Incident Co-ordination Centre (ICC) ~ incl. ~ inclination ~ inclined ~ inclined design S&C ~ inclined design switches ~ inclined design switches and crossings (inclined S&C) ~ inclined rail ~ inclusive ~ incoming feeder (IF) ~ Incorporated Engineer ~ INCOSE ~ indentation ~ independent alignment ~ Independent Competent Person (ICP) ~ independent line ~ independent position light signal ~ independently rotating wheel (IRW) ~ india ~ indication ~ indication locking ~ indicative running time (IRT) ~ indicative train plan (ITP) ~ indicative train service specification (iTSS, ITSS) ~ indicator ~ indirect fastening ~ indirect opposing locking ~ indirect reverse ~ individual ~ individual function switch (IFS) ~ individual point switch ~ individual risk ~ individual working alone (IWA) ~ induction loop ~ inductive loop warning system (ILWS) ~ INDUS ~ INDUSI ~ industrial locomotive ~ industry common induction (ICI) ~ Industry Standards Coordination Committee (ISCC) ~ INF ~ INF FIRE ~ INF NFF ~ INF OTHER ~ Infill electrification ~ infill loop ~ Informed Traveller ~ infraco ~ Infrarail ~ infrastructure ~ Infrastructure Asset Management System (IAMS) ~ Infrastructure Controller ~ Infrastructure Design Group – Signalling (IDG-S) ~ Infrastructure Design Group (IDG) ~ Infrastructure Fault Control (IFC) ~ infrastructure maintainer ~ Infrastructure Maintenance Company ~ Infrastructure Maintenance Contractor (IMC) ~ Infrastructure Maintenance Manager (IMM) ~ Infrastructure Maintenance Protection Coordinator (MPC) ~ Infrastructure Maintenance Unit (IMU) ~ Infrastructure Manager (IM) ~ Infrastructure Planning Commission (IPC) ~ Infrastructure Service Unit (ISU) ~ infringement ~ injectors ~ inland port ~ inline neutral section ~ INLORS ~ INM ~ inner distant signal ~ inner home signal ~ inner rail ~ inner tell tales (ITT) ~ inner tread ~ inner wheelbase (IWB) ~ INS ~ Insells Lock ~ insert ~ inset switch ~ inside ~ inside a signal ~ inside arm signal ~ inside guard rail(s) ~ inside keyed chair ~ inside rail ~ inside slip ~ inspection interval ~ inspection saloon ~ installation temperature ~ installer ~ instantaneous change of bearing (ICOB) ~ instantaneous change of direction ~ instantaneous change of radius ~ Instanter coupling ~ Institute of Rail Welding. (IoRW) ~ Institute of Railway Research (IRR) ~ Institution of Civil Engineers (ICE) ~ Institution of Engineering and Technology (IET) ~ Institution of Mechanical Engineers (IMechE) ~ Institution of Railway Operators (IRO) ~ Institution of Railway Signal Engineers (IRSE) ~ instruction board ~ insulated block joint (IBJ) ~ insulated fishplate ~ insulated joint (IJ) ~ insulated knuckle ~ insulated overlap ~ insulated overlap span ~ insulated rail ~ insulated rail joint (IRJ) ~ insulated section ~ insulated soleplate ~ insulated stretcher bar ~ insulating trough ~ insulator ~ insulator flashover ~ integrated control centre (ICC) ~ Integrated Electronic Control Centre (IECC) ~ Integrated Engineering Lifecycle (iELC) ~ Integrated On-board Information System (IBIS) ~ integrated on-street tramway ~ Integrated Train Planning System (ITPS) ~ Integrated Transport Authority (ITA) ~ Integrated Transport Smartcard Organisation (ITSO) ~ INTER ~ inter-car jumper ~ inter-modal freight terminal ~ inter-tripping ~ interchange ~ Intercity (IC) ~ Intercity 125 (IC-125) ~ Intercity 225 (IC-225) ~ Intercity Express Train (IET) ~ interdisciplinary ~ interdisciplinary design check (IDC) ~ interdisciplinary design review (IDR) ~ interface ~ interface slab ~ INTERFRIGO ~ Interim Voice Radio System (IVRS) ~ interlaced bearers ~ interlaced retarder trap points ~ interlaced sleepers ~ interlaced timbers ~ interlaced track ~ interlinking ~ interlock ~ interlock circuit ~ interlocking ~ interlocked ~ interlocking area ~ interlocking boundary ~ interlocking frame ~ interlocking functional program ~ interlocking of level crossings ~ intermediate ~ intermediate block ~ intermediate block home ~ intermediate block home signal (IBH signal) ~ intermediate block section (IB section, IBS) ~ intermediate block signal (IBS) ~ intermediate catenary wire ~ intermediate end vestibule ~ intermediate Lookout ~ intermediate point ~ intermediate signal box ~ intermediate token instrument ~ intermediate vehicle ~ intermittent sidewear ~ intermodal ~ intermodal freight ~ intermodal unit ~ internal data link (IDL) ~ internal rail flaw ~ internal state ~ International Organization for Standardization (ISO) ~ International Rail Research Board (IRRB) ~ International Union of Railways (UIC) ~ interoperability ~ interoperable train ~ interpose ~ interpret ~ interpreting ~ interpretability ~ interpretable ~ intersecting switch ~ intersection bridge (IB) ~ intersection of gauge lines (IP) ~ intersection point (IP) ~ interval ~ intervention ~ intervention curve ~ intervention limit ~ INTIS ~ intolerable risk ~ intra-peak ~ intrados ~ intrinsic roll-over wind speed ~ invasive species ~ Invensys Rail ~ invert ~ invert level ~ inverted siphon ~ inverter ~ INWD CREW ~ INWD STOCK ~ IO ~ IOA ~ IOPI ~ IOR ~ IORPS ~ IoRW ~ IOS ~ IP ~ iPAT ~ IPC ~ IPEMU ~ IPF ~ IPFAS ~ IPL ~ IPM ~ IPMI ~ IPNP ~ IPPR ~ IPS ~ IPU ~ IQ ~ IR ~ IRC ~ IRCA ~ IRCAS ~ IRF ~ IRIS ~ IRIS II ~ IRJ ~ IRM ~ IRMS ~ IRO ~ iron and steelwork only ~ iron horses ~ iron lung ~ iron men ~ ironwork only ~ IRR ~ IRRB ~ IRRRS ~ IRRS ~ IRS ~ IRSA ~ IRSE ~ IRT ~ IRTN ~ IRW ~ IS ~ is line clear? ~ IS mode ~ ISA ~ Isaac ~ ISBP ~ ISCC ~ ISDN ~ ISG ~ Island Line ~ Island Line Trains (IL) ~ island platform ~ island track circuit ~ ISLG ~ ISM ~ ISMS ~ ISO ~ ISO container ~ isolated ~ isolating section ~ isolating transformer ~ isolation ~ isolation details form (IDF) ~ isolation diagram ~ isolation mode (IS) ~ ISP ~ ISP-Scheme ~ ISPBX ~ ISRS ~ ISS ~ ISSTIST ~ ISTP ~ ISU ~ ISV ~ IT ~ ITA ~ ITCS ~ ITD ~ item ~ item of work ~ ITFS ~ ITLITP ~ ITPS ~ ITS ~ ITSL ~ ITSO ~ iTSS ~ ITSS ~ ITT ~ ITU ~ ITU-T ~ ITW ~ IV ~ IVPS ~ IVRS ~ IVS ~ IVV ~ IW ~ IWA ~ IWB ~ IWCR ~ IWR ~ IXL ~ IZ

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J

J ~ J door ~ J0 ~ J2 ~ J3 ~ J4 ~ J6 ~ J7 ~ J8 ~ J9 ~ JA ~ jack ~ jack arches ~ jack points ~ jacker packer ~ Jacobs ~ Jaflex clip ~ James, William janglers ~ Jarrah ~ Jarvis ~ Javelin ~ jaw ~ jaw block ~ JB ~ jc. ~ jcn. ~ JCMBPS ~ JCN ~ JCT ~ Jct. ~ JD ~ JDI ~ jenny ~ jerk limit ~ Jessop, William ~ JG ~ JH ~ JI ~ jig ~ jim crow ~ jinney ~ JJA ~ JK ~ JL ~ JLE ~ JN ~ jn. ~ JNA ~ JNAP ~ jnc. ~ JNP ~ JNUP ~ job bank ~ jockey ~ jocko ~ joggle ~ joggled stock rail ~ joggled switch ~ John Bull rail saw ~ joint ~ joint chair ~ joint closure temperature (JCT) ~ joint hopping ~ joint industry cost ~ JOINT INQ ~ joint packing ~ Joint Points Team (JPT) ~ joint railway ~ joint regulating ~ joint sleeper ~ jointed rail ~ jointed track (jtd.) ~ jointed track circuit ~ jointless track circuit (JTC) ~ Joslock ~ Joslock point machine ~ journals ~ journey ~ journey time ~ journey time improvement (JTI) ~ jowling ~ Joy valve gear ~ JP ~ JPIP ~ JPT ~ JRDC ~ JRDWG ~ JRI ~ JRS ~ JRU ~ JS ~ JS1 ~ JS2 ~ JST ~ JT ~ jt. ~ JTC ~ JTD ~ jtd. ~ JTI ~ JTS ~ JTW ~ juice rail ~ juliet ~ jump fishplate ~ jumper ~ jumper cable ~ jumper pit ~ junction ~ junction clearances ~ junction conflict ~ junction direction indicator (JDI) ~ junction fishplate ~ junction indicator (JI) ~ junction layout ~ junction lift fishplate ~ junction margin ~ junction mode ~ junction name board ~ junction names ~ junction occupancy ~ junction railway ~ junction route indicator (JRI) ~ junction route setting (JRS) ~ Junction Screening Tool (JST) ~ junction signal ~ junction vee ~ junctionwork ~ Juniper ~ juridical recording unit (JRU) ~ JV ~ JX

K

K ~ K stock ~ K&BJR ~ K&ESR ~ K&WVR ~ KAM ~ Kango ~ Kango hammer ~ Karri ~ KCA ~ KDC ~ KDR ~ KE ~ Keay ~ keel board ~ keel board sleeper ~ keep ~ keeper flange ~ Kemler panel ~ Kennedy, James S. T., GC ~ Kentish Town accident ~ KER ~ KESS ~ KETS ~ kettle ~ key ~ key a signal to danger ~ key interlocking system ~ key liner ~ key lock (KL) ~ key locking ~ key route strategy (KRS) ~ key strap ~ key token ~ keyed to danger ~ keying hammer ~ keying up ~ keylocks ~ keywood scantlings ~ KGT ~ kgtkm ~ KICC ~ kick boarding ~ kick the quoit ~ kicking ~ kicking strap ~ Kildwick accident ~ kilo ~ kilograms per metre ~ kilometerage ~ kilometre plate ~ kilometre post (KP) ~ kinematic envelope (KE) ~ kinematic gauging ~ kinematic vehicle gauge ~ king ~ king lever ~ king pin ~ king points ~ king post wall ~ King, Railway, the ~ Kings Cross accident ~ kip ~ Kirow ~ Kirow crane ~ kiss and ride ~ kiss bend ~ kissing gates ~ KJA ~ KJT ~ KLD Labs ~ kN ~ KN ~ knee ~ knee brace ~ knee frame ~ knitting ~ Knitting and Springs ~ knob ~ knock out ~ knocking out ~ knuckle (KN) ~ KP ~ KPI ~ KRA ~ KRS ~ KVB ~ KWA ~ Kyanizing

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L

L ~ L stock ~ L/O ~ L/S ~ L/X ~ L&BR ~ L&CR ~ L&E ~ L&LR ~ L&MR ~ L&NWR ~ L&SWR ~ L&Y ~ L&YR ~ L1 ~ L2 ~ L3 ~ L50 ~ L80 ~ Lab x ~ Laboratory x ~ LABP ~ LACER ~ Ladbrooke Grove accident ~ ladder ~ ladder junction ~ ladder track ~ laden spring ~ LADS ~ LAG ~ Lambeth paving ~ Lambeth deterrent paving ~ Lambrigg accident ~ lamp proving ~ lamp repeater ~ Lamprey (ZBO) ~ land clearance ~ land severance ~ landing ~ landslide ~ landslip ~ lap ~ LAP ~ LAPTIS ~ Lardner, Dionysius ~ laser beacon ~ laser dozer ~ laser levelling ~ laser lining ~ Lasersweep ~ Lasersweep survey ~ last mile cost ~ last wheel replacement (LWR) ~ latch ~ LATE CHUNL ~ late current off (LCO) ~ late notice arrangements ~ LATE START ~ late surrender protection ~ LATE TRTS ~ lateral alignment datum ~ lateral resistance (LR) ~ Lateral resistance end plate (LRE, LREP) ~ lateral resistance plate (LRP) ~ lateral ride ~ lateral stability ~ laths ~ LATS ~ lattice girder ~ laughing train ~ launder ~ LAWS ~ lay over ~ lay-by ~ laying in ~ laying out ~ layout ~ layout plan ~ layout risk assessment (LRA) ~ Layout Risk Model (LRM) ~ lazy ~ lazy S ~ LB ~ LB&SCR ~ LBR ~ LBRA ~ LBW ~ LC ~ LC clip ~ LC/LS ~ LCA ~ LCAMS ~ LCB ~ LCC ~ LCCC ~ LCCO ~ LCDT ~ LCH ~ LCM ~ LCO ~ LCP ~ LCR ~ LCS ~ LCTCS ~ LCU ~ LCV ~ LCWS ~ LD ~ LDB ~ LDB-SV ~ LDC ~ LDE ~ LDG ~ LDHS ~ LDHSS ~ LDO ~ LDRP ~ LDT ~ LDTSS ~ LDV ~ LE ~ lead ~ lead emergency driving position ~ lead length ~ lead-off space ~ lead-off timbers ~ leadaway ~ leadaway timber ~ leading cab ~ leading end ~ Leading Trackman ~ leading vehicle ~ leaf ~ leaf fall contamination (LFC) ~ leaf fall neutral zone (LFNZ) ~ leaf fall season ~ leaf fall timetable ~ leaf pier ~ LEAF SLIP ~ leaf springs ~ leaky feeder ~ lean-mix concrete ~ learning the road ~ least restrictive aspect ~ Leatherhead control ~ leaves ~ LEAVES T/C ~ LED ~ LED signal ~ ledge rail ~ LEEC ~ left hand common crossing ~ left hand curve ~ left hand parallel wing (LHPW) ~ left hand rail (LHR) ~ left hand relay ~ left hand running ~ left hand side (LHS) ~ left hand splice (LHS) ~ left hand switch (LHS) ~ left hand switch closed (LHSC) ~ left hand transition rail ~ left hand turnout (LHTO) ~ left hand twist rail ~ leg ends ~ legging ~ Legion ~ legs ~ Leica ~ LEM ~ LEMS ~ length ~ length marking ~ length over all (LOA) ~ length over headstocks (LOH) ~ Lengthman ~ LENNON ~ LEP ~ LEPS ~ Leptospiral Jaundice ~ Leptospirosis ~ LER ~ LES ~ less restrictive aspect ~ lessons learned ~ letter of no objection (LONO) ~ LEU ~ LEV ~ level ~ level 2 ~ level 3 ~ level crossing (LC, LX, LXing) ~ Level Crossing Attendant (LXA) ~ level crossing barriers ~ level crossing box ~ level crossing gates ~ level crossing ground plan ~ Level Crossing Keeper ~ Level Crossing Manager (LCM) ~ level crossing maximum permissible speeds ~ Level Crossing Order ~ level crossing panel ~ level crossing predictor ~ level crossing protection system ~ level crossing surface ~ level crossing warning sign ~ Level Crossings Act 1983 (LCA) ~ level difference ~ level NTC ~ level of service ~ level one exceedence (L1) ~ level survey ~ Level Three ~ level track ~ level transition ~ level transition area ~ level transition border ~ level two exceedence (L2) ~ level x ~ LEVEL XING ~ levelling ~ lever ~ lever badge ~ lever band ~ lever collar ~ lever frame ~ lever lead ~ lever lock ~ lever nomenclature plate ~ lever plate ~ lever tablet ~ lever tail ~ lever worked to maintain locking ~ LEWiS ~ Lewisham accident ~ LF NEUTRAL ~ LFC ~ LFNZ ~ LFPR ~ LGHTNG ~ LGRI1 ~ LGRI2 ~ LGS ~ LGT ~ LGV ~ LHCS ~ LHCV ~ LHPW ~ LHR ~ LHS ~ LHSC ~ LHTO ~ LICB ~ LICC ~ licensed operator ~ Licensing Regulations, the ~ Lichfield Trent Valley accident ~ LiDAR ~ LIFE ~ life saving rules ~ lifeguard ~ LIFT ~ lift bridge ~ lift fishplate ~ LIFT/ESC ~ lifted line ~ lifting ~ lifting and lining ~ lifting and packing ~ lifting on top ~ lifting scheme ~ lifting the protection ~ lifting through ~ lifts ~ ligaments ~ light ~ light diesel (LD) ~ light duties ~ light duty men ~ light electric (LE) ~ light emitting diode signal ~ light engine (LE) ~ light engine syndrome ~ light loco ~ light locomotive ~ light maintenance (LM) ~ Light Maintenance Depot (LMD) ~ light rail (LR) ~ Light Rail Safety and Standards Board (LRSSB) ~ light railway ~ Light Railways Act 1896 ~ light rapid transit (LRT) ~ light steam ~ LIGHTNING ~ lightweight continuous welded rail ~ lightweight CWR ~ lightweight deflectometer (LWD) ~ lightweight signal ~ lightweight track ~ like for like ~ like for like renewal ~ lima ~ LIMBO ~ lime stabilisation ~ Lime Street control ~ limestone ~ limestone ballast ~ limit of authority (LoA) ~ limit of movement authority (LMA) ~ limit of shunt ~ limit of shunt indicator (LOS) ~ limited clearance ~ Limited Shunter ~ limits of deviation (LOD) ~ limits of isolation ~ Limpet (MKA, ZKA) ~ LIMRV ~ line ~ line blockage ~ line blocked (LB) ~ line breaker ~ line capacity ~ Line Clear ~ line clear (LC) ~ Line Clear area ~ Line Clear message ~ Line Clear procedure ~ line clear release ~ line clear verification (LCV) ~ Line Controller ~ line guard ~ line interference monitor (LIM) ~ line isolating unit (LIU) ~ line light ~ line loss ~ line name ~ line of sight (LOS) ~ Line Safe area ~ Line Safe message ~ line side ~ line speed ~ Line Standard ~ line-of-sight distance ~ Linear Asset Decision Support (LADS) ~ lined arch ~ lined tunnel ~ Linemen’s boards ~ liners ~ lineside ~ lineside electronic unit (LEU) ~ lineside fencing ~ lineside movement authority ~ lineside security ~ lineside signalling system ~ lineside signs ~ lineside spares ~ lineside telephone ~ linespeed ~ linespeed handback ~ linespeed improvement (LSI) ~ Ling (ZCO) ~ lining ~ lining chord ~ lining trolley ~ lining wire ~ link ~ link and pin suspension ~ Link-up ~ LINX ~ LIP ~ lipped pad ~ lipping ~ LISM ~ LISN ~ lit ~ Little Red Cable, the ~ Littleboy ~ Litton connectors ~ LIU ~ live ~ live discharge toilet ~ live drop vertical (LDV) ~ live load ~ live part ~ live rail ~ Lizard ~ LJU ~ LKT ~ LL ~ Llantarnum type bridge ~ LLAU ~ LLFA ~ LLPA ~ LM ~ LM&SR ~ LMA ~ LMC ~ LMD ~ LMDSM ~ LMR ~ LMSR ~ LMW ~ LN ~ LNER ~ LNEZ ~ LNSD ~ LNW ~ LNW113 ~ LNWR ~ LO ~ LoA ~ LOA ~ load bank ~ load examination ~ load examined ~ load examiner ~ load factor ~ LOAD INCDT ~ loader wagon ~ Loadhaul ~ loading / unloading indicators ~ loading dock ~ loading gauge ~ loading slip ~ Lobster (ZVV) ~ LOC ~ loc. ~ loc. area plan ~ loc. case ~ loc. case platform ~ loc. case suite ~ loc. suite ~ LOC&PAS ~ LOC&PAS TSI ~ local ~ local control ~ local control panel (LCP) ~ local control unit (LCU) ~ local control workstation (LCWS) ~ Local Door ~ local earth ~ local emergency power supply (LEPS) ~ Local Information Control Centre (LICC) ~ local instructions ~ local isolation ~ local isolation instructions ~ local knowledge ~ local line ~ Local Operations Manager (LOM) ~ local override control (LOC) ~ local panel ~ local passenger train ~ local scour ~ local train ~ local working instructions ~ locally controlled manned level crossing (LC) ~ location (Loc.) ~ location area plan (LAP, loc. area plan) ~ location case (loc. case) ~ location case platform (loc. case platform) ~ Location Reference Drawing (LRD) ~ LOCIP ~ Lock ~ lock and block ~ lock slide ~ lock stretcher ~ lock stretcher bar ~ Lock, Block and Brake ~ Locke, Joseph ~ locked ~ locked wheel ramp ~ locking ~ locking actuator ~ locking bar ~ locking chart ~ locking fitter ~ locking frame ~ locking hook ~ locking level ~ locking level release ~ locking room ~ locking shelf ~ locking slides ~ locking tray ~ Lockington accident ~ lockout ~ lockout system ~ lockspike ~ loco ~ LOCO ~ loco shed ~ locomotive ~ locomotive class ~ locomotive engine ~ locomotive hauled ~ locomotive hauled coaching stock (LHCS) ~ locomotive hauled set ~ locomotive shed ~ LOD ~ log book ~ LOGOLD ~ LOH ~ LOI ~ LOLER ~ LOM ~ London ~ London & North Eastern Railway (LNER) ~ London and Continental Railways (LCR) ~ London and South East operators ~ London end (LE) ~ London Midland ~ London Midland & Scottish Railway (LM&SR, LMSR) ~ London Midland Region (LMR) ~ London North Eastern Railway ~ London Overground (LO) ~ London Overground Rail Operations Ltd. (LOROL) ~ London side (L/S, LS) ~ London Transport (LT) ~ London Underground (LU) ~ London Underground Combined Access System (LUCAS) ~ London Underground Limited (LUL) ~ London Underground line ~ lone working ~ long base versine error ~ long bearers ~ long distance operators ~ long earth ~ long end ~ long rail ~ long route ~ long section ~ long section token ~ long span underline bridge ~ long timbers ~ long tom ~ long wavelength corrugations ~ long welded rail (LWR) ~ long welded rail destressing key ~ long welded rail train (LWRT, LWR Train) ~ long wheelbase ~ longitudinal change of section ~ longitudinal levels ~ longitudinal profile ~ longitudinal section ~ longitudinal timber (LGT) ~ LONGLO ~ LONO ~ Lookout (LO, L/O) ~ Lookout operated warning system (LOWS) ~ Lookout warning ~ Lookoutman ~ loop ~ loop dropper ~ loop exit signal ~ loop line ~ loose coupled ~ loose heel switch ~ loose shunting ~ loose sleeper beam ~ loose sleeper relaying (LSR) ~ LOOU ~ LOP ~ LOPI ~ LOR ~ Loram ~ LOROL ~ LOS ~ LoS ~ loss of bottom signal ~ loss of survival space ~ lost customer hours (LCH) ~ lost motion ~ LOSTAT ~ LOTL ~ LOTRAIN ~ Loudaphone ~ low ~ low carbon austenitic manganese steel rail (LCAMS) ~ LOW CLASS ~ low cost clip (LC clip) ~ low joint ~ low leg ~ low level ~ low negative shoe detector (LNSD) ~ low rail (LR) ~ low rail design ~ low rail wear ~ low rail wheel squeal ~ low ride ~ low ride RRV ~ low risk failure ~ low ropes ~ low speed ramp ~ low speed signal ~ low track fixity ~ low track force (LTF) ~ low vibration track (LVT) ~ low-floor tram ~ lower fillet ~ lower fishing surface ~ lower quadrant signal (LQ) ~ lowerings ~ Lowmac ~ LOWS ~ LPT ~ LPTB ~ LQ ~ LR ~ LR55 ~ LR55 Rail ~ LRA ~ LRAS ~ LRBG ~ LRCL ~ LRE ~ LREP ~ LRM ~ LRP ~ LRPC ~ LRR ~ LRSSB ~ LRT ~ LRU ~ LRV ~ LS ~ LS chairscrew ~ LSC ~ LSE ~ LSF0H ~ LSI ~ LSIG ~ LSL ~ LSP ~ LSR ~ LSS ~ LSSE ~ LSSG ~ LSVG ~ LSZH ~ LT ~ LT&SR ~ LTA ~ LTB ~ LTC ~ LTE ~ LTF ~ LTF25 ~ LTI ~ LTM ~ LTP ~ LTPP ~ LTS ~ LTT ~ LTUC ~ LU ~ LUCAS ~ Lucy ~ LUGGAGE 1 ~ LUGGAGE 2 ~ LUJR ~ LUL ~ LUL CAUSES ~ LUL Group ~ LUL Line ~ LUL S3 ~ lumen ~ luminance ~ luminous flux ~ luminous intensity ~ Lunan Bay accident ~ lunars ~ LURS ~ LUSEA ~ luting sand ~ LV ~ LVDC ~ LVDT ~ LVT ~ LW ~ LWD ~ LWR ~ LWR train ~ LWRT ~ LX ~ LX chairscrew ~ LXA ~ LXing ~ LXRAM ~ LXRMT ~ LZB

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M

M ~ M chairscrew ~ M door ~ M stock ~ M-C ~ M&C ~ M&CR ~ M&E ~ M&EE ~ M&GNR ~ M&R ~ M&SWR ~ M0 ~ M1 ~ M2 ~ M7 ~ M8 ~ M9 ~ MA ~ MAA ~ MABC ~ MABEL ~ Macbeth spike ~ Machine Controller (MC) ~ machine mounted short circuiting device (MMSCD) ~ Machine Operator ~ Mackenzie, William ~ Mackerel (ZMV) ~ MADD box ~ MAF ~ MAFA ~ MAFEA ~ MAFF ~ magic carpet ~ MAGLEV ~ magnet ~ magnetic braking ~ magnetic particle inspection (MPI) ~ mail train ~ main and tail haulage ~ main arm ~ main aspect ~ main cable ~ main girders ~ main line ~ main lines main reservoir cock ~ main reservoir pipe ~ main route ~ main route aspect free (MAF) ~ main route aspect release from double yellow (MAYY) ~ main route aspect release from red (MAR) ~ main route aspect release from yellow (MAY) ~ main signal ~ main steel ~ Mainline ~ mainline railway ~ maintained locking ~ maintainer ~ maintainer’s panel ~ maintainer’s terminal ~ maintenance ~ maintenance ballast ~ maintenance chairscrew ~ maintenance coil ~ Maintenance Delivery Unit (MDU) ~ maintenance depot ~ maintenance facility classification ~ maintenance facility classification Fx ~ maintenance holidays ~ maintenance lifts ~ maintenance lining ~ maintenance scheduled task (MST) ~ maintenance screwspike ~ maintenance speed ~ maintenance stone ~ maintenance tamping ~ MAIS ~ major cycle ~ major feeding diagram (MFD) ~ major injury ~ major project notice (MPN) ~ major station ~ make up time ~ malleable iron ~ MAMS ~ managed track position ~ Manhattan skyline ~ manned level crossing (LC) ~ MANOP ~ Mansell wheel ~ Manta (YKA) ~ manual level transition ~ manual point ~ manual recording point ~ manual points ~ manual route setting ~ manual SDO ~ manual selective door opening ~ manual sluing ~ manually adjust points ~ manually applied earth ~ manually controlled barriers – on call (MCB-OC) ~ manually controlled barriers (MCB) ~ manually controlled gated crossing ~ manually controlled gates (MGH) ~ manufacturers’ drawings ~ MAP ~ map search ~ MAR ~ MARA ~ MARC ~ MARCO ~ Marey chart ~ margin ~ margin book ~ marginal ~ MARI ~ mark ~ mark 1, 2, 3, 3a, 3b, 4 ~ mark I, II, III, IIIA, IIIB, IIIC ~ mark of coaching stock ~ mark of overhead contact system (OCS) ~ marker board ~ marker lights ~ marker plate ~ marking up ~ MARLIN ~ Marlin (YKA) ~ MARPAS ~ marshalling sidings ~ marshalling yard ~ martensite ~ Martin, Albinus ~ mary ~ MAS ~ mass detector ~ mast ~ master bonding plan ~ master control switch (MCS) ~ master controller ~ master record ~ master switch ~ match wagon ~ material train mathematical switch toe ~ mathematical toe ~ Matisa ~ Matisa automatic ballast cleaner (MABC) ~ Matisa ballast cleaner (MBC) ~ Matisa curve corrector ~ Matisa track recording trolley (MTRT) ~ MAU ~ MAV ~ Maximo ~ Maximu ~ maximum axle load ~ maximum control speed ~ maximum permissible speed ~ maximum permitted crossing speed ~ maximum permitted speed ~ maximum rail temperature (MRT) ~ maximum safe speed (MSS) ~ maximum speed (Vm) ~ MAY ~ May peak ~ MAYY ~ MB ~ MBC ~ MBJT ~ MBLS ~ MBO ~ MBRSM ~ MBS ~ MBSO ~ MC ~ MCB ~ MCB-CCTV ~ MCB with CCTV ~ MCB-OC ~ MCBF ~ MCCB ~ MCG ~ McK&H ~ MCM ~ McNulty Report, the ~ MCS ~ MD ~ MD&HB ~ MDA ~ MDBF MDBM ~ MDF ~ MDL ~ MDU ~ MDUM ~ ME ~ measure both ways ~ measured shovel packing (MSP) ~ measurement and compensation (M&C) ~ measuring track circuit ~ mechanical cab signalling ~ mechanical interlocking ~ mechanical locking ~ mechanical locking chart ~ mechanical points ~ mechanical signal box ~ mechanical signalling ~ mechanical switches ~ mechanically independent registration (MIR) ~ mechanised maintenance ~ mechanised maintenance envelope (MME) ~ Medium Output Ballast Cleaner (MOBC) ~ medium track fixity ~ medscreen ~ meetings ~ MEF ~ Megafret ~ MEL ~ Mendip Rail ~ mental model ~ MENTOR ~ Mephisto ~ Merdog (ZFV) ~ Meridian ~ MERIT ~ MERITS ~ Mermaid (ZJV) ~ MERMEC ~ merry-go-round loop (MGR loop) ~ merry-go-round train (MGR train) ~ merry-go-round wagon (MGR wagon) ~ Merseyrail ~ Merseytravel ~ mess coach ~ mess van ~ messenger wire ~ MET ~ metal Mickey ~ metals ~ method of working document ~ method statement ~ Metospir strip ~ metre opening ~ metreage ~ metreage barrier ~ metro ~ Metro ~ Metro-Cammell (M-C) ~ Metronet Rail Limited ~ MEWP ~ MF ~ MF ~ MF anchor ~ MFA ~ MFAS ~ MFBV ~ MFBW ~ MFC ~ MFD ~ MFM ~ MFSDD ~ MG ~ MGE ~ MGH ~ MGI ~ MGL ~ MGL pin ~ MGL studs ~ MGR ~ MGR train ~ MGR Loop ~ MGW ~ MHA ~ MHH ~ MHH rail ~ MHSAW ~ MHSW ~ MHSWR ~ MHT ~ MI ~ MICE ~ MICR ~ micro buffet ~ mid point connection (MPC) ~ mid-platform signal ~ mid-point anchor (MPA) ~ mid-rail ~ mid-span ~ mid-span offset (MSO) ~ middle block ~ middle road ~ middle road block ~ Midland Main Line (MML) ~ Midlands Engine for Growth ~ midnight ~ Mids. ~ midway lock ~ midway release ~ migration ~ mike ~ mile ~ mileage ~ mileage yard ~ milepost (MP) ~ milepost sequence change ~ military trestle ~ mill heat treated (MHT) ~ mill heat treated rail (MHT rail) ~ Millican nail ~ millirad ~ Mills ~ Mills baseplate ~ Mills rail clip (MRC) ~ Mills, Jack ~ MIMC ~ mimic diagram ~ mimic panel ~ MIMS ~ mine railway ~ mined tunnel ~ mineral ~ minerals ~ mineral extraction ~ Mini MARPAS ~ Mini MIMS ~ mini vest ~ miniature alphanumeric route indicator (MARI) ~ miniature arm ~ miniature buffet ~ miniature indicator (MI) ~ miniature lever frame ~ miniature railway ~ miniature red / green lights ~ miniature red / green warning lights (R/G) ~ miniature route indicator (MRI) ~ miniature snow plough (MSP) ~ miniature stop lights (MSL) ~ miniature warning lights (MWL) ~ minimum ballast depth ~ minimum flangeway ~ minimum length ~ minimum radius ~ minimum rail depth ~ minimum rail length ~ minimum rail temperature (MRT) ~ minimum reading distance (MRD) ~ minimum reading time (MRT) ~ minimum warning time ~ minimum works alteration (MWA) ~ Mining Engineer (ME) ~ MiniProf ~ Minnow (ZCO) ~ minor cycle ~ minor injuries ~ minor obstacle deflector ~ MINT ~ MIP ~ MIPS ~ MIR ~ MIRO MIRSE ~ MIS-INVEST ~ MISC OBS ~ miscommunication ~ misjudgement ~ misread ~ MISS ~ mission ~ Mitchell, Joseph ~ MITTE ~ MIU ~ mixed gauge track ~ mixed traffic ~ mixed train ~ MJR ~ MKA ~ MKS ~ ML ~ MLA ~ MLD ~ MLF ~ MLFIC ~ MLIC ~ MLRI ~ MLSO ~ MLV ~ MLW ~ MM ~ MMA ~ MMA x ~ MME ~ MMI ~ MML ~ MMLE ~ MMRM ~ MMSCD ~ MMURTU ~ MN ~ MOA ~ MOABS ~ MOBC ~ mobile elevating work platform (MEWP) ~ mobile flash butt welder (MFBW) ~ Mobile Operations Manager (MOM) ~ mobile shunter ~ MOD ~ mod. ~ mod. sheet ~ mod. state ~ modal split Modane accident ~ mode A train radio ~ mode x startup ~ model railway ~ modern equivalent form (MEF) ~ Modernisation Plan, the ~ modification sheet ~ modification status (mod state) ~ modifications (mods) ~ mods ~ modular buffet ~ modular control system (MCS) ~ modular S&C ~ modular signalling ~ modular station ~ modular switch and crossing (modular S&C) ~ modular switch and crossing layouts (modular S&C layouts) ~ MOF ~ MOIRA ~ MOLA ~ Mole, the ~ MOM monitor roof ~ monitored ~ monitoring point ~ monkey ~ monobloc monoblock sleeper ~ monoboom anchor portal ~ monorail ~ Monte Carlo simulation ~ monument ~ Moorgate accident ~ Moorgate control MOP ~ MORANE ~ more restrictive aspect ~ Moreton-on-Lugg accident ~ Moreton-on-Lugg controls ~ Morpeth accidents ~ Morpeth board ~ MOS ~ mosaic panel ~ mosaic tile ~ MoSCoW ~ MOSELLE ~ most restrictive aspect ~ most restrictive speed profile (MRSP) ~ mothballed line ~ motion motive power ~ motive power depot (MPD) ~ motive power unit (MPU) ~ motor ~ motor blowers ~ motor coach ~ motor operated ~ motor operated switch (MOS) ~ motor points ~ motor worked ~ Motorail ~ Motorail train ~ motorised switch ~ Motorman ~ Mott MacDonald Ltd. (MM, MML) ~ MoU ~ mouseholes ~ movable angles ~ movable bridge ~ movable crossing ~ movable elbows ~ movable infrastructure ~ movable length ~ move ~ movement ~ movement authority (MA) ~ Movements Inspector ~ moving block ~ moving block signalling ~ MP ~ MP&I ~ MPA ~ MPATS ~ MPC ~ MPD ~ MPDC ~ MPG ~ mph ~ MPI ~ MPK ~ MPLS ~ MPM ~ MPN ~ MPS ~ MPT ~ MPTA ~ MPTC ~ MPTE ~ MPTSC ~ MPTSL ~ MPU ~ MPV ~ MPWI ~ MR ~ MRA ~ MRB ~ MRBS ~ MRC ~ MRD ~ MRE ~ MRI ~ MRP ~ MRR ~ MRSP ~ MRT ~ MRV ~ MS ~ MSAP ~ MSC ~ MSD ~ MSE ~ MSIL ~ MSIP ~ MSJ&AR ~ MSL ~ MSLR ~ MSO ~ MSP ~ MSRB ~ MSRP ~ MSRS ~ MSS ~ MSSCC ~ MST ~ MT ~ MT/276 examination schedule ~ MT700 ~ MTA ~ MTB ~ MTBF ~ MTBFF ~ MTBHE ~ MTBSF ~ MTBWSF ~ mtce. ~ MTDS ~ MTL ~ MTM ~ MTP ~ MTPA ~ MTPAS ~ MTRT ~ MTTF ~ MTTR ~ MTTRS ~ MTTS ~ MTU ~ MU ~ mu (µ) ~ MU train ~ MUBV ~ muckle bolt ~ MUCs ~ Mullet (YLA) ~ multi-groove locking (MGL) ~ multi-groove locking pin (MGL pin) ~ multi-groove locking stud (MGL Stud) ~ multi-lamp route indicator (MLRI) ~ multi-position key (MPK) ~ multi-processor module (MPM) ~ multi-purpose vehicle (MPV) ~ multi-section ~ multi-SPAD signal ~ multi-strike bridge ~ multi-track ~ multi-track railway ~ MultiEst ~ Multifret ~ multiple aspect signalling (MAS) ~ multiple track railway ~ multiple unit (MU) ~ multiple unit class ~ multiple unit train (MU train) ~ multiple working ~ MUR ~ Muscleman ~ mushroom ~ mushrooming ~ MUTCD ~ mutual screening conductor (MSC) ~ MV ~ MVAIR ~ MVB ~ MVDC ~ MVLC ~ MW ~ MW ~ MWA ~ MWD ~ MWL ~ MWN ~ MWO ~ MWU ~ MY ~ MZ

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N

N ~ N value ~ N/B ~ N&BR ~ N&SJR ~ N&SWJR ~ N&VMP ~ NA ~ Nabla ~ Nadal formula ~ Nairns accident ~ Nairns Programme ~ NALCO ~ NAPS ~ NaPTAN ~ narrow angle crossing ~ narrow gauge railway ~ narrow gauge track ~ NASR ~ NAT ~ National Bearer Network (NBN) ~ National Competency Control Agency (NCCA) ~ National Delivery Service (NDS) ~ National Electronic Sectional Appendix (NESA) ~ National Express East Anglia (NXEA) ~ National Hazard Directory (NHD) ~ national incident report (NIR) ~ National Infrastructure Database (NID) ~ national location code (NLC) ~ National Network, the ~ national operating procedures (NOP) ~ National Operating Strategy (NOS) ~ national public transport access nodes (NaPTAN) ~ National Radio Network (NRN) ~ National Railway Museum (NRM) ~ National Railway Network (NRN) ~ National Records Group (NRG) ~ National Registration Entity (NRE) ~ national reservation system (NRS) codes ~ national route code (NRC) ~ National Safety Authority (NSA) ~ national safety rule (NSR) ~ National Seasonal Infrastructure Treatment Plan ~ national signalling system ~ National SPAD Focus Group (NSFG) ~ National System Operator (NSO) ~ national technical rule (NTR) ~ national trackside equipment ~ national train control (NTC) ~ national train protection equipment ~ national value (NV) ~ National Vehicle Register (NVR) ~ Nationalisation ~ nationally significant infrastructure project (NSIP) ~ NATM ~ Natrasolve ~ natural ~ natural angle ~ natural crossing ~ natural rubber ~ natural slope ~ natural stressing ~ natural turnout ~ NAU ~ NAWR ~ NB ~ NBA ~ NBDR ~ NBN ~ NBR ~ NBS ~ NBSI ~ NBT ~ NC ~ NCAP ~ NCB ~ NCC ~ NCCA ~ NCHSR ~ NCL ~ NCM ~ NCN ~ NCR ~ NCRG ~ NCT ~ NCU ~ NDA ~ NDAD ~ NDC ~ NDE ~ NDF ~ NDM ~ NDN ~ NDS ~ NDSD ~ NDT ~ near miss ~ nearest open line ~ nearest rail ~ nearside ~ NEBOSH ~ NECC ~ neck ~ neck block ~ NED ~ needle indicator ~ NEG ~ negative cant ~ negative cant deficiency ~ negative conductor rail ~ negative conductor rail pedestal ~ negative coper overhang ~ negative feeder ~ negative mileage ~ negative rail ~ negative shoe ~ negative splay ~ negative stagger ~ neggy rail ~ negligible risk failure ~ neighbour notifications ~ nellie ~ NEM ~ NEMA ~ NEMOL ~ NEP ~ NEPA ~ NEPTUNE ~ NEQ ~ NER ~ NESA ~ nest of eggs ~ nested coil springs ~ NET ~ NETF ~ NETRAFF ~ Network Certification Body (NCB) ~ Network Change ~ Network Code ~ Network Management Centre (NMC) ~ Network Management Statement (NMS) ~ network modelling framework (NMF) ~ Network Rail ~ Network Rail business process documents ~ Network Rail company standards (NRCS) ~ Network Rail connecting network ~ Network Rail controlled infrastructure (NRCI) ~ Network Rail Design Delivery (NRDD) ~ Network Rail Infrastructure Ltd. (NRIL) ~ Network Rail Ltd. (NR) ~ Network Rail managed infrastructure (NRMI) ~ Network Rail managed stations ~ Network Rail Online Logistics (NROL) ~ Network Rail Property ~ Network Rail Regions ~ Network Rail Routes ~ Network Rail Routes (cont) ~ Network Rail standard ~ Network Rail Telecommunications (NRT) ~ Network South East (NSE) ~ network terminal ~ Network, the ~ Networker ~ Networker Turbo ~ neutral relay ~ neutral section (NS) ~ neutral temperature ~ new ~ new line ~ New Measurement Train (NMT) ~ new notice case ~ new OCS ~ new overhead contact system ~ New Track Construction (NTC) Machine ~ new working timetable ~ Newcastle chaldron ~ Newcastle road ~ Newcastle wagon way ~ newel ~ Newlands, Alexander ~ Newton accident ~ Nexus ~ NFDC ~ NFF ~ NFM ~ NFRIP ~ NG ~ NGP ~ NGT ~ NHCT ~ NHD ~ NHDMT ~ NHEA ~ NHMP ~ NHU ~ nibs ~ NICC ~ nicknames ~ NICS ~ NID ~ Night Caps ~ night time quiet period (NTQP) ~ Night Tube ~ Nightly Engineering Protection Arrangements (NEPA) ~ NILE ~ NIMBY ~ NIMU ~ nine foot rule ~ Nipper ~ nips ~ NIR ~ NIRM ~ NIROC ~ NIRU ~ NIS ~ NITHC ~ NKL ~ NL ~ NL mode ~ NLC ~ NLCSG ~ NLL ~ NLR ~ NLRIP ~ NLU ~ NLXSG ~ NM ~ NMC ~ NMF ~ NMP ~ NMS ~ NMSI ~ NMT ~ NNS ~ NNTRs ~ NO ~ no block ~ no block line ~ no heat ~ no out of turn (NOOT) mode ~ NO PNT HTR ~ no power mode (NP) ~ no refuges ~ no Signaller key token (NSKT) ~ no Signaller token (NST) ~ no Signaller token remote ~ no Signaller token with remote crossing loops (NSTR) ~ NO T/CREW ~ no train period (NTP) ~ no volts relay ~ no-fines concrete ~ no-volt relay ~ no.x end ~ no.x end cab ~ NoBo ~ NOC ~ nodding dogs ~ nodding donkeys ~ NoL ~ nominated location ~ Nominated Person (NP) ~ Nommy ~ NON NR INF ~ non-adjustable stretcher bar ~ non-ballasted track (NBT) ~ non-block signal ~ non-compliance (NC) ~ non-core network ~ non-core possession ~ non-cyclic task ~ non-disruptive change ~ non-driver’s side ~ non-driving ~ non-electrified line ~ non-franchisable ~ non-gauge face ~ non-illuminated diagram ~ non-intersecting switch ~ Non-intrusive Crossing System (NICS) ~ non-leading mode (NL) ~ non-multi ~ non-nose common crossing ~ non-operational property ~ non-passable ~ non-passable signal ~ non-passenger stock (NPS) ~ non-route-setting NX (NRNX) hybrid ~ non-running movement ~ non-running rail ~ non-safety related ~ non-standard differential speed restriction ~ non-standard differential warning indicator ~ non-standard four-aspect sequence ~ non-stick signal ~ non-track circuited line ~ non-vital ~ NONDOO STN ~ NOP ~ NORD-LOCK ~ normal (N) ~ normal aspect ~ normal clearance ~ normal control ~ normal direction ~ normal grade ~ normal grade rail (NG) ~ normal mode ~ normal operation ~ normal passing clearance ~ normal platform clearance ~ normal structure clearance ~ normal ventilation system (NVS) ~ normalise ~ North Eastern electrical cab signalling ~ North Eastern Region (NER) ~ Northampton accident ~ Northampton lock ~ Northern ~ Northern Powerhouse ~ Northern Powerhouse Rail (NPR) ~ Northern Rail ~ Northern Spirit ~ Northern Way ~ Norton Fitzwarren accident ~ NOS ~ nose ~ nose block ~ nose drop ~ nose hung ~ nose to intersection point ~ nose to intersection point dimension ~ nose to IP ~ nose to knuckle ~ nose to knuckle dimension ~ nose to nose ~ nose to nose dimension ~ nose wear ~ nosing ~ nosing force ~ not in regular use (NIRU) ~ not to be moved ~ not to be reloaded ~ notch ~ notch down ~ notch up ~ notching relay ~ Notice, the ~ notices ~ Notified Body (NoBo) ~ Notified National Technical Rules (NNTR) ~ Nova ~ Nova x ~ Nova one ~ Nova three ~ Nova two ~ november ~ NP ~ NP mode ~ NPCCS ~ NPI ~ NPM ~ NPMEA ~ NPP ~ NPPR ~ NPR ~ NPS ~ NPT ~ NPU ~ NPW ~ NQ ~ NR ~ NR CONTROL ~ NR FIRE ~ NR SCT ~ NR&EE(T) ~ NR3189 ~ NR4 ~ NR56V ~ NR60 ~ NR60I ~ NR60V ~ NRA ~ NRAB ~ NRB ~ NRC ~ NRCC ~ NRCI ~ NRCOC ~ NRCS ~ NRDD ~ NRDF ~ NRES ~ NRG ~ NRHS ~ NRI ~ NRIC ~ NRIF ~ NRIL ~ NRLS ~ NRM ~ NRMI ~ NRN ~ NRNA ~ NRNX ~ NROL ~ NRP ~ NRPS ~ NRS ~ NRSC ~ NRSWA ~ NRT ~ NRTD ~ NRTS ~ NRVCG ~ NR x ~ NS ~ NS&P ~ NSA ~ NSAC ~ NSARE ~ NSC ~ NSDG ~ NSE ~ NSFG ~ NSIP ~ NSIT ~ NSKT ~ NSO ~ NSPSG ~ NSPWG ~ NSR ~ NSRL ~ NSRP ~ NST ~ NSTR ~ NSW ~ NSZ ~ NT ~ NTAPM ~ NTAR ~ NTC ~ NTI ~ NTM ~ NTN ~ NTP ~ NTPD ~ NTPO ~ NTR ~ NTRU ~ NTS ~ NU ~ NUCKLE ~ nucleus ~ NUJR ~ Nuneaton accident ~ NUS ~ NUTS ~ NUTS x ~ nuttex ~ NVC ~ NVR ~ NVS ~ NW ~ NWEP ~ NWML ~ NWNG ~ NWPTUF ~ NWR ~ NWRR ~ NWT ~ NWZ ~ NX ~ NX double-button (NX(DB)) ~ NX key-switch (NX(KS)) ~ NX panel ~ NX push-push (NX(PP)) ~ NX turn-push (NX(TP)) ~ NX(DB) ~ NX(KS) ~ NX(PP) ~ NX(TP) ~ NXEA ~ NXEC ~ NXMM ~ NXWM ~ NY ~ nylon ~ NYMR

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O

O ~ O carded ~ O Stock ~ O-D matrix ~ O/B ~ O&AT ~ O&IJR ~ O&M ~ OA ~ OA&GBR ~ Oakes, Wallace Arnold, GC ~ OAO ~ OB ~ OBCU ~ OBS ~ obscuration ~ observation coach (OBS) ~ observation saloon ~ obstacle deflector ~ obstacle detection ~ obstacle detection system ~ obstructed ~ obstruction ~ obstruction danger ~ obstructionless ~ obstructionless lever ~ obstructionless rail lubricator ~ obstructionless stressing equipment ~ obtuse crossing ~ obtuse crossing point rail ~ obtuse crossing wing rail ~ obtuse crossing, parts of ~ OC ~ OCAM ~ OCB ~ OCC ~ Occ. ~ occlusion ~ occupation ~ occupation bridge ~ occupation crossing ~ occupation level crossing (OLC) ~ occupied ~ occupied line ~ occupied section ~ occurrence book ~ OCL ~ OCLZ ~ OCP ~ OCR ~ OCS ~ OCS gantry ~ OCS mast ~ OCS portal ~ OCS structure ~ OCS panel ~ Octopus (YDA) ~ Octopus train ~ OCU ~ OD ~ ODA ~ ODF ~ ODIL ~ ODM ~ ODN ~ ODO ~ odometry ~ odometry error ~ ODR ~ ODS ~ ODTT ~ OE ~ OEE ~ OEIS ~ OEL ~ OEM ~ OEO ~ OES ~ OETR ~ OFAF ~ off ~ off aspect ~ off indicator ~ off shed ~ off side ~ off the back ~ off the inside ~ off the rails ~ off the road ~ off the street ~ off-network terminal ~ off-track ~ Off-track Inspector ~ Off-track Maintenance ~ off-tracking ~ offered ~ offered on ~ offering ~ Office of Rail and Road (ORR) ~ Office of Rail Regulation (ORR) ~ Office of the Rail Regulator (ORR) ~ Officer’s saloon ~ Officer’s special ~ offset (O) ~ OFFSET ERR ~ offset signal offset stick ~ OFG ~ OG ~ OGL ~ OGLO ~ OH ~ OH&P ~ OHIO ~ OHL ~ OHL/3 RAIL ~ OHLE ~ OHNS ~ OI ~ OIS ~ OJ ~ OJEC ~ OK ~ OL ~ OLB/EFR ~ OLBI ~ OLC ~ old hand ~ Old Kent Road control ~ old line ~ OLE ~ OLE gantry ~ OLE mast ~ OLE pole ~ OLE portal ~ OLE structure ~ OLEAR ~ OLEC ~ OLEMI ~ OLGA ~ OLIVE ~ oliver ~ OLM ~ OLP ~ OLT ~ OM ~ OM&R ~ OMA ~ Omnia ~ omnibus telephone ~ omnibus telephone circuit ~ Omnicom ~ OmniSurveyor3D ~ OMR ~ ON ~ On ~ on aspect ~ on indicator ~ on/off indicator ~ ON OHL ~ on or near the line ~ on shed ~ on sight ~ on sight mode (OS) ~ on the approach ~ on the approach side ~ on the approach to ~ on the block ~ on the DC ~ on the deck ~ on the floor ~ on the lineside ~ on the stops ~ on track ~ on track machine (OTM) ~ on track plant (OTP) ~ on track plant depot (OTPD) ~ on train data recorder (OTDR) ~ on train data recording ~ on train monitoring recorder (OTMR) ~ on train monitoring and recording ~ ON-TRACK ~ on-track machine ~ on-track plant ~ On-track Plant Operations Scheme (POS) ~ on-track ~ on-tracking ~ ONAN ~ onboard train protection system ~ one control switch (OCS) ~ one control switch panel (OCS panel) ~ one diesel in derv ~ one engine in steam ~ one in ~ one on ~ one pull ~ one rail only (ORO) ~ one shot ~ one shot crucible ~ one shot sanders ~ one train in steam ~ one train release ~ one train staff instrument ~ one train working (OTW) ~ one train working by train staff (OT(S)) ~ one train working without train staff (OT) ~ one under ~ one way lever ~ one way switch ~ Ongars ~ ONTRK DMG ~ OOARL ~ OOC ~ OOCPA ~ OOG ~ OOGLI ~ OOO ~ OOR ~ OOS ~ OOTH ~ OOU ~ OP ~ OPAS ~ OPC UA ~ open ~ Open Access (OA) ~ Open Access operator (OAO) ~ open block ~ open coach ~ open crossing ~ open level crossing (OC) ~ open line ~ open switch ~ open wagon ~ opened out double junction ~ opening out ~ opens ~ operate ~ operated ~ Operating Department (OD) ~ Operating Department Supervisor (ODS) ~ operating floor ~ operating irregularity ~ operating mode speed limit ~ operating notice ~ operating notice diagram ~ operating publication ~ operating speed ~ Operation Skyhawk ~ operation time ~ operational close call (OCC) ~ operational information system (OIS) ~ operational irregularity ~ operational layout ~ operational platform length ~ operational property ~ operational railway ~ operational telephone ~ operational use ~ operationally equivalent ~ operationally meaningful ~ Operations ~ Operations Control ~ Operations Focus Group (OFG) ~ Operations Planning (Ops. Planning) ~ Operator ~ operator’s control unit (OCU) ~ Operator’s cupboard ~ OPEX ~ OPI ~ OPM ~ OPO ~ OPO(T) ~ Oppenheim Report, the ~ OPPOS ~ opposing locking ~ opposite flexure ~ opposite flexure turnout ~ OPR ~ OPRAF ~ OPS ~ Ops. ~ Ops. Planning ~ OPSRAM ~ Opsweb ~ OPTG OTHER ~ OPTG STAFF ~ optic diode signal ~ optimism bias (OB) ~ option selection ~ OPU ~ OPUG ~ OQ ~ OR ~ ORA ~ ORAM ~ orange pipe ~ Orange Sidings ~ orange sleeve ~ orange square ~ orange star ~ orange vest ~ ORBIS ~ ORBITA ~ ORCATS ~ ORCC ~ order of pulling ~ order to move ~ ordinary acting relay ~ ordinary joint ~ Ordnance datum (OD) ~ ORE ~ ORFEUS ~ ORIAN ~ orientation of close viewing sector ~ ORN ~ ORO ~ OROR ~ OROR possession ~ OROTR ~ OROTR possession ~ ORR ~ ORS ~ orthotropic deck ~ OS ~ OS mode ~ OS3D ~ OSA ~ OSART ~ OSBM ~ oscar ~ OSD ~ OSDIL ~ OSEC ~ OSG ~ OSGB ~ OSGB36 ~ OSGR ~ OSI ~ OSL ~ OSL Rail ~ OSLO ~ OSMR ~ OSNOR ~ OSP ~ OSP&I ~ OSPF ~ Osprey (YKA) ~ OSRPA ~ OSS ~ OSS+ ~ OSTI ~ OSTO ~ OT ~ OT(S) ~ OTDR ~ OTH BIRDS ~ OTH EXC ~ OTIF ~ OTM ~ OTMDO ~ OTMR ~ OTP ~ OTPD ~ OTROTR ~ OTT ~ OTTC ~ Otter (YXA) ~ OTW ~ OTX ~ OU ~ out ~ out of correspondence ~ out of gauge (OOG) ~ out of gauge rail ~ out of running (OOR) ~ out of running wire ~ out of service ~ out of square ~ out of station interchanges (OSI) ~ out of synchronisation ~ out of traffic hours (OOTH) ~ out of turn working ~ out-of-service lock ~ outer distant signal ~ outer home signal ~ outer rail (OR) ~ outer tell tales (OTT) ~ outer tread ~ outer wheelbase (OWB) ~ outfall ~ outgoing feeder (OF) ~ outline design ~ outline project specification (OPS) ~ output definition (OD) ~ Outram Way ~ Outram, Benjamin ~ outside ~ outside a signal ~ outside door indicator lights (OSDIL) ~ outside edge (OE) ~ outside guard rail(s) ~ outside party (OP) ~ outside rail ~ outside rules ~ outside rules possession ~ outside slip ~ outside the Rules of the Route (OROR, OROTR) ~ outside the Rules of the Route possession ~ OV ~ OVER CRWD ~ over end ~ over end relaying ~ over the short end ~ over the top cantilever (OTTC) ~ over track crossing (OTX) ~ overbolt ~ overbridge (OB) ~ overcharge, to ~ overcharge brakes, To ~ overcurrent ~ overdriving ~ overdue PPM ~ OVERHEAD ~ overhead contact line (OCL) ~ overhead contact system (OCS) ~ overhead contact system mast (OCS gantry) ~ overhead contact system mast (OCS mast) ~ overhead contact system structure (OCS structure) ~ overhead contact system structure numbers (OCS structure numbers) ~ overhead line ~ overhead line conductor (OLC) ~ Overhead Line Engineer (OLE Engineer) ~ overhead line equipment (OHLE, OLE) ~ overhead line gantry (OLE gantry) ~ overhead line mast (OLE mast) ~ overhead line permit (OLP) ~ overhead line stanchion ~ overhead line structure (OLE structure) ~ overhead line structure numbers (OLE structure numbers) ~ overhead line switch ~ overhead line under construction ~ overhead trolley leads ~ overhead trolley supply ~ overheads ~ overlap (OL) ~ overlap joint ~ overlap span ~ overlapping design ~ overlay ~ Overlay European train control system ~ Overlay ETCS ~ overlay miniature stop lights (OMSL) ~ overlay MSL ~ overlay track circuit ~ overlift ~ overline bridge (OB) ~ overload ~ overload relay ~ override ~ overriding switch ~ OVERRUN ~ overrun ~ Overrun Risk Assessment Model (ORAM) ~ overrun wire ~ oversail block ~ oversetting ~ overshot curve ~ overshot transition ~ overspeed ~ overspeed derailment ~ overspeed sensor system (OSS) ~ overstressed rail ~ overturning block ~ overview ~ overview diagram ~ OW ~ OWB ~ Oyster ~ OZ

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P

P ~ P and C ~ P and C tamper ~ P limit ~ P Stock ~ P way ~ P/GUI ~ P&C ~ P&C tamper ~ P&D ~ P&DSW ~ P&E ~ P&F ~ P&LJR ~ P&M ~ P&T ~ P&T staff ~ P&TS ~ P&WJR ~ P&WYR ~ P1 ~ P1 profile ~ P10 ~ P10 profile ~ P11 ~ P11 profile ~ P12 ~ P12 profile ~ P3 ~ P5 ~ P5 profile ~ P6 ~ P6 profile ~ P8 ~ P8 profile ~ P9 ~ P9 profile ~ PA ~ PAB ~ PABC ~ PABS ~ PABX ~ PAC ~ Pacer ~ Pacifastacus leniusculus ~ packet 44 ~ packing ~ packing area ~ PACT ~ PACT track ~ PACTS ~ PAD ~ pad ~ pad heater ~ Paddington accident ~ paddle ~ PADS ~ Paid area ~ paint drop ~ PAIP ~ PAL ~ PALADIN ~ PALAS ~ PALWIN ~ PAM ~ PAMELA ~ PAMX ~ Pan ~ pan down ~ PAN x ~ Panchex ~ Pandrol ~ Pandrol baseplate ~ Pandrol clip ~ Pandrol rail clip ~ panel ~ panel lifting equipment ~ panel multiplexer ~ panel processor ~ panel processor module (PPM) ~ panel request ~ panel signal box ~ panel Signaller ~ PANEL/TDM/FLR ~ panelling out ~ Panlock key ~ pannier turnout ~ panning ~ Panpuller ~ Pansetter ~ pansway ~ panto ~ PANTO/SHOE ~ pantograph ~ pantograph exclusion zone ~ pantograph gauge ~ pantograph head ~ pantograph hook-over ~ pantograph horn ~ pantograph sway ~ pantograph well ~ pantograph well flashover ~ PAP ~ papa ~ paper trap ~ parabolic rail ~ parallel bonding ~ parallel design ~ parallel design agreement (PDA) ~ parallel feeders ~ parallel feeder wires ~ parallel junction ~ parallel movements ~ parallel platform movements ~ parallel rail ~ parallel signals ~ parallel tamping ~ parallel wing (PW) ~ parallel wing extension rail ~ parallel wing left (PWL) ~ parallel wing rail ~ parallel wing right (PWR) ~ parallel working ~ parapet ~ parapet wall ~ parapet coping ~ PARAT ~ parcels dock ~ park and ride ~ parking brake ~ parkway ~ PARL ~ Parliamentary ~ Parliamentary Advisory Council for Transport Safety (PACTS) ~ Parliamentary gauge ~ Parliamentary train ~ Parly ~ Parr (YMA, YQA) ~ Parry People Mover ~ part bearer ~ part fabricated crossing ~ part step ~ part welded crossing ~ partial obscuration ~ partially fitted train ~ particle quantifier (PQ) index ~ parting ~ partition door ~ pass booked services (PBS) ~ PASS CONN ~ PASS DROP ~ PASS ILL ~ PASS INFO ~ PASS INJRY ~ pass-by ~ passable ~ passable signal ~ passcomm ~ passcomm / door activated light ~ passed at danger ~ passed out ~ passenger ~ passenger / freight changeover ~ passenger carriage ~ passenger change dates ~ passenger class ~ passenger coach ~ passenger communication apparatus (PCA) ~ passenger demand ~ passenger door ~ passenger emergency alarm (PEA) ~ passenger emergency alarm brake (PEAB) ~ passenger emergency point (PEP) ~ passenger help point (PHP) ~ passenger line ~ passenger loop ~ passenger mile ~ Passenger Operations Information System (POIS) ~ passenger rail franchise ~ passenger service ~ Passenger Service Agent ~ passenger service requirement (PSR) ~ passenger standards ~ passenger station ~ Passenger Track Access Agreement ~ passenger train ~ Passenger Transport Authority (PTA) ~ Passenger Transport Executive (PTE) ~ passenger trespasser ~ Passenger Upgrade (PUG) ~ passenger vehicle ~ passenger vehicle code ~ PASSENGERS ~ passengers in excess of capacity (PIXC) ~ Passengers’ Charter ~ passing a signal at danger ~ passing clearance ~ passing electrical clearance ~ passing loop ~ passing time ~ passive provision ~ passive tilt ~ PAT ~ patch resleepering ~ path ~ pathing allowance ~ Patrol Ganger ~ Patroller ~ Patroller’s lock out device (PLOD) ~ patrolling ~ patrolling diagram ~ Patrolman ~ Patrolman’s lock out device ~ pattress plate ~ PAVA ~ Paved Concrete Track (PACT) ~ paved track ~ Pawlock ~ Pax ~ PAX ~ PB ~ PBDTSO ~ PBI ~ PBS ~ PBX ~ PC ~ PC&BR ~ PCA ~ PCA emergency brake handle ~ PCB ~ PCC ~ PCD ~ PCE ~ PCF ~ PCL ~ PCM ~ PCN ~ PCP ~ PCR ~ PCRO ~ PCS ~ PCS&TE ~ PCSE(M) ~ PCSE(W) ~ PCT ~ PCTE ~ PCU ~ PCV ~ PD ~ PD&SWJR ~ PD&T ~ PDA ~ PDAC ~ PDD ~ PDF ~ PDFH ~ PDG ~ PDH ~ PDI ~ PDI-F ~ PDI-P ~ PDJR ~ PDM ~ PDMX ~ PDP ~ PDR ~ PDS ~ PDSS ~ PDSW ~ PDTR ~ PDU ~ PE ~ PEA ~ PEAB ~ peak door closing force ~ peak period ~ Peaks ~ pearlitic rail ~ PEARS ~ Pease ~ Pease, Edward ~ PEAW ~ PEC ~ PED ~ pedestal ~ Pee-Wee ~ PeeWee ~ peg ~ peg number ~ peg over ~ peg up ~ pegging block instrument ~ PEL ~ PEM ~ PEME ~ Pendolino ~ penguins ~ penning layer ~ PEP ~ PER ~ per way ~ Perch (YEA) ~ Perch train ~ percussive maintenance ~ PERCY ~ PERFORM ~ performance ~ performance allowance ~ Performance and Loading Analysis Database Information (PALADIN) ~ performance category ~ Performance Historic Information System (PHIS) ~ periodic review (PRxx) ~ Periodical Operating Notice (PON) ~ period ~ PERM ~ Permali ~ Permali joint ~ permanent AWS inductor ~ permanent AWS magnet ~ permanent inductor ~ permanent magnet ~ permanent speed restriction (PSR) ~ permanent way (P way, per way, PW, Pway) ~ permanent way drawing ~ Permanent Way Engineer (PWE) ~ Permanent Way Inspector ~ Permanent Way Institution, The (PWI) ~ permanent way maintenance (PWM) ~ Permanent Way Maintenance Engineer (PWME) ~ Permanent Way Section (PWS) ~ Permanent Way Section Inspector (PWSI) ~ Permanent Way Section Manager (PWSM) ~ Permanent Way Section Supervisor (PWSS) ~ permanently coupled ~ permanently earthed section (PES) ~ Permaquip ~ Permaquip trolley ~ permillage ~ permissible speed (PS) ~ permissible speed indicator (PSI) ~ permissible speed sign ~ permission to proceed ~ permissive ~ permissive block ~ permissive freight (PF) ~ permissive movement ~ permissive passenger (PP) ~ permissive working ~ permit to work ~ permitted development (PD) ~ permitted speed ~ Person in Charge (PiC) ~ Person in Charge of Nightly Maintenance Possession (PICONMP) ~ Person in Charge of Possession (PICOP) ~ Person in Charge of Work (PICOW) ~ Personal Track Safety (PTS) ~ Personal Track Safety certification ~ PERTIS ~ perturbation ~ perturbation crossover ~ perturbed ~ PES ~ PESG ~ peter ~ Peto, Sir Samuel Morton ~ PETS ~ PF ~ PFA ~ PFB ~ PFK ~ PFL ~ PFM ~ Pfm. ~ PFMD ~ PFP ~ PFR ~ PG ~ PG1 ~ PG1 gauge ~ PG2 ~ PG2 gauge ~ PG3 ~ PG3 gauge ~ PGI ~ PGM ~ PgRS ~ PHA ~ phantom aspect ~ phantom overlap (POL) ~ phantom restricted overlap (PROL) ~ phantom signal ~ Phase 1 ~ Phase 2 ~ Phase 2a ~ Phase 2b ~ PHBT ~ PHCC ~ Phillips weld ~ PHIRES ~ PHIS ~ PHOD ~ PHONE/SPT ~ phonetic alphabet ~ PHoT ~ PHP ~ PHRTA ~ PhX Rail ~ Phylplug ~ PIBS ~ PIC ~ PICEE ~ pick up ~ pick-up only ~ pick-up time ~ picked ~ picked up ~ picking up ~ PICOD ~ PICONMP ~ PICOP ~ PICOP briefing ~ PICOP meeting ~ PICOS ~ PICOT ~ PICOW ~ PICP ~ PICTI ~ PIDD ~ PIDS ~ piece up ~ piecemeal ~ pier ~ PIER plans ~ PIF ~ pig’s ear ~ piggy back baseplate ~ piggyback ~ piggyback trailer ~ Pike (ZAA) ~ pilaster ~ Pilchard (YCO) ~ pilot ~ pilot light ~ pilot locomotive ~ Pilot working ~ Pilotman ~ PIM ~ pimple pad ~ PIMS ~ pin code ~ pinch bar ~ pinch point ~ PINE ~ pink copies ~ pink pages ~ pinks ~ pinnacle ~ pinning down ~ pinning down brakes ~ PINS ~ Pioneer ~ PIOT ~ PIP ~ pipe bridge ~ piped ~ piped vehicle ~ piping ~ PIPIT ~ PIPS ~ PIPS 2 ~ PIR ~ Piranha (PNA) ~ PIRU ~ PIS ~ PISG ~ piston relief duct ~ pitblocks ~ pitching ~ pivot light ~ PIXC ~ pixie ~ PJ ~ PjRS ~ PK ~ PKC ~ PL ~ PLA ~ PLA 68 ~ place of safety (POS) ~ Plaice (ZCV) ~ plain line (PL) ~ plain line pattern recognition (PLPR) ~ plain line tamper ~ plain line track renewals (PLTR) ~ plain lining ~ plain rail ~ PLAND CANC ~ plane of the rails ~ planed rail ~ planing ~ planing heel ~ planing length ~ Planing radius ~ Planlite ~ PLANND COT ~ PLANND TSR ~ planned maintenance ~ planned preventative maintenance (PPM) ~ Planning and Delivering Safe Work (P&DSW, PDSW) ~ planning headway ~ planning meeting ~ Planning Oversight Group (POG) ~ PLANS ~ plant assessment body (PAB) ~ plant gauge ~ Plant Operator Licence holder ~ plant rails ~ planted mast ~ Plasser ~ Plasser & Theurer (P&T) ~ plastic deformation ~ plastic deformation of the rail head ~ plate ~ plate lines ~ plate oiling ~ plate rails ~ plated joint ~ Platelayer ~ plateway ~ PLATFORM ~ platform ~ platform ATO communications (PAC) ~ platform clearance ~ platform construction ~ platform coping ~ platform crossfall ~ platform edge ~ platform edge doors (PED) ~ platform edge protection (PEP) ~ platform face ~ platform furniture ~ platform gauge ~ platform height ~ Platform Identification Beacon System (PIBS) ~ platform length ~ platform level ~ platform line ~ platform loop ~ platform nosing ~ platform numbering ~ platform occupancy ~ platform offset ~ platform radius ~ platform ramp ~ platform roll space ~ platform safety pit ~ platform safety space ~ platform screen ~ platform screen doors ~ platform section ~ platform sharing ~ platform starter ~ platform starting signal ~ platform surface ~ platform train interface (PTI) ~ platform utilisation ~ platform wall ~ platform work ~ platform yellow line ~ platform zone ~ platings ~ PLATO ~ PLB ~ PLBE ~ PLC ~ PLGS ~ PLH ~ PLJI ~ PLND LOP ~ PLND TSR ~ PLOD ~ plough ~ plough brake ~ PLPR ~ PLRA ~ PLS ~ PLTR ~ PLUG ~ plug ~ plug doors ~ plugging ~ PLUM ~ plunger ~ PM ~ PMA ~ PMB ~ PMBX ~ PMCS ~ PME ~ PMI ~ PMMS ~ PMR ~ PMS ~ PMSE ~ PMU ~ PMUX ~ Pmux ~ PMV ~ PMVT ~ PN ~ PNA ~ PNB ~ pneumatic ballast injection (PBI) ~ pneumatic ballast injection machine ~ pneumatic door seal ~ PNO ~ PNT HEATER ~ PO ~ PO/CL ~ POCL ~ POA ~ pocket length (PL) ~ pocketed formation ~ pod ~ POD ~ podestrian ~ POE ~ POG ~ POGO ~ point bar ~ point clip ~ point cloud ~ point cloud survey ~ point controller ~ point detection ~ point detector ~ point end ~ point end identification plate ~ point gauge ~ point handle ~ point heater ~ point machine ~ point motor ~ point numbers ~ point of derailment (POD) ~ point of vertical curve (PVC) ~ point of vertical intersection (PVI) ~ point of vertical tangency (PVT) ~ point operating equipment (POE) ~ point rail ~ point rodding ~ point to point time (PTP) ~ point watching ~ point wing rail ~ point zone telephone (PZT) ~ PointCare ~ pointer ~ pointing on ~ points ~ points and crossings (P&C) ~ points data ~ points failure ~ POINTS FLR ~ points heating ~ points indicator ~ points memory ~ points opening (PO) ~ Points Operator (PO) ~ points position indicator (PPI) ~ points rodding ~ points run through ~ pointwork ~ POIS ~ POL ~ pole and tape ~ pole and tape survey ~ pole applied clamp ~ POLI ~ POLICE-RLY ~ POLICE-TRN ~ Policeman ~ policeman irons ~ politician ~ POLKADOT ~ Pollock (ZCA) ~ Polmont accident ~ polychloroprene ~ polymeric insulator ~ POM ~ PON ~ pony truck ~ poor ~ PoP ~ POP ~ POPMAR ~ porous weld ~ Porpoise (YEA) ~ port ~ portable automatic warning system magnet ~ portable AWS magnet ~ portable earth ~ portal ~ portal structure ~ portalisation ~ porte-cochere ~ Portec Rail ~ Porterbrook ~ Porterbrook Leasing ~ PORTIS ~ POS ~ POS Rep ~ pos. ~ PoSA ~ position light ground signal (PLGS) ~ position light junction indicator (PLJI) ~ position light signal (PLS) ~ position light subsidiary signal ~ position of safety (POS) ~ position x ~ positive cant ~ positive conductor rail ~ positive insulator stool ~ positive rail ~ positive stagger ~ positive train identification (PTI) ~ posn. ~ poss. ~ possession ~ possession arrangements ~ possession book ~ possession change control form ~ possession irregularity ~ possession limit board (PLB) ~ possession limits ~ Possession Manager ~ Possession Master ~ possession only vehicle ~ possession overrun ~ Possession Planning System (PPS) ~ Possession Strategy Notice (PSN) ~ PossMan ~ post and wire fence ~ Post incident brake test ~ post-trip mode (PT) ~ poste kilometrique (PK) ~ pot ~ pot sleeper ~ potential equalising jumper ~ potential-free contacts ~ POTIS ~ Potter’s Bar accidents ~ Potters Bar Investigation Board ~ pound ~ pounds per yard ~ POV ~ Powellising ~ power box ~ power car (PC) ~ Power Control Room Operator (PCRO) ~ power controller ~ power disable test (PDT) ~ power frame ~ power operated doors ~ power operated points ~ power operated switches ~ power signal box (PSB) ~ power signalling ~ powered axle ~ powered canopy trolley (PCT) ~ powered switch ~ pozzy rail ~ PP ~ PPA ~ PPE ~ PPF ~ PPFF ~ PPI ~ PPM ~ PPP ~ PPPC ~ PPS ~ PPTPPTC ~ PPTD ~ PPTE ~ PPUDO ~ PQ ~ PQI ~ PQS ~ PR ~ PR series clip ~ PR08 ~ PR2000 ~ PRAMS ~ Prawn (YNO) ~ PRB ~ PRD ~ PRDC ~ pre-assembly depot (PAD) ~ pre-coated grooved rail ~ pre-curved rail ~ pre-departure examination ~ pre-Grouping ~ pre-set shunt ~ pre-tap ~ predetermined overrun protection (POP) ~ prefab. relaying ~ preferred option ~ preferred platform ~ preferred route ~ preliminary caution ~ preliminary caution aspect ~ preliminary hazard analysis ~ preliminary route indicator (PRI) ~ premature renewal of track ~ prepare a locomotive ~ prepare a train ~ prepare loop ~ presag ~ Presco ~ preselection ~ preserved railway ~ prestressed concrete sleeper ~ Pretendolino ~ prevent shunt ~ prevention through engineering and design (PtED) ~ PRG ~ PRHC ~ PRI ~ PRIDE ~ PRIMA ~ primary function relay ~ primary gate ~ Primary Member of Service (PRIMOS) ~ primary sponsor ~ primary suspension ~ primary timetable change ~ priming ~ PRIMOS ~ PRINCE 2 ~ Principal Contractor ~ Principal Contractor Licence (PCL) ~ Principal Designer (PD) ~ principal direction ~ principal station ~ principal supply point (PSP) ~ principal timetable ~ prior working timetable ~ PRISM ~ Prism Rail ~ prism spigot ~ private operator circulation letter ~ private owner wagon ~ private railway ~ private siding (PS) ~ Private Siding Agreement (PSA) ~ private wagon ~ Private Wagon Registration Agreement (PWRA) ~ Privatisation ~ prize length ~ PRM ~ PRMP ~ PRO DVR ~ proceed ~ proceed aspect ~ proceed at caution ~ proceed on sight authority (POSA) ~ product acceptance ~ production copies ~ production vehicle (PV) ~ professional driving ~ professional driving policies ~ Professional Services Framework (PSF) ~ profile board ~ profile bucket profile grinding ~ programme level x ~ programme machine ~ programme machine roll ~ programme only mode ~ progressive collapse ~ progressive driving ~ Prohibition Notice ~ Project Ariel ~ project chainage ~ project definition ~ Project Delivery Standards Specification (PDSS) ~ Project Development Manager (PDM) ~ Project Elephant ~ Project Engineer (PE) ~ project entity ~ Project Evergreen ~ Project Interface Coordinator (PIC) ~ Project Mercury ~ project metreage ~ Project Rainbow ~ Project Release ~ Project Resolve ~ PROMISE ~ PROMPT ~ PROMT ~ propel ~ propelling ~ propelling control vehicle (PCV) ~ propelling move ~ propelling movement ~ proper shipping name (PSN) ~ proportional relay valve ~ proposal ~ propped cantilever ~ Proscient ~ protected ~ protected manual ~ protected wrong side failure (PWSF) ~ protecting signal ~ protection ~ protection arrangements ~ Protection Controller (PC) ~ protection duties ~ protection key switch ~ protection limits ~ Protection Master ~ protection of a train ~ protection in rear ~ protection of the line ~ protection planking ~ protection wire ~ PROTIM ~ Prototype, the ~ proved ~ proving ~ PRoW ~ PRR ~ PRS ~ PRT ~ Prud’homme equation ~ PRxx ~ PRxxx ~ PRxxxA ~ PS ~ PSA ~ PSB ~ PSC ~ PSD ~ Pseudotsuga menziesii ~ PSF ~ PSI ~ PSICA ~ PSK ~ PSL ~ PSLG ~ PSM ~ PSN ~ PSO ~ PSOG ~ PSP ~ PSPP ~ PSR ~ PSSI ~ PSTN ~ PSU ~ PSUP ~ PT ~ PT mode ~ PT&R ~ PTA ~ PTB ~ PTBSO ~ PTC ~ PTE ~ PtED ~ PTEG ~ PTF ~ PTG ~ PTI ~ PTI Corridor ~ PTISG ~ PTISIG ~ PTM ~ PTO ~ PTP ~ PTQ ~ PTS ~ PTSH ~ PTSO ~ PTSRMB ~ PTT ~ PTW ~ PTZ ~ public / book differential ~ Public Emergency Telephone System (PETS) ~ Public Performance Measure (PPM) ~ public railway ~ Public Service Obligation Grant (PSOG) ~ public timetable ~ Puffin (ZCV) ~ PUG ~ pull force ~ pull length ~ pull off ~ pull plate ~ pull rod ~ pull test ~ pulled off ~ pulley cross dropper ~ pulley formed wheels ~ pulley wheels ~ pulling back ~ pulling back rails ~ pulling point ~ pulling the cord ~ pulling the string ~ pulling through ~ PUM ~ pump handle ~ pump train ~ pumping ~ PUMPS ~ Purley accident ~ purple sidings ~ push button ~ push off ~ push out ~ push rod ~ push-pull ~ push/pull ~ pushback (door mechanism) ~ PUT ~ put away ~ put inside ~ put back ~ putting the bag in ~ PUWER ~ PVB ~ PVC ~ PVF ~ PVG ~ PVI ~ PVP ~ PVT ~ PVT clip ~ PW ~ PWay ~ PWHT ~ PWI ~ PWI-brow ~ PWL ~ PWM ~ PWMA ~ PWME ~ PWR ~ PWR SUP DIS ~ PWRA ~ PWRAMG ~ PWS ~ PWSC ~ PWSF ~ PWSI ~ PWSM ~ PWSS ~ PWT-EH ~ PYS ~ PZ ~ PZT

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Q

Q ~ Q path ~ Q Stock ~ Q train ~ Q/D limit ~ QA ~ QB ~ QCRA ~ QDR ~ QH ~ QI ~ QJ ~ Qlink ~ QM ~ QN ~ QP ~ QRA ~ QRBSS ~ QSRA ~ QT ~ QTron ~ quadrant point indicator ~ quadrification ~ quadruple junction ~ quadruple track ~ Quail Map ~ quarter chord ~ quebec ~ queen points ~ queenie ~ QUENSH ~ Quercus robur ~ quick ~ quick swings ~ quick-coupler ~ quick-hitch ~ quill drive ~ quilting ~ Quintinshill accident ~ quoit ~ QY&MJR

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R

R ~ R board ~ R door ~ R stock ~ R-CR ~ R-RISG ~ R-SMB ~ R(SCW) ~ R/G ~ R/T ~ R&CT ~ R&KFR ~ R&R ~ R&SBR ~ R&VM ~ R1 ~ R1 1-60 ~ R2 ~ R2P2 ~ R3 ~ R3G ~ R4 ~ R5 ~ R6 ~ R7 ~ RA ~ Ra Ra ~ RA93 ~ RAATS ~ RAB ~ rabbit’s ears ~ Racal ~ racecard ~ RACI ~ rack railway ~ RACOP ~ RADAR report ~ radial arm ~ radial arm axlebox ~ radio block centre (RBC) ~ Radio Electronic Token Block (RETB) ~ RADIO FLR ~ radio signal verification train (RSV train, RSVT) ~ radio survey coaches (RSC) ~ radius (R) ~ RADR ~ RADSAFE ~ RAFT ~ raft ~ rafted station ~ RAG ~ RAI ~ RAIB rail ~ rail / wheel interface ~ Rail Accident Investigation Branch (RAIB) ~ Rail Accident Investigation Branch (RAIB) Recommendations Review Group (R3G) ~ rail adhesion train ~ rail adjusting ~ rail adjustment ~ rail alloy ~ rail anchor ~ rail attachment ~ rail authority ~ rail beam ~ rail bearer ~ rail bearing area ~ rail bender ~ rail bonding ~ rail branding ~ rail break ~ rail calliper ~ rail centre line ~ rail centres rail circuit ~ rail clamp point lock (RCPL) ~ rail clip ~ rail corrugation ~ rail crane ~ rail creep ~ Rail Crossing Diversion Order (RCDO) ~ Rail Crossing Extinguishment and Diversion Orders Regulations 1993 ~ Rail Crossing Extinguishment Order (RCEO) ~ rail crown ~ rail datum mark rail defect ~ Rail Delivery Group (RDG) ~ rail depth ~ rail dogs ~ rail drill ~ rail end ~ rail end batter ~ Rail Express Systems (RES) ~ rail fastening ~ RAIL FLAW ~ rail flaw ~ rail flaw detector ~ rail foot ~ rail foot insulator ~ rail freight ~ Rail Freight Corridor (RFC) ~ Rail Freight Group (RFG) ~ Rail Freight Operations Group (RFOG) ~ rail gall ~ rail gall of baseplates ~ rail gap ~ rail gap indicator ~ rail gap repeater ~ rail gate stop ~ rail gear ~ rail grid ~ rail grinder ~ rail grinding ~ rail grinding train (RGT) ~ rail grinding unit (RGU) ~ rail head ~ rail head conditioning train ~ rail head conditions ~ rail head grinding ~ rail head profile ~ rail head treatment train (RHTT) ~ Rail Incident Officer (RIO) ~ rail inclination ~ rail industry, the ~ Rail Industry Group (RIG) ~ Rail Industry Standards (RIS) ~ rail joint ~ rail joint bond ~ rail joint straightener ~ rail joint straightening (RJS) ~ rail key ~ rail length ~ rail level ~ rail lubricator ~ rail mode ~ rail mounted maintenance machine (RMMM) ~ rail nips ~ Rail Operating Centre (ROC) ~ rail pad ~ Rail Passengers’ Council (RPC) ~ rail pile ~ rail planing ~ rail planing machine ~ rail plant Rail Plant Association (RPA) ~ Rail Plant Operating Company in Possessions licence (POL) ~ rail profile ~ Rail Property Limited ~ rail puller ~ Rail Regulator, The ~ Rail Research UK Association (RRUKA) ~ rail roll over ~ rail rolling over ~ rail rotation ~ Rail Safety and Standards Board ~ rail safety authority ~ rail safety case ~ rail saw ~ rail scale ~ rail seat ~ rail seat depth ~ rail seat erosion ~ rail section ~ Rail Settlement Plan (RSP) ~ rail shoe ~ rail skate ~ rail steel ~ rail stressing ~ rail technical strategy (RTS) ~ rail temperature ~ rail tensors ~ rail thimble ~ rail threader ~ rail tongs ~ Rail Traffic Management Controller ~ Rail Training Accreditation Scheme (RTAS) ~ rail turning ~ rail turning bar ~ rail vehicle ~ Rail Vehicle (Exemption Applications) Regulations 1998 ~ Rail Vehicle Accessibility Regulations 1998 (RVAR) ~ rail vehicle records system (RAVERS) ~ rail vehicle section ~ rail warmers ~ rail warming ~ rail wear ~ rail web ~ rail weight ~ rail weld ~ rail wheel ~ rail wheel brake ~ rail-built buffer stop ~ Rail-view ~ rail, development of ~ railborne plant ~ railcar ~ Railcote ~ RAILDATA ~ RailData BV ~ Railfail ~ railhead ~ RAILNET ~ RailSys ~ RAILTEL ~ Railtex ~ railtour ~ Railtrack (RT) ~ Railtrack Company Standard (RCS) ~ Railtrack Line Standards (RLS) ~ Railtrack Zones (RTZ) ~ railway ~ Railway Accident Investigation Unit (RAIU) ~ railway administration ~ Railway Age, The ~ Railway and Transport Strategy Centre (RTSC) ~ railway boundary ~ Railway Byelaws, the ~ Railway Clearing Act 1850 ~ Railway Clearing House (RCH) ~ Railway Clearing House illiterate symbols ~ Railway Communication System (RCS) ~ Railway Companies’ Association (RCA) ~ railway company ~ railway competencies ~ railway contractors certificate (RCC) ~ Railway Control Centre (RCC) ~ railway corridor ~ railway curves ~ railway customs areas (RCA) ~ railway emergency ~ Railway Engineer’s Association (REA) ~ Railway Engineering Company Limited, the (TRE) ~ railway enthusiast ~ railway facility ~ Railway Fires Act 1905 ~ railway fog signal ~ Railway Group member (RGM) ~ Railway Group Standard (RGS) ~ Railway Group Standards Code ~ Railway Group, the ~ Railway Heritage Committee ~ Railway Heritage Designation Advisory Board ~ Railway industry ~ Railway Industry Association (RIA) ~ Railway Industry Association Signalling Suppliers Group (RIASIG) ~ Railway Industry Commodity Classification List (RICCL) ~ railway industry standard (RIS) ~ Railway Industry Supplier Qualification Scheme (RISQS) ~ railway industry, the ~ Railway Infrastructure Network Model (RINM) ~ Railway Inspectorate (RI) ~ Railway Interoperability Directive ~ railway legislation (current) ~ Railway Level Crossings Act 1839 ~ Railway Operations (Ops.) ~ Railway Order, the ~ Railway Procurement Agency (RPA) ~ Railway Regulation (Gauge) Act 1846 ~ railway regulatory regime ~ Railway Safety and Standards Board ~ railway safety case (RSC) ~ Railway Safety Commission (RSC) ~ Railway Safety Limited ~ Railway Safety Principles and Guidance (RSPG) ~ railway trade ~ railway undertaking ~ Railways (Accident Investigation and Reporting) Regulations 2005 (RAIR) ~ Railways (Class and Miscellaneous Exemptions) Order 1994 (CMEO) ~ Railways (Conveyance of Mails) Act 1838 ~ Railways (Prevention of Accidents) Act 1900 ~ Railways (Safety Case) Regulations 1994 ~ Railways (Safety Cases) Regulations 2000 (RSCR) ~ Railways (Safety Critical Work) Regulations 1994 (RSCWR, R(SCW)) ~ Railways Act 1921 Railways Act 1993 (RA93) ~ Railways Act 2005 ~ Railways and Other Guided Transport Systems (Safety) Regulations 2006 (ROGS, ROGTS) ~ Railways and Other Transport Systems (Approval of Works, Plant and Equipment) Regulations 1994 (ROTS) ~ Railways and Transport Safety Act 2003 (RTSA) ~ Railways Clauses Act 1863 ~ Railways Clauses Consolidation Acts 1845 ~ Railways for All Strategy ~ Railways Infrastructure (Access and Management) Regulations 2005 ~ rain ~ Rainhill Trials, the ~ RAIR ~ raised check rail ~ raised guard rails ~ RAIT ~ RAIU ~ rake ~ RAM ~ Ramboll A/S ~ RAMP ~ ramp end ~ ramping ~ ramping in ~ ramping out ~ RAMS ~ Ramsar ~ RAP ~ Rapper ~ RAR ~ RASTIC ~ RAT ~ rat ~ rat hole ~ rat trap ~ ratchet jack ~ rate of gain of cant (RgC, RgE) ~ rate of gain of cant deficiency (RgD) ~ rate of rotation of carbody ~ rationalisation ~ RATS ~ RATT ~ Rattus ~ Rattus norvegicus ~ Raven, Vincent, L. ~ RAVERS ~ raw edges ~ RAWPE ~ Raynes Park accidents ~ Raynes Park control ~ RB ~ RB(T) ~ RBC ~ RBH ~ RBR ~ RBS ~ RBT ~ RC ~ RCA ~ RCC ~ RCCD ~ RCD ~ RCDO ~ RCE ~ RCEA ~ RCEO ~ RCF ~ RCH ~ RCI ~ RCIS ~ RCM ~ RCM ALERT ~ RCS ~ RCTIS ~ RCV ~ RCV baseplate ~ RD ~ RD Clip ~ RD9 ~ RDA-RT ~ RDC ~ RDE ~ RDF ~ RDG ~ RDL ~ RDMS ~ RDO ~ RDR ~ RDS ~ RDT ~ RDW ~ Re ~ RE ~ Re ~ re-control ~ re-gauging ~ RE/PW ~ RE/PW drawings ~ REA ~ reach-stacker ~ reachstacker ~ REACT ~ reactionary delay ~ reactive maintenance ~ reactive track renewals ~ read ~ reading ~ read through ~ readability ~ readable ~ readback ~ reading through ~ reading time ~ ready to start indicator ~ ready to start plunger ~ ready to start signal ~ Reagan system ~ real toe ~ realignment ~ rearwall ~ reasonably practicable ~ reassurance tone ~ REAZ ~ REB ~ reballast (RB) ~ reballasting ~ REBS ~ REC ~ recast ~ recasting ~ receptacle box ~ reception line ~ reception siding ~ recess siding ~ recessing siding ~ recessing ~ reciprocal locking ~ reciprocating hammer ~ reconnaissance visit ~ recontrol ~ record of site safety arrangements and briefing form ~ recording point ~ recording traces ~ RECOS ~ recovery crane ~ recovery time ~ recovery train ~ rectifier ~ red (R) ~ red aspect ~ red block ~ red bond ~ red card ~ red carding ~ red circle ~ red diamond ~ red item ~ red siding ~ Red Snapper ~ red triangle ~ red zone ~ red zone prohibited ~ red zone prohibition (RZP) ~ red zone working ~ red/green lights (R/G) ~ REDE ~ REDG ~ Redifon MEL (RMEL) ~ Redlands SDT ~ REDP ~ reduced clearance ~ reduced overlap ~ reduced passing clearance ~ reduced platform clearance ~ reduced structure clearance ~ redundant assets ~ redundant track ~ Reed ~ Reed track circuit ~ REF ~ reflectorised distant board ~ reflectorised speed signs ~ REFOS ~ refuge ~ refuge siding ~ REG INSTRC ~ REG-LATE ~ REG-ONTIME ~ regenerative braking ~ Region ~ Regional Civil Engineer (RCE) ~ Regional Electricity Company (REC) ~ regional operators ~ Regional Railways (RR) ~ register ~ register arm ~ Register of Infrastructure (RINF) ~ register point ~ registration ~ registration arm ~ registration pin code (pin code) ~ registration point ~ regrade ~ regression ~ regression analysis ~ regulate ~ regulating versines ~ REGULATION ~ regulation ~ Regulation of Railways Act 1840 ~ Regulation of Railways Act 1842 ~ Regulation of Railways Act 1844 ~ Regulation of Railways Act 1871 ~ Regulation of Railways Act 1889 ~ regulator ~ REH ~ reinforced insulation ~ relative gauging ~ relative track geometry ~ relatives ~ relative differences ~ relay ~ relay interlocking (RI) ~ relay on top ~ relay room ~ relayer ~ relaying ~ relaying bus ~ relaying gang ~ relaying item ~ relaying proposal ~ release ~ release key ~ release speed ~ release speed ~ release time ~ released ~ released capacity ~ relevant earthworks ~ reliability centred maintenance (RCM) ~ Reliable Data Systems. (RDS) ~ RELIANCE ~ relief ~ relief line ~ relief Signaller ~ relieving bogie ~ Reliostop ~ relocatable equipment building (REB) ~ relock ~ relocking ~ reminder appliance ~ reminder sheets ~ reminder sign ~ remodelling ~ remote interlocking ~ remote override control (ROC) ~ remote route request ~ remote securing of points ~ remotely controlled level crossing ~ remotely controlled manned level crossing (RC) ~ renewal ~ renewal of way (ROW) ~ renewal by stealth ~ renewal item ~ renewal of way item (ROW item) ~ renewals avoided ~ renewals proposal ~ Renewals, the ~ Renlog ~ repadding ~ repair ~ repeater ~ repeater location ~ repeater sign ~ repeater signal ~ replace ~ replacement ~ replacement joint ~ replacement switch ~ replatform ~ replatforming ~ reporting number ~ reprofiling ~ REPTA ~ request stop ~ required reading distance ~ required sighting distance ~ required warning time ~ requires ~ rerailing (RR) ~ RES ~ reset and continue ~ reset and continue incident ~ resetting ~ resident Signaller ~ residual electrical hazards (REH) ~ residual lift ~ residual potential ~ residual slue ~ residual stress ~ residual switch opening (RSO) ~ resignalling ~ resignalling scheme ~ resilient wheels ~ resleepering (RS) ~ Resonate ~ respacing ~ responsible manager ~ rest day ~ restoration to service ~ restressing (RS) ~ restricted manual (RM) ~ restricted overlap (ROL) ~ restriction of use (RoU) ~ restrictive aspect ~ restroking ~ retaining wall ~ retarder ~ RETB ~ Retention devices ~ RETIME REQ ~ retractioning ~ return ~ return bell communication (RBC) ~ return conductor (RC) ~ return conductor to rail bond ~ return rail ~ return screening conductor (RSC) ~ return working ~ returned ballast ~ returning ~ revenue ~ revenue vehicles ~ reverse ~ reverse curve ~ reverse point ~ reverse position ~ reverse rotation shift pattern ~ reverse transition ~ reverser ~ reverser key ~ reversible line ~ reversible signalling ~ reversible working ~ reversing ~ reversing mode (RV) ~ reversing move ~ reversing siding ~ reversion ~ reverted ~ revocation of an emergency stop control ~ RF ~ RFA ~ RFB ~ RFC ~ RFD ~ RfD ~ RFDV ~ RFF ~ RFG ~ RFI ~ RFID ~ RFM ~ RFO ~ RFOA ~ RFOG ~ RFP ~ RFP-T ~ RFS ~ RgC ~ RgD ~ RgE ~ RGI ~ RGJL ~ RGM ~ RGS ~ RGSP ~ RGT ~ RGU ~ RH ~ RH&DR ~ RHA ~ RHC FLR ~ RHC LATE ~ RHC PROG ~ RHC rheostatic braking ~ RHM ~ RHPMS ~ RHPW ~ RHR ~ RHS ~ RHSC ~ RHT ~ RHTO ~ RHTT ~ RI ~ RIA ~ RIAC ~ RIAG ~ RIB RIC ~ RICA ~ RICCL ~ RICD ~ RICP ~ RID ~ riddler ~ riddling ~ RIDDOR ~ RIDE ~ ride force count (RFC) ~ Ride Quality ~ RIDRR ~ RIEF ~ RIF ~ RIFAA ~ RIFF ~ RIG ~ right angle measurement ~ right away (RA) ~ right away indicator (RA) ~ right away plunger (RA plunger) ~ right direction ~ right direction move ~ right direction movement ~ right hand common crossing ~ right hand curve ~ right hand parallel wing (RHPW) ~ right hand rail (RHR) ~ right hand relay ~ right hand running ~ right hand side (RHS) ~ right hand splice (RHS) ~ right hand switch (RHS) ~ right hand switch closed (RHSC) ~ right hand transition rail ~ right hand turnout (RHTO) ~ right hand twist rail ~ right road ~ right road move ~ right road movement ~ right side failure (RSF) ~ right time ~ right time railway (RTR) ~ rigid overhead conductor (ROC) ~ Rigid Overhead Conductor System (ROCS) ~ RII ~ RIIF ~ RiLA ~ RIM ~ RIMD ~ RIMINI ~ RIMINI form ~ RIMINI pack ~ RINF ~ ring dam ~ ringing off the shed ~ RINM ~ RIO ~ RIPG ~ RIPS ~ RIR ~ RIRG ~ RIS ~ RISAS ~ RISB ~ riser wall ~ RISF ~ risk ~ Risk Landscaping Tool (RiLa) ~ risk-based maintenance ~ RISQS ~ RISSC ~ RITC ~ RITS ~ RIU ~ RIV ~ Rixx ~ RJ ~ RJIS ~ RJS ~ RJWG ~ RK ~ RKB ~ RL ~ RL loading ~ RLB ~ RLCM ~ RLE ~ RLEE ~ RLHD CONT ~ RLS ~ Rm ~ RM ~ RM3 ~ RMB ~ RMBF ~ RMBT ~ RMC ~ RMDS ~ RME ~ RMEL ~ RMM ~ RMMM ~ RMP ~ RMS ~ RMT ~ RMxx ~ RMxxx ~ RN ~ RNA ~ RNAS ~ RNE ~ RNxx clip ~ RO ~ ROA ~ Roach (ZDA) ~ road ~ road gate stop ~ ROAD INCDT ~ road learning ~ road mode ~ road rail ~ road rail access point (RRAP) ~ road rail dozer ~ road rail dumper ~ road rail excavator ~ road rail vehicle (RRV) ~ road railer (RR) ~ road spread ~ road traffic signal ~ roadbed ~ roaring rails ~ Robel ~ robert ~ robust kerb ~ robust train protection ~ ROC ~ ROCC ~ rock armour ~ rock combing ~ Rock Slope Hazard Index (RSHI) ~ rocker box ~ rocker frame ~ ROCS ~ rodding ~ RODS ~ RoEP ~ ROF ~ ROG ~ ROGS ~ ROGTS ~ ROL ~ roll ~ roll away ~ roll space ~ roll stiffness ~ roll-by check ~ roll-by test ~ roller baseplate ~ rolley ~ rolley way ~ rolling contact fatigue (RCF) ~ rolling contact flaw ~ rolling radius ~ rolling radius difference ~ rolling stock ~ Rolling Stock Acceptance Board (RSAB) ~ rolling stock leasing company (RSLC) ~ rolling stock library (RSL) ~ Rolling Stock Register (RSR) ~ Rolling Stock Standards Committee ~ rolling stock technician ~ ROM ~ romeo ~ root ball ~ root jacking ~ ROP ~ rope-worked railway ~ roped access ~ ROR ~ RORI ~ RoRo ~ ROS ~ ROSCO ~ RoSE ~ ROSIN ~ ROSS ~ ROSTERING ~ ROSY ~ Rotabroach ~ rotary block ~ rotation damper ~ rotational failure ~ rotational stiffness ~ ROTE ~ ROTP ~ ROTR ~ ROTS ~ ROTT ~ RoU ~ rough ride ~ rough shunt ~ roundhouse ~ rounding ~ route ~ Route Acceptance Request (RAR) ~ route asset management ~ Route Asset Manager (RAM) ~ route availability (RA) ~ route bar ~ route card ~ route class ~ route closed ~ Route Control ~ Route Controller ~ Route Drivability Tool ~ route handed ~ route holding ~ route indicating signal ~ route indication ~ route indicator (RI) ~ route knowledge ~ route learning ~ route learning norm ~ route lever ~ route locking ~ route memory ~ route miles ~ route open ~ Route Operations Centre (ROC) ~ route proving ~ route refresher ~ route relay interlocking (RRI) ~ route release ~ route releasing ~ route request data ~ Route requirements document (RRD) ~ route risk assessment ~ Route Services ~ route setting ~ Route Setting Agent (RSA) ~ route setting card ~ route setting controls ~ route setting panel ~ route setting point ~ route setting position ~ Route to Gold (RtG) ~ Routes ~ ROW ~ ROW code ~ ROW item ~ rowlets ~ ROY ~ Roy Method ~ RP ~ RPA ~ RPB ~ RPC ~ RPCL ~ RPCR ~ RPDO ~ RPF ~ RPG ~ RPI ~ RPL ~ RPOS ~ RPP ~ RPPS ~ RPR ~ RPT ~ RQ ~ RR ~ RRAP ~ RRD ~ RRI ~ RRIP ~ RRNE ~ RRNW ~ RRSC ~ RRUK ~ RRUKA ~ RRV ~ RRWD ~ RS ~ RSA ~ RSAB ~ RSAG ~ RSAP ~ RSAR ~ RSBS ~ RSC ~ RSCo. ~ RSCWR ~ RSD ~ RSDG ~ RSDT ~ RSET ~ RSF ~ RSHI ~ RSID ~ RSIP ~ RSIS ~ RSL ~ RSLC ~ RSMD ~ RSO ~ RSP ~ RSPG ~ RSR ~ RSRP ~ RSRS ~ RSS ~ RSSB ~ RST ~ RSU ~ RSV train ~ RSVT ~ RSWLCM ~ RT ~ RT10S ~ RT12 ~ RT16 ~ RT1A ~ RT1B ~ RT21 ~ RT22 ~ RT23 ~ RT24 ~ RT27 ~ RT3 ~ RT3189 ~ RT60 ~ RT9 ~ RT9909 ~ RT9S ~ RTA ~ RTAC ~ RTAS ~ RTC ~ RTCC ~ RTCIG ~ RTCS ~ RTFN ~ RtG ~ RTG ~ RTHQ ~ RTI ~ RTIS ~ RTLS ~ RTM ~ RTMZ ~ RTN ~ RTP ~ RTPI ~ RTPS ~ RTR ~ RTS ~ RTSA ~ RTSC ~ RTST ~ RTTM ~ RTU ~ RTZ ~ RU ~ RU loading ~ rubber bonded cork (RBC) ~ rubber crumb ~ rubber cushion chair ~ rubber duck ~ rubbing face ~ rubbing plate ~ RUCC ~ Rudd (ZBA) ~ rugex ~ rule 55 ~ Rule Book handbooks ~ Rule Book, the ~ Rules of The Plan (ROP, ROTP) ~ Rules of The Route (ROR, ROTR) ~ ruling gradient ~ rumble strip ~ RUMS ~ run ~ run at caution ~ run in ~ run out ~ run round (RR) ~ run round facility ~ run round loop ~ run through ~ run-off ~ runaway ~ runner wagon ~ running ~ running away ~ running band ~ running brake test ~ running connection ~ running edge (RE) ~ running edge centre of structure (RECOS) ~ running edge face of steel (REFOS) ~ running edge face of structure (REFOS) ~ running face ~ running gear ~ running junction ~ running level transition ~ running line ~ running movement ~ running pressure ~ running rail ~ running round ~ running shunt signal ~ running signal ~ running surface ~ running through ~ running tunnel ~ Running Tunnel North (RTN) ~ Running Tunnel South (RTS) ~ running-off end ~ running-off rail ~ running-on end ~ running-on rail ~ running-on spanner ~ Ruping process ~ RUPP ~ rural barriers ~ rural line ~ RUS ~ Ruston ~ rutways ~ RV ~ RV mode ~ RVAR ~ RVfM ~ RVL ~ RVP ~ RW ~ RWI ~ Rx ~ RY ~ RYTOFF ~ RZ ~ RZUL

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S ~ S and C ~ S board ~ S door ~ S stock ~ S-DAS ~ S/B ~ S/W ~ S&C ~ S&C layout ~ S&C unit ~ S&D ~ S&DJC ~ S&DJR ~ S&EE ~ S&F ~ S&HJR ~ S&I S&KR ~ S&MJR ~ S&MLR ~ S&P ~ S&S ~ S&SD ~ S&T ~ S&TE ~ S1 ~ S1 chair ~ S2 ~ S2 chair ~ Sa ~ SA ~ SAA ~ SAB ~ SAB wheel ~ sabot ~ SABRE ~ SAC SACC ~ SACP ~ saddle ~ saddle chair ~ saddle crossing ~ saddle rail ~ saddle tank ~ SAE ~ SAF ~ safe overrun distance (SOD) ~ safe speed ~ safe system of work (SSoW) ~ safe system of work pack (SSoW pack) ~ Safe System of Work Planning System (SSOWPS) ~ Safe Task Leader (STL) ~ Safe Work Leader (SWL) ~ Safe Work Leader 1 (SWL1) ~ Safe Work Leader 2 (SWL2) ~ safe work limits ~ Safe Work Manager (SWM) ~ Safecess ~ Safecess path ~ safeguarded ~ safeguarded green zone ~ Safelock ~ Safer Trackside Working programme (STW) ~ safety authority safety barrier ~ safety benefit ~ safety block ~ safety by design (SbD) ~ safety case ~ safety certificate ~ safety critical ~ safety critical communications ~ safety critical equipment ~ safety critical staff ~ safety critical work (SCW) ~ safety distance ~ safety factor ~ safety integrity level (SIL) ~ safety loop ~ Safety Management in Railways (SAMRAIL) ~ Safety Management Information System (SMIS) ~ safety management system ~ safety of the line ~ safety of the line incident ~ safety points ~ Safety Regulation Committee ~ safety related ~ Safety Risk Model (SRM) ~ safety speed ~ safety validation ~ sag ~ sag curve ~ sagged contact ~ sagged contact equipment ~ SAI ~ SAIP ~ SAL ~ sale of access rights (SoAR) ~ Salisbury accident ~ Salmon (YFA, YMA, YMB, YMO, YSA, YWA, YXA) ~ saloon ~ SAM ~ SAMNET ~ SAMP ~ SAMRAIL ~ SAMS ~ sand blanket ~ sand drag ~ Sand Pram ~ Sand Rover ~ sand stick ~ Sandberg process ~ sanders ~ sanding ~ Sandite ~ Sandite train ~ Sandite unit ~ sandwich weld ~ SAP ~ SAPA ~ SAPB ~ SARI ~ SARPA ~ SAS ~ SASSPAD ~ SAT ~ SAT/DA ~ satellite interlocking ~ satellite tamping bank ~ satisfactory ~ SATS ~ SATURN ~ SATWS ~ SAU ~ SAVO ~ Saxby and Farmer (S&F) ~ Saxby, John ~ SB ~ SB mode ~ SB1 ~ SB1c ~ SBA ~ SBB ~ SBC ~ SbD ~ SBDC ~ SBI ~ SBI limit ~ SBIC ~ SBMD ~ SBP ~ SBR ~ SBSI ~ SC ~ SC0 file ~ SC3 Clip ~ SC4 ~ SC8 ~ SCADA ~ SCAG ~ SCALA ~ Scaling ~ SCAM ~ scar ~ scar face ~ scarifying ~ scarification ~ SCAT ~ SCC ~ SCCFG ~ SCD ~ SCF ~ SCG ~ Scharfenberg ~ schedule 1 ~ schedule 2 ~ schedule 3 ~ schedule 4 (SC4) ~ schedule 5 ~ schedule 8 (SC8) ~ scheduled maintenance ~ scheme plan ~ SCHLID ~ Schweerbau ~ Schwihag ~ scissor lift platform ~ scissors ~ scissors crossing ~ scissors crossover ~ SCM ~ SCMI ~ SCMMM ~ SCO ~ SCOC ~ SCOT ~ Scot. ~ Scotch ~ scotch block ~ scotch gauge Scotland Route ~ Scotrail ~ Scottish Region (ScR) ~ Scottish Region Tokenless Block (TB(SC)) ~ scour ~ scour assessment ~ scour holes scour priority rating ~ SCP ~ ScR ~ SCR ~ scrap rail ~ screen box ~ screening ~ screw coupling ~ screw dolly ~ screw fastening ~ screw reverser ~ screwspike ~ scroll irons ~ scrote controls ~ SCS ~ SCT ~ SCU ~ SCUK ~ SCVM ~ SCW ~ SCWID ~ SCWO ~ SCWS ~ SCZ ~ SD ~ SDA ~ SDC ~ SDD ~ SDEF SDG ~ SDH ~ SDLC ~ SDO ~ SDP ~ SDR ~ SDRE ~ SDRG ~ SDS ~ SDSC ~ SDT ~ SDV ~ SE ~ SE mode ~ SE&CR ~ SEA ~ Sea urchin (ZCA) ~ Seacow (YGA, YGB) ~ Seahare (ZCA) ~ Seahorse (ZCA) ~ seal ~ Seal (ZGA) ~ sealed release ~ sealing end (SE) ~ Sealion (YGH) ~ searchlight signal ~ SEAT RESVN ~ seated load ~ seated load factor ~ SEC ALERT ~ second class ~ second generation diesel multiple unit ~ second generation DMU ~ second line of response (SLOR) ~ Second Man ~ secondary drive ~ secondary gate ~ secondary impact ~ secondary insulation secondary line ~ secondary retention ~ secondary suspension ~ Secondman ~ SECRET ~ section ~ section A ~ section B ~ section C ~ section C notice ~ section D ~ section E ~ section F ~ section G ~ section gap ~ section H ~ section insulator (SI) ~ section J ~ section K ~ section L ~ section M ~ Section Manager ~ section N ~ section P ~ section proving ~ section Q ~ section R ~ section rail ~ section S ~ section signal ~ section SP ~ Section Supervisor ~ section switch ~ section T ~ section token ~ section U ~ section V ~ section W ~ section Y ~ section Z ~ sectional appendix (SA) ~ sectional route release ~ sectional running time (SRT) ~ sectioning ~ sector plate ~ secure counterpart ~ secure power supply ~ secured out of use ~ securing points ~ securing switches ~ SED ~ See-tru bolt ~ segregated on-street tramway ~ segregated section ~ segregated track segregation ~ SEI ~ SEIMU ~ seized joint ~ SEJ ~ Selby accident ~ SELCAB ~ SELCAT ~ selective door opening (SDO) ~ selective door operation self-accounting unit (SAU) ~ self-acting incline ~ self-acting inclined plane ~ self-discharging train (SDT) ~ self-lapping valve ~ self-maintaining brake system ~ self-normalising points ~ self-powered wireless remote distant signal (SWoRD) ~ self-propelled ~ self-propelled boom ~ self-restored points ~ self-steering bogie ~ self-supporting anchor (SSA) ~ self-tapping thimble ~ self-tensioning fastening ~ self-weight load ~ SELNEC ~ SELNEC PTE ~ SELRAP ~ SELV ~ SEM ~ semaphore disc signal ~ semaphore distant signal ~ semaphore signal ~ semaphore signalling ~ semaphore stop signal ~ semaphore subsidiary signal ~ semi ~ semi-automated train operation (STO) ~ semi-automatic signal semi-fast ~ semi-fast passenger train ~ semi-fast train ~ semi-open coach ~ semi-outside double slip diamond ~ semi-outside single slip diamond ~ semi-permanently coupled ~ semi-supported joint ~ semi-welded crossing ~ SEML ~ SEMMMS ~ SEMP ~ Senior Person in Charge of Possession (SPICOP) ~ sensitive edge ~ sensitive edge brake relay ~ sensitive relay ~ Sentinel ~ Sentinel card ~ Sentinel number ~ Sentinel scheme ~ Sentinel sponsor ~ separated green zone ~ SEPEX ~ sequential locking ~ sequential track circuits ~ SER ~ Serco ~ series bonding ~ Series 1 design range ~ Series 2 design range ~ serious injuries ~ SERP ~ Serpell report ~ service ~ service brake ~ service brake intervention limit (SBI limit) ~ service braking ~ service braking distance ~ Service Control Centre ~ Service Controller ~ Service Manager ~ Service Operator ~ service perturbation ~ service rail ~ service tunnel ~ Service Tunnel Transport System (STTS) ~ serviceable ~ serviceable rail ~ serviceable sleeper SET ~ set ~ set against ~ set back ~ set down only ~ set of points ~ set of switches ~ set rider ~ set speed ~ SETA ~ SETTOL ~ SEU ~ SEV COLD ~ SEV FLOOD ~ SEV HEAT ~ SEV SNOW ~ Seven Day Railway (7DR) ~ SEWCML ~ SEZ ~ SF ~ SF mode ~ SF6 ~ SFAIRP ~ SFD ~ SFN ~ SFNSG ~ SFO ~ SFP SFS ~ SFT SG ~ SGE ~ SGI ~ SGR ~ SGRC ~ SGT ~ SGV ~ SGVs ~ SGVS ~ SH ~ SH mode ~ SHA ~ shackle ~ Shadow Strategic Rail Authority (sSRA) ~ shadowing shaft ~ shallow concrete sleeper ~ shallow depth concrete sleeper ~ shallow depth switch ~ shared space ~ Shark (ZUA, ZUB, ZUP, ZUV, ZUW) ~ sharp angle crossing ~ sharp curve ~ shatter cracks ~ Shaw report, the ~ SHC ~ SHC clip ~ SHC fastening ~ SHDSL ~ shed ~ shed apron ~ shed plug ~ shed receptacle ~ shed road ~ shed switch ~ shed test magnet ~ Sheerness-on-Sea accident ~ Sheila ~ shelf relay ~ shell track ~ shelling shells ~ SHELT ~ Sherardizing ~ SHERPA ~ sheth ~ Shields Junction accident ~ shift ~ shims ~ shingle ~ shipper-owned container (SOC) ~ shoe ~ shoe box ~ shoegear ~ shoot ~ shooting ~ shooting a speed ~ shop fitted joint ~ shop made joint ~ shop weld ~ shore ~ Shore hardness ~ Shore hardness scale ~ shore supply ~ short base versine error ~ short circuit ~ short circuit bond ~ short circuiting bar short circuiting device (SCD) ~ short circuiting strap ~ short earth ~ short end ~ short formation ~ short formed ~ short notice isolation ~ short rail ~ short rail joint ~ short range colour light (SRCL) ~ short sleeper beam ~ short term planning – electronic data interface (STP EDI) ~ short term planning (STP) ~ short wavelength corrugations ~ short wheelbase ~ short working ~ Shortt, William Hamilton ~ Shortts No. 2 ~ shots shoulder ballast ~ shoulder hump ~ shoulder peak ~ shoulder peak services ~ shovel ~ shovel packing ~ Shrewsbury accident ~ Shrimp (YNP) shroud ~ SHRT ~ SHRT FRMD ~ shunt ~ shunt entry board ~ shunt limit ~ shunt move ~ shunt movement ~ shunt neck ~ shunt route ~ shunt signal ~ shunt spur ~ shunt token shunt-ahead signal ~ shunter ~ shunter's acceptance switch (SAS) ~ shunter’s assurance ~ shunter’s plunger ~ shunters release ~ shunting ~ shunting bell ~ shunting frame ~ shunting gong ~ shunting locomotive ~ shunting mode (SH) ~ shunting move ~ shunting movement ~ shunting pole ~ shunting signal ~ shut down ~ shut in ~ shuttle ~ shuttle valve ~ SHWW ~ SI ~ SIC ~ SICA ~ SICA LX ~ SICAT ~ Sick and Tired ~ SID ~ side ~ side arms ~ side bearer ~ side bearer block ~ side buffers ~ side contact ~ side contact conductor rail ~ side cutting gauge ~ side platform ~ side rail loader ~ side rollers ~ side swipe ~ side wall ~ side wear ~ side-to-back lights ~ sidebearers ~ sidecutting ~ sidelight ~ sidepost ~ sidepost insulator ~ sideswipe ~ sidetip ~ sidetip excavator ~ sidewear ~ sidewear gauge ~ sidewear scar ~ sidewear total ~ Sidewinder ~ siding ~ siding overrun ~ siding switch ~ SIDOS ~ SIDS ~ Siemens, Dr. Ernst Werner von ~ sierra ~ SIFE ~ SIFER ~ Sift ~ SIG ~ SIG CABL FLR ~ SIG FUNC PWR ~ SIGAS ~ sighting ~ sighting board ~ sighting distance ~ sighting distance chart ~ sighting hole ~ sighting point ~ sighting time ~ sign the road ~ signal ~ Signal and Telecommunications (S&T) ~ signal aspect ~ signal aspect sequence ~ Signal Assessment Tool (SAT) ~ Signal Assessment Tool detailed assessment (SAT/DA) ~ signal box (SB) ~ signal box boundary ~ signal box diagram ~ signal box diagram colours ~ signal box etiquette ~ signal box instructions ~ signal box notes ~ signal box panel ~ signal box simplifier ~ signal box special instruction ~ signal box suffixes ~ signal braking distance ~ signal bridge ~ signal cabin ~ signal element ~ signal exclusion zone (SEZ) ~ SIGNAL FLR ~ signal gantry ~ signal head ~ signal headway ~ signal hood ~ signal identification plate ~ Signal Lamp ~ signal memory ~ Signal Monitoring and Reporting to TRUST (SMART) ~ signal number ~ signal off indicator ~ signal over-run ~ signal over-run risk assessment (SORA) ~ signal overlap (O/L) ~ Signal Overrun Risk Assessment Tool (SORAT) ~ signal passed at danger (SPAD) ~ signal passed at stop (SPAS) ~ signal post (SP) ~ signal post replacement key ~ signal post replacement switch ~ signal post telephone (SPT) ~ signal profile ~ signal protection ~ signal rail ~ signal repeater ~ signal reversion ~ signal section ~ signal sighting ~ signal sighting committee (SSC) ~ signal sighting committee chairman ~ signal sighting form (SSF) ~ signal sighting survey ~ signal spacing ~ signal standback ~ signal standback allowance ~ signal stick ~ signal wire ~ signal wire adjuster ~ signal wire tensioner ~ signal(wo)man ~ signalbox (SB) ~ signalled ~ signalled direction ~ signalled route ~ SIGNALLER ~ Signaller ~ Signaller’s area ~ Signaller’s control device ~ Signaller’s display ~ Signaller’s Display Subsystem (SDS) ~ Signaller’s General Instructions (SGI) ~ Signaller’s panel ~ Signaller’s route list ~ Signaller’s workstation ~ signalling ~ Signalling and Telecommunications ~ signalling apparatus housing (SAH) ~ signalling centre (SC) ~ signalling circuit diagram ~ signalling control centre (SCC) ~ signalling control point ~ signalling control system (SCS) ~ signalling controls ~ signalling data logger ~ signalling design specification (SDS) ~ signalling diagram ~ signalling engineer ~ signalling equipment ~ signalling equivalent unit (SEU) ~ signalling facilities diagram ~ signalling fault team ~ signalling function ~ signalling headway ~ signalling inspector ~ Signalling Maintenance Assistant (SMA) ~ Signalling Maintenance Engineer (SME) ~ signalling maintenance specification (SMS) ~ signalling migration ~ signalling plan ~ signalling plan correlation ~ signalling plan survey ~ signalling power supply ~ signalling principles tester ~ signalling rail ~ signalling scheme ~ signalling scheme plan (SSP) ~ signalling shift manager ~ Signalling Solutions Ltd. (SSL) ~ signalling stretcher bar ~ signalling supply point (SSP) ~ signalling symbols ~ signalling system ~ signalling workstation ~ signalman ~ signals, railway track, explosive ~ SIGNET ~ signing a route ~ signing back ~ signing on point (SOP) ~ signing out ~ signing out a route ~ signing the book ~ signing the route ~ signs ~ signs related to automatic warning system (AWS) ~ signs related to cab signalling1 ~ signs related to electrification ~ signs related to enhanced permissible speed (EPS) ~ signs related to level crossings ~ signs related to lineside safety ~ Signs related to maintenance ~ signs related to operations1 ~ signs related to permissible speed (PS) ~ signs related to radio ~ signs related to signal post telephones (SPT) ~ signs related to signals ~ signs related to telephones ~ signs related to the Channel Tunnel Rail Link (CTRL) ~ signs related to tramways ~ signs related to TSRs and ESRs ~ SIGTAN ~ SIGWEN ~ SIIMS ~ SIL ~ silent death ~ silver bullets ~ Silver Command ~ silver migration ~ silver spots ~ Silverlink ~ SIM ~ SIMBIDS ~ SIMBIDS crossover ~ similar flexure ~ similar flexure turnout ~ SIMIS-W ~ SIMP ERR ~ simple catenary ~ simple feeding system ~ simplified bi-directional signalling (SIMBIDS) ~ simplified direct reporting (SDR) ~ Simplified Double Junction ~ simplifier ~ SIMU ~ simulation multiprocessor module (SMPM) ~ SIN ~ SINAC ~ SINC ~ SINCS ~ sine curve ~ single aspect ~ single aspect signal ~ single bank ~ single banker ~ single bank tamper ~ single bore tunnel ~ single brake pipe ~ single car ~ single car unit ~ single compound ~ single cut ~ single junction ~ single lead ~ single lead junction ~ single line ~ single line diagram (SLD) ~ single line gantry (SLG) ~ single line of way ~ single line section ~ single line spoil handling system (SLSHS) ~ single line token ~ single line working (SLW) ~ single line working by Pilotman ~ single link ~ single manned ~ single option development (SOD) ~ single pipe air brake ~ single piped ~ single rail ~ single rail bonding ~ single rail track circuit ~ single slip ~ single slip diamond ~ single slip switch diamond ~ single tongue catch point ~ single tongue trap (STT) ~ single tongue trap point ~ single track ~ single track cantilever (STC) ~ single way ~ single wire slot ~ single yellow (Y) ~ single yellow aspect ~ singling ~ SINMON ~ SINTROPHER ~ sinusoidal transition ~ SIO ~ SIP ~ siphon ~ siphon culvert ~ SIPS ~ SIS ~ SISA ~ SISS ~ SIT ~ site access cabin (SAC) ~ site access control ~ site access controller (SAC) ~ site access register ~ site clear message ~ site fitted joint ~ site Lookout ~ site made joint ~ site of special scientific interest (SSSI) ~ site of work ~ Site Person in Charge (SPC) ~ site supervisor ~ site technical query (STQ) ~ site warden (SW) site warden warning ~ SITS ~ SIU ~ SIVS ~ six bells ~ six foot ~ six hole ~ six hole joint ~ sixfoot ~ sixfoot back drive ~ sixfoot drain ~ sixfoot rail ~ sixfooting ~ sixty foot ~ SK ~ Skako ~ Skate (YDA) ~ skateboard ~ skeleton track ~ skew ~ skew back ~ skew level crossing ~ skew span ~ skew span length ~ skim dig ~ skip ~ skip train ~ skip-stopping ~ skipper ~ skirted fishplate ~ Skl 12 ~ Skl 14 ~ Skl 15 ~ SKM ~ Skull hook clip (SHC) ~ SkV ~ SkV-E ~ SkV-F ~ SkV-L50 ~ SkV-L80 ~ sky arms ~ SL ~ SL mode ~ SL&DHA ~ SLA ~ slab track ~ slack ~ slack adjuster ~ slag ~ slam door stock ~ slam doors ~ SLATTERN ~ slave arrestor(s) ~ slave rail ~ SLC ~ SLC platform ~ SLCC ~ SLD ~ SLE ~ SLED ~ sleeper ~ sleeper beam ~ sleeper blocks ~ sleeper bonker ~ sleeper bottom (SB) ~ sleeper crossing ~ Sleeper Delivery Train (SDT) ~ sleeper dogs ~ sleeper end restraint plates (SERP) ~ sleeper ends ~ sleeper gall ~ sleeper integrity tester (SIT) ~ sleeper nips ~ sleeper pad ~ sleeper slide ~ sleeper soffit ~ sleeper spacing ~ sleeper squaring ~ sleeper tongs ~ sleeper zero ~ sleepered lead ~ sleeping car ~ sleeping car train ~ sleeping dog ~ sleeping dog crossing ~ sleeping mode (SL) ~ sleeping policeman ~ sleet brush ~ sleet train ~ sleeves ~ SLEP ~ slew ~ slewing ~ SLF ~ SLG ~ SLHA ~ slide baseplate ~ slide baseplate distance block ~ slide baseplate jaw ~ slide baseplate jaw block ~ slide chair ~ slide chair distance block ~ slide table ~ slide-and-plug door ~ sliding buffer stop ~ sliding plug door ~ slim Jims ~ Slinger ~ slinger ~ slip ~ slip circle ~ slip coach ~ slip connection ~ slip coupling ~ slip plane ~ slip rings ~ slip road ~ slip switch ~ slipper ~ slipper baseplate ~ slipper insert ~ slipper pad ~ slipper run ~ slipper support ~ slipping structures ~ SLK ~ SLL ~ SLO ~ SLOA ~ SLOE ~ slope ~ slope failure ~ slope of formation ~ slope stability hazard index (SSHI) ~ SLOR ~ slot ~ slotting ~ slotted joint points ~ slotted semaphore signal ~ slough ~ slow (S) ~ slow acting relay ~ slow line (SL) ~ slow to operate relay ~ slow to release relay ~ SLR ~ SLS ~ SLSC ~ SLSHS ~ SLTC ~ SLU ~ slue ~ slueing ~ slue convention ~ slug ~ sluing ~ slurried ballast ~ slurry ~ slurry bed ~ slurry spot ~ SLW ~ SLxx ~ SM ~ SM(T) ~ SMA ~ small part steel (SPS) ~ small plant ~ smallman clip ~ smalls ~ SMART ~ Smartlock ~ SMB ~ SMC ~ SME ~ SMFD ~ SMG ~ SMGS ~ SMIS ~ smoke board ~ smoke plate ~ smokebox ~ smooth lining ~ SMOS ~ SMOWS ~ SMP ~ SMPS ~ SMR ~ SMS ~ SMSE ~ SMT ~ SMTH ~ SMVT ~ SmW ~ SMWI ~ SN ~ SN mode ~ Snakegrid ~ snap-through buckle ~ SNCB ~ SNCF ~ SNCI ~ SNEP ~ snifting valve ~ SNIP ~ snipe cut ~ snow ~ snow blower ~ snow fence ~ snow hut ~ snow plough ~ snow shed ~ snow, wrong kind of ~ snowman ~ SNR ~ SNR COND ~ SNRN ~ SNRP ~ snubbing device ~ snuffer tube ~ SNWPT ~ SNX ~ SO ~ so far as is reasonably practicable (SFAIRP) ~ SO supplementary drive ~ SOAP ~ SOAR ~ SOC ~ SOCAT ~ SOCO ~ SOD ~ SODA ~ SoFA ~ Soffit ~ soffit erosion ~ soffit pad ~ soft spot ~ soft tilt off ~ softwood sleeper ~ Soham explosion ~ SOI ~ soil investigation (SI) ~ soil slope hazard index (SSHI) ~ Solari ~ Sole (ZCA, ZCO) ~ solebar ~ soleplate ~ solid state interlocking (SSI) ~ soling ~ solum ~ SOM ~ somersault signal ~ Sonneville system ~ Sonning Cutting accident ~ SONW ~ SOP ~ SOR ~ SORA ~ SORAT ~ sorbite ~ sorting sidings (SS) ~ SOS ~ SOT ~ SOTF ~ source record ~ South Central ~ South West Trains ~ South Western Railway ~ Southall accident ~ Southeastern ~ Southeastern Trains (SET) ~ Southern ~ Southern Measurement Train (SMT) ~ Southern Railway (SR) ~ Southern Region (SR) ~ SOVRN ~ SOWC ~ SoWoS ~ SOYSPAD ~ SP ~ SPA ~ space ~ spacer block ~ Spacia ~ spacing ~ SPAD ~ SPAD alarm ~ SPAD category ~ SPAD I ~ SPAD indicator ~ SPAD latch ~ SPAD severity ~ SPAD severity category ~ SPAD severity ranking ~ SPAD trap ~ spade ~ spade ended steel sleeper ~ SPADMIS ~ SPADRAM ~ SPADWEB ~ spalling ~ span ~ span length ~ span-wire ~ spandrel ~ spandrel wall ~ SPARCS ~ spare lever (S) ~ SPARK ~ sparkler ~ Sparky ~ SPAS ~ spate ~ spated ~ spate indicator ~ SPC ~ SPC-G ~ SPC-GL ~ SPC-GMSL ~ SPC-MSL ~ SPC-open ~ SPD ~ special ~ special crossing reminder appliance ~ special earthworks examination ~ special instruction notice (SIN) ~ special notice (SN) ~ special operating instruction (SOI) ~ special reduced clearance ~ special reduced passing clearance ~ special reduced platform clearance ~ special reduced structure clearance ~ special running notice ~ special signal sighting committee (SSSC) ~ special speed restriction board (SSRB) ~ special traffic notice (STN) ~ special train ~ special train notice ~ specially monitored driver risk register ~ specials ~ specific case ~ specific transmission module (STM) ~ spectacle glass ~ spectacle plate ~ speed ~ speed board ~ speed code ~ speed constraints chart ~ speed constraints diagram ~ speed control after tripping (SCAT) ~ speed indicator (SI) ~ speed of divergence ~ speed profile ~ speed restriction ~ speed set ~ speed supervision ~ Speller Act ~ Speller Amendment ~ SPENO ~ Speno ~ spent ballast ~ SPETU ~ SPI ~ SPICOP ~ spider ~ spider plate ~ spigot ~ spike ~ spike extractor ~ spike fastening ~ spike lock ~ spiking ~ spine panel ~ Spinnaker ~ SPIR ~ SPL REGS ~ splasher ~ splay ~ splice ~ splice plate ~ splice rail ~ splice rail nose ~ splice to heel check ~ splicing ~ split ~ split bearer layout ~ split bearer S&C ~ split bearer S&C layout ~ split bearer switch and crossing ~ split bearer switch and crossing layout ~ split detection ~ split equal turnout ~ split switch ~ split three throw ~ split timbered ~ split turnout ~ splitting banner repeater ~ splitting banner repeater signal ~ splitting banner repeating signal ~ splitting distant signals ~ splitting distants ~ splitting the points ~ SPM ~ SPMT ~ SPoF ~ spoil ~ spoil bank ~ spoil heap ~ spoil tip ~ spoil to bank ~ spoil train ~ spoil wagon ~ Sponsor ~ spoon ~ spoon points ~ Spooner's rail joint ~ SPORTIS ~ SPORTS ~ spot bid ~ spot moulds ~ spot resleepering ~ SPOTIS ~ spotted dick ~ SPP ~ sprag ~ Sprague, Frank Julian ~ spread lens ~ spreader bar ~ spreadlight ~ spreadlight lens ~ SPRG ~ spring applied parking brake (SAPB) ~ spring buckle ~ spring clip ~ spring crossing ~ spring hook clip (SHC) ~ spring plank ~ spring points ~ spring switch ~ spring tensioner ~ spring tensioner anchor (STA) ~ spring toggle ~ spring wing crossing ~ springing ~ Sprinter ~ sprinter (SP) ~ SPRS ~ SPS ~ SPT ~ SPTA ~ SPTE ~ SPU ~ spuller ~ spur ~ SPV ~ SPW ~ SPWEE ~ SPX ~ SPX Rail Systems ~ SQEP ~ squadron tamping ~ square ~ square crossing ~ square span ~ square span length ~ square wheel ~ squaring ~ squaring off ~ squash ~ squat ~ Squid (ZDA) ~ squirt, the ~ SR ~ SR CNCL ~ SR mode ~ SR&EE ~ SRA ~ SRAM ~ SRAWS ~ SRB ~ SRCC ~ SRCL ~ SRCT ~ SRE/PW ~ SRE/PW drawings ~ SREE ~ SRFI ~ SRG ~ SRI ~ SRM ~ SRNTP ~ SRP ~ SRPSU ~ SRR ~ SRRT ~ SRS ~ SRT ~ SS ~ SS TB ~ SSA ~ SSAA ~ SSADS ~ SSC ~ SSCI ~ SSD ~ SSDC ~ SSF ~ SSFTA ~ SSG ~ SSHA ~ SSHI ~ SSI ~ SSIC ~ SSICA ~ SSIDES ~ SSIDWS ~ SsiFT ~ SSIHA ~ SSIM ~ SSISIM ~ SSL ~ SSM ~ SSMS ~ SSO ~ SsoW ~ SSOWP ~ SSOWPS ~ SSP ~ SSPM ~ SSR ~ sSRA ~ SSRB ~ SSRG ~ SSRS ~ SSSC ~ SSSI ~ SST ~ SSTD ~ SSTIS ~ SSV ~ SSWT ~ ST ~ ST-SES ~ St. Andrew’s cross ~ St. George’s cross ~ STA ~ stable ~ stabled ~ stabling ~ stabling light ~ stabling point ~ stabling sidings ~ STABS ~ STAFF ~ Staff ~ staff and ticket working ~ staff crossing ~ STAFF DUTY ~ STAFF ERR ~ staff instrument ~ STAFF MSN ~ staff responsible mode (SR) ~ staff working ~ STAG ~ stage ~ stage plans ~ stagework joint ~ stageworks ~ stageworks plan ~ stagger ~ stagger change ~ stagger effect ~ stagger of knuckles ~ staggered joint ~ staggered platforms ~ staging ~ staging book ~ staging joint ~ stainless steel deposit ~ staircase of speeds ~ staith ~ stakeholders ~ STAKKAbox ~ STAMP ~ stanchion ~ standage ~ standard ~ standard alphanumeric route indicator (SARI) ~ standard class ~ standard deviation (SD) ~ standard differential speed restriction ~ standard differential warning indicator ~ standard gauge ~ standard gauge railway ~ standard gauge track ~ standard indicator (SI) ~ standard length unit (SLU) ~ standard loading gauge ~ standard penetration test (SPT) ~ standard possession opportunity ~ standard quota assessment ~ standard rail ~ standard rail length ~ standard route indicator (SRI) ~ standard short rail ~ standard weld ~ standards ~ standards freeze ~ standback ~ standby mode (SB) ~ standing at signal ~ Standing Committee on Structural Safety ~ standing off ~ STANOX ~ Stansted Express ~ Staplehurst accident ~ STAR ~ star clip ~ star crack ~ Star Track ~ Starfer ~ Starfish (ZCO) ~ StARLink ~ start of mission (SoM) ~ starter ~ starter signal ~ starting against signal signal passed at danger (SASSPAD) ~ starting against signal SPAD ~ starting off yellow signal passed at danger (SOYSPAD) ~ starting off yellow SPAD ~ starting signal ~ statement of national regulatory provisions (SNRP) ~ static ~ static analysis ~ static brake test ~ static cone penetrometer test (CPT) ~ static crosslevel ~ static electrical clearance ~ static envelope ~ static frequency converter (SFC) ~ static gauge ~ static gauging ~ static level ~ static load gauge ~ static offset ~ static speed profile (SSP) ~ static track gauge ~ static track geometry ~ static twist ~ static vehicle gauge ~ station ~ station access agreement ~ Station Adoption Scheme ~ Station Assistant (Train Services) duty (SATS duty) ~ station box ~ station category ~ station change ~ station concourse ~ station envelope ~ station facility operator (SFO) ~ station grounds ~ station information and surveillance systems (SISS) ~ station limits ~ station pedestrian crossing (SPC) ~ station pilot ~ station stop ~ station throat ~ station train radio ~ station work complete signal ~ station working ~ station-related level crossing ~ statutory hydraulic boiler test ~ STB ~ STC ~ STE ~ steady state maintenance ~ steam brake ~ steam heat ~ steam heating ~ STEAM LOCO ~ steam locomotive ~ steam traction ~ steam turbine locomotive ~ stears ~ STED ~ steel key ~ steel relay ~ steel sleeper ~ steel sleeper evolution ~ steel sleeper relaying (SSR) ~ steel-topped rail ~ steelwork only ~ steeple coping ~ STEF ~ STELLA ~ stencil indicator (SI) ~ Stent sleeper ~ step ~ step gauge ~ step moulds ~ step plate junction ~ step potential ~ step rail ~ step x ~ step x braking ~ Stephenson gauge ~ Stephenson valve gear ~ Stephenson, George ~ Stephenson, Robert ~ stepped fishplate ~ stepped gauge ~ stepped weld ~ stepping ~ stepping distance ~ STEPS ~ stereo oblique aerial photography (SOAP) ~ Stevens rail ~ stewardship ~ Stewarton accident ~ STEX ~ stick ~ stick and bubble ~ stiff ~ stillage ~ Stingray (YGA, YGB) ~ stirrup frame ~ stirrup signal frame ~ stitch wire ~ STK ~ STkm ~ STM ~ STM European mode (SE) ~ STM national mode (SN) ~ STN ~ STN FIRE ~ STN FLOOD ~ STN MISHAP ~ STN OTHER ~ STO ~ stoat ~ Stoat’s Nest accident ~ Stoats Nest control ~ stock ~ stock and crew change ~ stock book ~ stock fencing ~ stock rail ~ stock rail bolt ~ stock rail front ~ stock rail set ~ STOCK USED ~ stone ~ stone block sleeper ~ Stone Faiveley ~ stone guard ~ stone prop ~ stone sleepers ~ stoneblower ~ stoneblowing ~ stop ~ stop and caution ~ stop and proceed ~ stop aspect ~ stop block ~ stop board ~ stop indicator ~ stop loop ~ stop order ~ stop over distant ~ stop signal ~ stopper ~ stopping train ~ Stops ~ STOPS ~ storage sidings ~ STORM ~ Stott criteria ~ Stott report ~ stovepipe ~ stow position ~ Stowell’s diamond ~ Stowmarket control ~ STP ~ STP EDI ~ STP SCHED ~ STPE ~ STPR ~ STQ ~ STR ~ Str. ~ STRAD ~ straddle switches ~ straddle trap points ~ straddle traps ~ straight air brake ~ straight cut switch ~ straight fishplate ~ straight planed ~ straight planed switch ~ straight post signal ~ straight road ~ straight to curve transition ~ straight track ~ straight-ahead route ~ straight-ahead route ~ STRAIT ~ stranding ~ strap ~ strap out ~ strapping out ~ strap rails ~ Strapman ~ Strapmen ~ strapping ~ Strategic Freight Network (SFN) ~ strategic materials ~ Strategic Rail Authority (SRA) ~ strategic route section (SRS) ~ strategic spares ~ stray current ~ STRC ~ street running track ~ street track ~ strengthened ~ stress condition ~ stress free ~ stress free temperature (SFT) ~ stress graded ~ stress naturally ~ stress restoration ~ stress transfer block ~ stress transition length ~ stressed ~ stressed rail ~ stressing ~ stressing certificate ~ stressing diagram ~ stressing plan ~ stressing naturally ~ stressing point weld ~ stretcher ~ stretcher bar ~ stretcher bond ~ strike in ~ strike in point (SIP) ~ strike out ~ strike out point (SOP) ~ strike-in treadle ~ string ~ string course ~ string line ~ stringers ~ strip heater ~ strip pad ~ stroke post ~ STRU ~ Structural subsystem ~ structure ~ structure assessment ~ structure assessment code (of practice) ~ structure bond ~ structure clearance ~ structure evaluation ~ structure gauge ~ structure gauging ~ Structure Gauging Train (SGT) ~ Structure Gauging Train 2 (SGT2) ~ Structure mounted outdoor switchgear (SMOS) ~ STRUCTURES ~ structures manager ~ STS ~ STT ~ STTOC ~ STTS ~ Stuart rail key ~ stub axle ~ stub end ~ stub switch ~ Stumec ~ Stumec wagon (YFA, YFB, YFO, YBA, YBB, YBO, YBP, YBQ, YMA, YMO) ~ Sturgeon (YBA, YBB, YBO, YBP, YBQ) ~ STW ~ SU ~ SUB ~ sub-formation ~ sub-ganger ~ sub-overlap ~ sub-route ~ sub-route release data ~ sub-section ~ sub section ~ subsection ~ sub-sponsor ~ sub-station gap ~ sub-surface line ~ sub-surface station ~ sub. ~ subgrade ~ subitisation ~ submarine ~ subsidiary route indicator (SRI) ~ subsidiary signal ~ subsidiary timetable ~ subsidiary timetable change ~ substandard protection ~ substation ~ substructure ~ subsystem ~ subterranean fire ~ suburban line ~ subway ~ SuDS ~ sugar ~ suicide pit ~ Suicides and Open Verdicts on the Railway Network Project (SOVRN) ~ suit ~ sulfur print ~ sulphur print ~ SULTAN ~ summit ~ sun locking ~ SUN OBSCUR ~ Sun. ~ sunflower ~ SuO ~ super red ~ Super Sprinter ~ Super Tench (FJA) ~ super tensioned ~ super tensioned catenary ~ Super Voyager ~ supercapacitor ~ superelevation ~ superheater ~ superheater tubes ~ superheating ~ Superlev ~ superloc. ~ superstructure ~ supervised ~ supervised location (SvL) ~ supervising point ~ supervisor visual track inspection ~ supervisor’s plain line inspection ~ Supervisory control and data acquisition (SCADA) ~ supplementary audible warning device (AWD)supplementary conductor ~ supplementary detector ~ supplementary drive ~ supplementary notice ~ supplementary operating notice ~ supplementary ventilation system (SVS) ~ SUPPLIES ~ SUPPLY FLR ~ support coach ~ supported joint ~ supported monorail ~ suppression ~ surcharge ~ Surelock ~ surface concrete troughing (SCT) ~ surface length (SL) ~ surface line ~ surface route ~ surface stock ~ surfing ~ surveys ~ survival space ~ suspect ~ suspended girder rail ~ suspended joint ~ suspended monorail ~ suspension packings ~ Sustrans ~ SVC ~ SVGD ~ SVI ~ SvL ~ SvL_E ~ SVP ~ SVR ~ SVS ~ SW ~ SWA ~ swag ~ swamping ~ swan neck ~ swan neck insulation ~ swap body ~ swap body vehicles ~ SWARMMS ~ SWAT ~ sway ~ SWEAR ~ sweating the asset ~ sweep ~ sweep ratio ~ SWELTRAC ~ swept envelope (SE) ~ swept path ~ SWG ~ SWGPA ~ SWIFT ~ SWIM ~ SWIMCo ~ SWIMU ~ swing bridge ~ swing link bogie ~ swing motion bogie ~ swing nose ~ swing nose crossing (SNX) ~ swinger ~ swinging overlap ~ SWISS ~ switch ~ switch anchor ~ switch and crossing (S&C) ~ switches and crossings ~ switch and crossing layout (S&C layout) ~ switch and crossing manufacturer’s drawing ~ switch and crossing rail (S&C rail) ~ switch and crossing survey (S&C survey) ~ switch and crossing tamper (S&C tamper) ~ switch and crossing unit (S&C unit) ~ switch blade ~ switch bolt ~ switch clamp ~ switch climb ~ switch climbing derailment ~ switch clip ~ switch detection ~ switch diamond ~ switch distance blocks ~ switch drive ~ switch entry angle ~ switch fronts ~ switch half set ~ switch heater ~ switch heating ~ switch heel ~ switch heel angle ~ switch heel offset ~ switch lead ~ switch letters ~ switch lever ~ switch motor ~ switch nomenclature plate ~ switch opening ~ switch operating mechanism ~ switch panel ~ switch planing ~ switch plate ~ switch radius ~ switch rail ~ switch rail extension piece ~ switch rail set ~ switch rail vertical set ~ switch rollers ~ switch securing block ~ switch slide chairs ~ switch timber ~ switch tip ~ switch toe ~ switch toe bearers ~ switch toe front ~ switch toe timbers ~ switch type ~ switch, parts of ~ switched off ~ switched out ~ Switchglide ~ switching station ~ Switchlock ~ SWL ~ SWL1 ~ SWL2 ~ SWL3 ~ SWML ~ SWON ~ SWoRD ~ SWOT ~ SWP ~ SWS ~ SWT ~ SWTH ~ SWW ~ SX ~ Sykes ~ Sykes Electro-mechanical Warning System ~ Sykes, William Robert ~ symmetrical switch ~ sympathy possession ~ synchronous motor ~ syphon ~ SYPTE ~ System Controller ~ system failure mode (SF) ~ system height ~ System Management Centre (SMC) ~ System Operator (SO) ~ System Review Panel ~ system safety case ~ System Safety Risk Group (SSRG) ~ system selector ~ systems-based design ~ SZ

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T

T ~ T board ~ T spanner ~ T-12 ~ T-14 ~ T-6 ~ T-8 ~ T-COD ~ T-piece ~ T-section stiffener ~ T-x ~ T/O ~ T&C ~ T&H ~ T&L ~ T&RS ~ T&RSMD ~ T&V ~ T&WA ~ T+x ~ T1 ~ T12 ~ T12 protection ~ T2 ~ T2000 ~ T22 ~ T2F ~ T3 ~ T3a ~ T4 ~ T4 Trailer ~ T5 Trailer ~ T72 ~ TA ~ TAA ~ TAB ~ table incline ~ table of signal routes ~ tablet ~ TABS ~ TAC ~ tache ovale ~ tackling chain ~ TAD ~ TADS ~ TAF ~ TAF TSI ~ TAG ~ tag ~ tail ~ tail cable ~ TAIL LAMP ~ tail lamp ~ tail rope ~ tail-lamping ~ TAIM ~ Taith ~ take-down ~ TAKEBACK ~ taken at half-price ~ taken at the bells ~ talking past ~ TAMANS ~ TAMAR ~ tamp, regulate and DTS ~ tamper ~ tamper driver ~ tamper operator ~ tamper siding ~ tamper technician ~ tamping ~ tamping and lining (T&L) ~ tamping and lining machine ~ tamping bank ~ tamping cycle ~ tamping machine ~ tamping tine ~ TAN ~ Tanalisation ~ tandem ~ tandem lift ~ tandem turnout ~ tandem working ~ tang ~ tangent point (TP) ~ tangent track ~ tangential crossover ~ tangential switch ~ tango ~ tango coat ~ tank container ~ tank engine ~ tank locomotive ~ tank wagon ~ TAP ~ tap changer ~ TAP TSI ~ TAPAS ~ tapper key ~ tappet ~ tappet frame ~ tappet locking ~ tapping pin ~ taps ~ TAR ~ TARDIS ~ TARE ~ tare ~ tare deflated ~ tare weight ~ target ~ TARQUIN ~ TAS ~ TASC ~ task analysis ~ task briefing (TB) ~ task briefing sheet (TBS) ~ TASR ~ TASS ~ TASS balise ~ TASS/TILT ~ TAT ~ Tattenhall Junction accident ~ Tattersall, A.E. ~ Taunton accident ~ TAV ~ TAWS ~ Tay Bridge accident ~ TB ~ TB(SC) ~ TBA ~ TBC ~ TBCK ~ TBE ~ TBEWG ~ TBF ~ TBI ~ TBL ~ TBM ~ TBR ~ TBS ~ TBSK ~ TBSO ~ TBTC ~ TBTCS ~ TBW ~ TC ~ TC FAILURE ~ TC1 ~ TCA ~ TCAG ~ TCAID ~ TCB ~ TCBR ~ TCC ~ TCCM ~ TCCOS ~ TCCS ~ TCE ~ TCF ~ TCI ~ TCIC ~ TCIS ~ TCK ~ TCL ~ TCM ~ TCMI ~ TCMS ~ TCN ~ TCOC ~ TCPS ~ TCR ~ TCRAG ~ TCRC ~ TCS ~ TCS-F ~ TCS-M ~ TCSD ~ TCSDC ~ TCSU ~ TCT ~ TD ~ TD berth ~ TD stepping ~ TD-D ~ TD-T ~ TDA ~ TDB ~ TDC ~ TDG ~ TDIC ~ TDL ~ TDM ~ TDMA ~ TDN ~ TDR ~ TDS ~ TDSC ~ TE ~ tea ~ TEB ~ TEC ~ technical assessment ~ Technical Engineering Service Company (TESCO) ~ technical headway ~ technical query (TQ) ~ technical riding inspector ~ technical running time (TRT) ~ technical specification for interoperability (TSI) ~ technical staff ~ technical workscope ~ technician’s console ~ technician’s terminal ~ TECM ~ Tectona grandis ~ TED ~ TEDE ~ TEE ~ tee piece ~ tee-feed ~ tee-headed bolt ~ TEF ~ TEFC ~ TEH ~ telecoms. ~ telecommunications ~ telegraph ~ telegraph codes ~ telegraph speaking instrument ~ telemetry ~ telephone concentrator ~ telephone protected level crossing (TLC) ~ telescoping ~ tell tale ~ TEM ~ temporary ~ temporary approach control ~ temporary approved non-compliance ~ temporary block working (TBW) ~ temporary bond ~ temporary continuity jumper ~ temporary isolation ~ temporary level crossing ~ temporary magnet ~ temporary non-compliance (TNC) ~ temporary panel ~ temporary speed restriction (TSR) ~ temporary track ~ temporary way ~ temporary works ~ TEMPRO ~ TEN ~ Tench (YPA) ~ tender ~ tender engine ~ tender first ~ TENE ~ tenfoot ~ ten foot ~ tenfoot drain ~ TENS ~ TENS route ~ tension length (TL) ~ Tensorex C+ ~ tensors ~ TEP ~ TEPE ~ TER ~ TERF ~ TERFF ~ TERFN ~ term contractor ~ terminal ~ terminal end ~ terminal line ~ terminal platform ~ terminal single line ~ terminal station ~ terminating train ~ termination board (T board) ~ termination indicator ~ terminus ~ terminus station ~ TERN ~ Terram ~ Territory ~ TES ~ TESCO ~ TESG ~ TESS ~ test log ~ test magnet ~ test panel ~ test service car ~ Test Site A (TSA) ~ Test Site B (TSB) ~ test train ~ tester ~ Tester in Charge (TIC) ~ testing ~ testing and commissioning (T&C) ~ testing certificate ~ testing copies ~ testing pinks ~ testing plan ~ testing strategy ~ TET ~ TETRA ~ TETS ~ TEU ~ TEW ~ TEW Engineering ~ TF ~ TF25 ~ TFC ~ TfGM ~ TfGMC ~ TFH ~ TFL ~ TfL ~ TfL Rail ~ TFM ~ TFR ~ TFS ~ TfW ~ TG ~ TGA ~ TGCS ~ TGCS+ ~ TGERI ~ TGM ~ TGP8 gauge ~ TGP8 track gauge ~ TGR ~ TGS ~ TGSD ~ TGV ~ TH ~ Th ~ Thales ~ Thames Trains (TT) ~ Thameslink ~ Thameslink 2000 (TL2000, TL2K) ~ Thameslink core section ~ Thameslink Programme ~ The Railway Engineering Company Limited (TRE) ~ theatre route indicator ~ theodolite straight ~ thermal stress ~ thermal stresses ~ Thermit ~ Thermit weld ~ thermite ~ thick based baseplate ~ thick based chair ~ thick web switch ~ thimble ~ third class ~ third rail ~ third rail electrification ~ third rail insulator ~ third rail tamper ~ Third Way ~ Third Way analysis ~ Thirsk accident ~ Thomas Hughes rail ~ three armed bandit ~ three aspect colour light signal ~ three aspect signal ~ three aspect signalling ~ three aspect to four aspect transition ~ three link coupling ~ three point lining ~ three throw ~ three-piece bogie ~ three-state banner repeating signal ~ throat ~ thrombosis ~ through ~ through air brake ~ through alignment ~ through alignment design (TAD) ~ through bearers ~ through carriage ~ through connection ~ through line ~ through piped ~ through platform ~ through routes ~ through service ~ through siding ~ through station ~ through testing ~ through ticketing ~ through timbers (TT) ~ throughbolt ~ throw ~ throw back ~ throw bar ~ thrown ~ thrown envelope ~ THU ~ Thumper ~ Thunderbirding ~ Thunderbirds ~ thyristor ~ TI ~ TI21 ~ TIC ~ TIC2 ~ TICA ~ ticket ~ TICKET IRR ~ ticket line ~ ticket working ~ TiCLeD ~ TID ~ tie ~ TIE ~ tie bar ~ tie rod ~ tie ropes ~ tie wire ~ tie-rods ~ tied anchor ~ tied point ~ tied timber (TT) ~ Tier 1 ~ Tier 2 ~ TIF ~ Tight Clearance Database (TiCLeD) ~ tight curve ~ tight gauge ~ tight joint ~ tight joint fishplate ~ tight plated joint ~ tight rail joint ~ TIIS ~ Tildawn ~ Tildawn lanterns ~ tilt ~ tilt actuators ~ tilt authorisation and speed supervision system (TASS) ~ tilt authorisation and speed supervision system balise (TASS balise) ~ tilt authority ~ tilt control system (TCS) ~ tilt failed (TF) ~ tilt for comfort (TFC) ~ tilt inhibit ~ tilt locked ~ tilt neutral ~ tilt passive ~ tilt prohibited zone (TPZ) ~ tilt system ~ tilting train ~ TIM ~ TIMARR ~ timber bearers ~ timber dogs ~ timber ends ~ timber nips ~ timber rake ~ timber track ~ timber wind ~ timbering ~ timbers ~ Timbrel ~ time division multiplex (TDM) ~ time element relay (TER) ~ time interval working ~ time of operation locking ~ time out ~ time release ~ timed at ~ timed release ~ timed to a stand ~ timer ~ timetable (TT) ~ timetable change ~ Timetable Change Assurance Group (TCAG) ~ Timetable Change Risk Assessment Group (TCRAG) ~ Timetable Planning Rules (TPR) ~ TIMI ~ timing load (TL) ~ timing off ~ timing point ~ TIN ~ tin sleeper ~ tines ~ TIOS ~ tip ~ TIP ~ TIPLOC ~ TIPP ~ tipping out ~ TIPS ~ TIR ~ TIS ~ TISE ~ TISP ~ TIT ~ TIU ~ TIV ~ TIW ~ TJ ~ TJx ~ TJFx ~ TK ~ TL ~ TL2000 ~ TL2K ~ TLA ~ TLC ~ TLIC ~ TLV ~ TM ~ TMC ~ TMCC ~ TMD ~ TMD(D) ~ TMD(E) ~ TME ~ TMG ~ TML ~ TMM ~ TMO ~ TMO(B) ~ TMP ~ TMR ~ TMS ~ TMST ~ TMTH ~ TMZ ~ TN ~ TN-C ~ TN-C-S ~ TN-S ~ TNC ~ TNM ~ TNP ~ TnT ~ TO ~ TO S/LINE ~ TOC ~ TOC DIRECT ~ TOC MISHAP ~ TOC on self ~ TOC OTHER ~ TOC REQST ~ TOC UNEX ~ TOD ~ toe ~ TOE ~ toe load ~ toe opening ~ toe timbers ~ toe to nose ~ toe to nose dimension ~ toe to toe ~ toe to toe dimension ~ toe wall ~ TOES ~ TOG ~ TOHD ~ TOIM ~ token ~ token catcher ~ token control point ~ token exchange ~ token exchange equipment ~ token exchange point (TEP) ~ TOKEN FLR ~ token instrument ~ token section ~ token transfer magazine ~ tokenless block ~ TOL ~ tolerable risk ~ Tollerton Control ~ TOLO ~ TOM ~ tommy ~ tommy dodd ~ TOMS ~ TOMSC ~ tongue ~ tongue lipping ~ tongue rail ~ tons per yard ~ tool van ~ TOOS ~ top ~ TOP ~ TOp ~ top and left rule ~ top and tail ~ top and tail working ~ top ballast ~ top chord ~ top contact ~ top contact conductor rail ~ top endless haulage ~ top nutting ~ top of ramp (TOR) ~ top planing ~ top plate ~ top rail ~ top shift ~ TOPE ~ Tope (ZCV, ZDV) ~ topographical survey ~ topping ~ TOPS ~ TOPS 2000 ~ TOPS code ~ TOPS list ~ TOPSTRAN ~ TOR ~ ToRFM ~ TORG ~ torque arm ~ torque prevailing nut ~ torque tightened ~ TORR ~ torsional back drive ~ torsional stiffness ~ torsional supplementary drive ~ TORUS ~ total load ~ total loading ~ total obscuration ~ Total Operations Processing System (TOPS) ~ total tonnage capability ~ Toton signal ~ Tottenham North Junction accident ~ TOU ~ touch potential ~ tourist ~ towing bar ~ TOWS ~ TP ~ TP Hut ~ TP&SN ~ TP&V ~ TPAV ~ TPC ~ TPCMS ~ TPE ~ TPEG ~ tph ~ TPH ~ TPI ~ TPL ~ TPMS ~ TPO ~ TPoD ~ TPPP ~ TPR ~ TPS ~ TPS CANC ~ TPS Rail ~ TPT ~ TPV ~ TPWS ~ TPWS indicator ~ TPWS loop ~ TPWS OS ~ TPWS outer signal ~ TPWS-A ~ TPWS-E ~ TPWS+ ~ TPWSSA ~ TPZ ~ TQ ~ TQM ~ TQN ~ TQS ~ TQSUM ~ TR ~ TR mode ~ TRA ~ TRA alarm ~ Trac Gopher ~ Trac Rail Transposer (TRT) ~ TRACA ~ TRACE ~ Tracer ~ track ~ track access ~ Track Access Agreement (TAA) ~ track access charges ~ track access contract ~ Track Access Controller (TAC) ~ track access device (TAD) ~ track alignment ~ Track Asset Manager (TAM) ~ track ballast ~ track bed ~ track bobbing ~ track bond ~ track brakes ~ track buckle ~ track cable ~ track cant ~ track category ~ track centre ~ track centre line ~ Track Chargehand ~ Track Chargeman (TCM) ~ track circuit (TC) ~ track circuit actuator (TCA) ~ track circuit actuator interference detector (TCAID) ~ track circuit assister (TCA) ~ track circuit assister interference detector (TCAID) ~ track circuit block (TCB) ~ track circuit block principles ~ Track Circuit Block Regulations ~ track circuit bob ~ track circuit bond ~ track circuit continuity welding ~ track circuit indicator ~ track circuit interrupter (TCI) ~ track circuit maximum length ~ track circuit memory ~ track circuit minimum length ~ track circuit operating clip ~ track circuit operating device (T-COD) ~ track circuit rail ~ track circuit tails ~ track circuited ~ track construction ~ Track Design Handbook, the ~ Track Design Manual, the (TDM) ~ track diagram ~ track drain ~ track drainage survey ~ track end ~ track engineering forms (TEFxxxx) ~ track fastening ~ track fault ~ track feeder ~ track fixings ~ track fixity ~ TRACK FLT ~ track forces ~ track gauge ~ track geometry ~ track geometry recording ~ track geometry recording data ~ track geometry recording train ~ track geometry trace ~ track gradient ~ Track Grip 60 ~ track identity (TID) ~ Track Inspection Coach, the (TIC) ~ track inspection train (TIT) ~ track inspection vehicle (TIV) ~ track interval ~ track irregularity ~ track isolating switch (TIS) ~ track jumping ~ track layout ~ track level ~ track locking ~ track machine guidance (TMG) ~ track maintenance ~ Track Maintenance Engineer (TME) ~ track miles ~ track names ~ track noise ~ track panel ~ track paralleling hut (TPH, TP Hut) ~ track patrols ~ track patrolling ~ Track Production Manager ~ track quality (TQ) ~ track quality band ~ Track Quality Supervisor (TQS) ~ track recording ~ track recording coach (TRC) ~ track recording data ~ track recording train ~ track recording trolley ~ track recording unit (TRU) ~ track recording vehicle (TRV) ~ track relay (TR) ~ track relaying ~ track relaying machine (TRM) ~ track relaying train (TRT) ~ track renewal ~ track renewal company (TRC) ~ track renewal contractor ~ track renewal item ~ track renewals unit (TRU) ~ Track Safety Co-ordinator (TSC) ~ track safety competency ~ track section ~ Track Section Manager (TSM) ~ track sectioning cabin (TSC) ~ track sectioning location (TSL) ~ track sharing ~ TRACK SIGN ~ track slab ~ track stagger ~ track stiffness ~ track structure ~ track substructure ~ track superelevation recorder ~ track support ~ track support zone ~ track tail ~ track tolerances ~ track tools ~ track trolley ~ Track Trolley Controller (TTC) ~ track twist ~ track type ~ track typical section ~ Track Visitor Permit (TVP) ~ Track Visitors Pass ~ Track Welder (TW) ~ track width ~ track worker ~ Track-Ex ~ track-to-train radio ~ track, evolution of ~ trackbed ~ trackbed investigation (TBI) ~ Trackernet ~ trackform ~ TrackLab ~ Trackman ~ Trackmaps ~ Trackmaster ~ trackside ~ trackside ERTMS equipment ~ trackside functional module (TFM) ~ Tracksys ~ Tracktools ~ trackway ~ Trackwork ~ trackwork ~ trackworker ~ traction ~ traction / brake controller ~ traction and rolling stock (TRS) ~ Traction and Rolling Stock Subject Committee (TRSSC) ~ traction bleed resistors traction bond ~ traction brake controller (TBC) ~ traction control cut-out switch (TCCOS) ~ traction current ~ traction current plunger ~ traction current rail ~ traction current return ~ traction current return rails ~ traction current section ~ traction digest advice ~ traction equipment ~ traction equipment case ~ traction gel ~ traction gel applicator (TGA) ~ traction inspector ~ traction interlock ~ traction knowledge ~ traction maintenance depot (TMD) ~ traction motor ~ traction power ~ Traction Power Centralised Management System (TPCMS) ~ traction power distribution ~ traction rail ~ traction return circuit ~ traction return current ~ traction return rail ~ traction supply ~ traction supply current ~ traction unit ~ traction-derived supply ~ tractive effort ~ tractor ~ Traffic ~ TRAFFIC ~ traffic ~ traffic circular ~ traffic exam ~ traffic hours ~ traffic management system (TMS) ~ traffic moment ~ traffic regulating rules ~ trail ~ TRAIL ~ trailable points ~ trailable switch ~ trailable turnout ~ trailed ~ trailed through ~ trailer ~ trailer coaching stock ~ trailing ~ trailing axle ~ trailing bogie ~ trailing crossing ~ trailing crossover ~ trailing end ~ trailing junction ~ trailing movement ~ trailing points ~ trailing switch ~ trailing weight ~ train ~ TRAIN ~ train accident ~ train accident risk train anchor ~ train approaching berth ~ train arrangements ~ train arrestor ~ train battery ~ train brake ~ Train Captain ~ train continuity ~ train continuity circuit ~ train control system (TCS) ~ train coupling compatibility matrix (TCCM) ~ train crew ~ train data ~ train data recorder (TDR) ~ train describer (TD) ~ train describer berth (berth, TD berth) ~ train describer stepping (TD stepping) ~ train description (TDN) ~ train detection ~ train detection system ~ train diagram ~ train disposal ~ train document ~ train door interlock ~ train entering section (TES) ~ train examination ~ train examiner ~ train formation ~ train guide ~ train ID ~ train in section (TIS) ~ Train Infrastructure Performance (TIP) ~ train integrity system ~ train length ~ train line (TL) ~ train lines ~ train locomotive ~ train man operated (TMO) ~ train management system (TMS) ~ Train Manager ~ Train Master ~ train maximum safe front end ~ train mile ~ train minimum safe front end ~ train minute delay ~ train minutes ~ train movement ~ Train number ~ train on line (TOL) ~ train one person operation equipment - in-cab ~ train one person operation equipment – platform ~ train operated points (TOP) ~ train operated route release (TORR) ~ train operated switch ~ train operated warning system (TOWS) ~ train operating company (TOC) ~ train operating unit (TOU) ~ Train Operator ~ train OPO equipment - in-cab ~ train OPO equipment – platform train path ~ train pedestrian value (TPV) ~ train performance ~ train performance model ~ train pipe ~ train plan ~ train planning ~ Train Planning Rules (TPR) ~ TRAIN PREP ~ train preparation ~ Train Preparer ~ Train Protection and Warning System (TPWS) ~ Train Protection and Warning System indicator (TPWS indicator) ~ Train Protection and Warning System loop (TPWS loop) ~ train radio computer (TRC) ~ train ready to start (TRTS) ~ train ready to start indicator (TRTS indicator) ~ train ready to start plunger (TRTS plunger) ~ train register ~ train register book ~ train reporting number ~ train ride monitoring unit (TMRU) ~ train running away alarm (TRA alarm) ~ train running controller (TRC) ~ train running times ~ train service controller (TSC) ~ Train Service Information (TSI) ~ Train Service Information Access system (TSIA) ~ Train service manager (TSM) ~ train service specification (TSS) ~ train shed ~ Train Signalling Block Regulations, the ~ Train Signalling Regulations, the ~ train slot ~ train speed supervision ~ train spotter ~ train staff ~ train stop ~ train stop override ~ train stop override push button ~ train stop sensor (TSS) ~ train-stop sensor system (TSS) ~ train wheel detector ~ train xxx ~ train-related speed restriction ~ traincrew ~ traincrew operated (TMO) ~ traincrew operated crossing (TMO) ~ traincrew operated barriers (TMO(B)) ~ trainload coal ~ Trainman ~ trains entering terminal stations (TETS) ~ trains per hour (TPH, tph) ~ trainstop ~ tram ~ tram phase ~ tram plates ~ tram ready to start ~ tram road ~ tram-train ~ TRAMM ~ tramway ~ tramway OLE ~ tramway overhead line equipment ~ Trans‑European Network (TEN) ~ Trans‑European Network Strategy (TENS) ~ Trans‑European Network Strategy Route (TENS Route) ~ Trans‑manche Link (TML) ~ transboardment bridge ~ Transfesa ~ transformer ~ transhipping ~ transhipping shed ~ transit ~ transit cleat ~ transition ~ transition adjustment switch ~ transition beam ~ transition curve (trans.) ~ transition heel ~ transition length (TL) ~ transition migration ~ transition panel ~ transition rail ~ transition section ~ transition shift (S) ~ transition slab ~ transition step ~ transitioned crossover ~ transitioned lead ~ transitioned turnout ~ translational failure ~ translator vehicle ~ transmission based signalling (TBS) ~ transmission based train control (TBTC) ~ transom ~ transponder ~ TransPennine Express ~ Transport Act 1947 ~ Transport Act 1962 ~ Transport and Works Act (TWA) ~ Transport for Greater Manchester (TfGM) ~ Transport for London (TfL) ~ Transport for the North (TfN) ~ Transport for Wales (TfW) ~ Transport for West Midlands (TfWM) ~ transport operator ~ Transport Scotland (TS) ~ Transport Undertaking ~ transportable token unit (TTU) ~ transposing ~ transposition bond ~ transposition joints ~ Transrail ~ transverse profile ~ trap points ~ trap road ~ trap-and-drag ~ trap-and-drag incident ~ trapping arrangements ~ trapping protection ~ traps ~ TRATIM ~ travel mode ~ travelling engine ~ travelling post office (TPO) ~ traverser ~ trax ~ traxcavate ~ Traxcavator ~ TRB ~ TRC ~ TrC ~ TRE ~ tread ~ tread brake ~ tread chamfer ~ tread corner ~ tread datum ~ treadle ~ TRED ~ tree ~ treenail ~ treenail and spike ~ treenail and spike fastening ~ trenching ~ trepanning ~ TREsa ~ TREsim ~ trespass ~ trespass and vandalism (TP&V) ~ TRESPASS ~ trespass guard ~ Trevithick, Francis ~ Trevithick, Richard ~ TRFB ~ TRFM ~ TRGM ~ tri-compo ~ tri-composite coach ~ tri-metallic weld ~ tri-metallic zone (TMZ) ~ tri-mode ~ tri-mode train ~ trial hole ~ triangle ~ tribometer ~ TRIBUTE ~ TRID ~ Trident ~ trigger ~ trigger loop ~ TRIM ~ Trimble ~ TRIME TRIMS ~ trip ~ trip cock ~ trip mode (TR) ~ trip timbers ~ trip wire ~ tripcock ~ triple bank ~ triple bank tamper ~ triple differential speed restriction ~ triple differential warning indicator ~ triple intersection ~ triple valve ~ triple voltage ~ triple Wacker ~ triple-S I ~ tripped ~ tripping ~ TRIS ~ TRK PATROL ~ TRM ~ TRMU ~ TRM beam ~ TROC ~ trolley ~ trolley jumper ~ trolley wire ~ troop train ~ TroTred ~ trough rail ~ trough route ~ troughing ~ troughing route ~ troughs ~ Trout (ZFO) ~ TRR ~ TRS ~ TRSB ~ TRSM ~ TRSMD ~ TRSSC ~ TRT ~ TRTS ~ TRTS FLR ~ TRTS indicator ~ TRTS plunger ~ TRU ~ TRUB ~ truck ~ TRUK ~ trunking ~ truss ~ TRUST ~ TRUST FLR ~ TRUST-DA ~ TRV ~ TRW ~ TS ~ TS&I ~ TS&S ~ TSA ~ TSB ~ TSBR ~ TSC ~ TSCB ~ TSD ~ TSDB ~ TSE ~ TSG ~ TSH ~ TSI ~ TSI SCHED ~ TSIA ~ TSL ~ TSLG ~ TSM ~ TSMS ~ TSO ~ TSOB ~ TSOT ~ TSPA ~ T-SPA ~ TSR ~ TSR Board ~ TSR O-ROTR ~ TSRB ~ TSRGD ~ TSS ~ TSSA ~ TSSC ~ TSSFG ~ TSSG ~ TSSU ~ TStG ~ TSW ~ TT ~ TT-x ~ TTC ~ TTCCTV ~ TTD ~ TTDB ~ TTE ~ TTI ~ TTIS ~ TTP ~ TTR ~ TTRA ~ TTS ~ TTW ~ TU ~ tube line ~ Tube Lines Limited ~ tube stock ~ tubeplate ~ TUCA ~ tug ~ TUm ~ tumbler frame ~ tumbler locking ~ tuned zone ~ Tunna, Norman, GC ~ tunnel ~ tunnel air lines ~ tunnel ballast ~ tunnel boring machine (TBM) ~ Tunnel Condition Marking Index (TCMI) ~ tunnel controls ~ tunnel emergency telephone (TET) ~ tunnel gauge ~ tunnel gong ~ tunnel headwall telephone ~ tunnel lights ~ tunnel lining ~ Tunnel Management Strategy ~ tunnel mouth ~ tunnel portal ~ tunnel rail ~ tunnel ring ~ tunnel ring axis ~ tunnel ring centre-line ~ tunnel section conductor rail ~ tunnel shaft ~ tunnel shield ~ tunnel signal ~ tunnel telephone ~ tunnel telephone system (TTS) ~ Tunny (ZCO, ZCV) ~ TUPE ~ Turbostar ~ Turbot (YCV, YCW) ~ turn back ~ turn back siding ~ turn in ~ turn out ~ turn rails ~ turn your back on passing trains ~ turning ~ turnout (TO, T/O) ~ turnout curve ~ turnout opening ~ turnout radius ~ turnout route ~ turnout speed ~ turnover locomotive ~ turnrail ~ turntable ~ turntable bolt ~ turret beacon ~ TV ~ TVC ~ TVIC ~ TVM ~ TVM signalling ~ TVM430 ~ TVP ~ TVR ~ TVSC ~ TW ~ TW ~ TWA ~ TWC ~ TWE ~ Tweedy ~ TWI ~ twin block sleeper ~ twin boom anchor portal ~ twin bore tunnel ~ twin contact ~ twin jib crane ~ twin relay ~ twin track ~ twin track cantilever (TTC) ~ twin tracking ~ twin wagons ~ TWINS ~ twist ~ twist fault ~ twist rail ~ Twistlock ~ Twistlock fastening ~ TWO ~ two aspect colour light signal ~ two aspect signalling ~ two chain plans ~ two foot ~ two level baseplate ~ two level chair ~ two levelled switch ~ two levelled switch and crossing layout ~ two pipe air brake ~ two track line ~ two track railway ~ two way lever ~ two-levelling ~ TWPTA ~ TWPTE ~ TWS ~ TX ~ Tx ~ TY ~ Tyer ~ Tyer, Edward ~ type approval ~ tyre ~ tyre turning ~ Tyrell ~ TZ

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U

U ~ U-frame action ~ U-type bridge ~ U/S ~ U14 ~ U15 ~ U3 ~ U5 ~ U69 ~ UAL ~ UAT ~ UB ~ UBS ~ UC ~ UCM ~ UD ~ UDS ~ UEEIV ~ UEL ~ UF ~ Uff-Cullen Inquiry ~ UFL ~ UFN ~ UFPX ~ UFTX ~ UGL ~ UGMS ~ UHMWPE ~ UIC ~ UIC 33 ~ UIC 54B ~ UIC 56 ~ UIC 60 ~ UIC 60B ~ UIC classification ~ UIC GA ~ UIC GA profile ~ UIC GB ~ UIC GB profile ~ UIC GB+ ~ UIC GB+ profile ~ UIC GB2 ~ UIC GB2 profile ~ UIC GC ~ UIC GC profile ~ UIC sprung bearer ~ UK ERTMS ~ UK master series (UKMS) ~ UK master series design range ~ UK Tram ~ UK Tram Limited ~ UK1 gauge ~ UK1 OCS ~ UK1 overhead contact system ~ UK2 gauge ~ UKMS ~ UKMS125 ~ UKRIA ~ UKRITT ~ UKRRIN ~ UKSTT ~ ULR ~ ultra light rail (ULR) ~ Ultrasonic inspection of rails ~ ultrasonic rail flaw detection (URFD) ~ ultrasonic rail flaw detector operator (URFDO) ~ Ultrasonic Test Unit (UTU) ~ ultrasonic testing ~ ultrasonic testing team ~ UM ~ UN ~ UN mode ~ un-insulated knuckle ~ un-insulated overlap ~ un-insulated overlap span ~ UN-INVEST ~ un-signalled line ~ un-sprung mass ~ unassisted Lookout ~ unassisted Lookout protection ~ UNATR CAN ~ unattended geometry measurement system (UGMS) ~ unattended train operation (UTO) ~ UNAUTH CON ~ UNAUTH SSO ~ unauthorised movement ~ unbraked ~ uncle ~ unclipping ~ unconditional emergency stop (UES) ~ unconditional emergency stop control ~ unconditional reset/restoration ~ uncontrolled evacuation ~ uncouple ~ uncoupling ~ under road crossing (URX) ~ under roller ~ under sleeper ~ under sleeper pad (USP) ~ under the hammer ~ under the hill ~ under the wires ~ under track crossing (UTX) ~ under traffic ~ under-sleeper pad (USP) ~ underbolt ~ underbridge (UB) ~ undercut switch ~ underframe ~ underframe wear plate ~ underground railway ~ underground station ~ Underground Ticketing System (UTS) ~ underline bridge (UB) ~ undershot curve ~ understressed rail ~ underwater examination ~ undetected ~ UNDM ~ undrilled (UD) ~ undulating railway ~ UNEX L/R ~ UNEX L/S ~ UNEX O/T ~ unfastened rail ~ unfastening ~ unfitted mode (UN) ~ unfitted tail ~ unfitted train ~ unfitted vehicle ~ unfitted ~ uni-directional line ~ UNIFE ~ uniform ~ Unimog ~ Union Internationale des Chemins de Fer (UIC) ~ UNISIG ~ unit ~ unit de-select (UDS) ~ unit loads ~ unit train ~ unit weight ~ United Railway Companies' Committee (URCC) ~ universal baseplate ~ universal tamper ~ unlined tunnel ~ Unlined Tunnel Condition Marking Index (UTCMI) ~ unpaid area ~ unprotected crossing ~ unprotected wrong side failure (UWSF) ~ unreadable ~ unsafe track condition ~ unset ~ unsolicited brake application ~ UNSTAFFED ~ unstaffed station ~ unstrengthened ~ unstrengthened switches ~ unstressed continuous welded rail ~ unstressed CWR ~ unworked ~ unworked catch points ~ unworked points ~ unworked switches ~ UoM ~ up (U) ~ up along ~ up and down ~ up direction ~ up fast (UF) ~ up line (UL) ~ up main (UM) ~ up on stilts ~ up on stools ~ up relief (UR) ~ up side ~ up slow (US) ~ uphill ~ UPL ~ uplift ~ uplift dropper ~ upper fillet ~ upper fishing surface ~ upper quadrant ~ upper quadrant signal (UQ) ~ upper vehicle sector ~ UPS ~ UPSU ~ UPWSF ~ URCC ~ Urchin (ZCA) ~ URFD ~ URFDO ~ urgent safety advice (USA) ~ URL ~ URLaSE ~ Urmston accident ~ URPS ~ URS ~ URX ~ US ~ US&S ~ USA usable length ~ USE ~ user worked ~ user worked crossing (UWC) ~ user worked crossing with miniature red / green warning lights (UWCMWL) ~ user worked gate crossing (UWG) ~ USI ~ USL ~ USP ~ USSR ~ UST ~ UT ~ UTCMI ~ UTE ~ UTGRA ~ UTO ~ UTS ~ UTU ~ UTU2 ~ UTV ~ UTX ~ UWC ~ UWCMWL ~ UWCt ~ UWG ~ UWR ~ UWSF ~ UWTF ~ UXO

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V

V ~ V-Laser ~ V-shaped crack ~ V-value ~ V/Comm SIC ~ V/S SIC ~ V/T SIC ~ V/TC SIC ~ V/TS SIC ~ V/V SIC ~ V&V ~ V8 ~ VA ~ VAB ~ vacuum brake (VB) ~ vacuum braked ~ vacuum brakes vacuum circuit breaker (VCB) ~ vacuum circuit breaker latching circuit ~ vacuum piped ~ VAE ~ validation ~ value engineering (VE) ~ Value for Money (VfM) ~ Value Improvement Programme (VIP) ~ value of preventing a fatality (VOPF, VPF) ~ valvegear ~ VAMPIRE ~ van ~ VANDALS ~ vane relay ~ VAPE screws ~ Vari-SPAD ~ variable load ~ variable load control valve ~ variable load valve (VLV) ~ VASP baseplate ~ VATS ~ VATT ~ VB ~ VBDP ~ VC ~ VCA ~ VCB ~ VCC ~ VCM ~ VCUKVD ~ VDL FIRE ~ VDMVDP ~ Ve ~ VE ~ Vecom ~ vee ~ vee rail ~ veg ~ VEG STD ~ vegetation management ~ Vehicle acceptance ~ vehicle acceptance body (VAB) ~ Vehicle Access to Stations Project (VATS) ~ vehicle approvals certification ~ Vehicle Control Computer (VCC) ~ vehicle gauges ~ vehicle inspection and brake test (VIBT) ~ vehicle overhang ~ vehicle recognition system (VRS) ~ vehicle type codes (CARKND) ~ vehicular scour ~ VEID ~ ventilation shaft ~ VeRA ~ verification ~ VERSE testing ~ versed sine ~ versine (v) ~ versine ratio ~ versine rise ~ vertical (V) ~ Vertical alignment ~ vertical baseplate ~ vertical circulation ~ vertical concrete sleeper ~ vertical curve (VC) ~ vertical curve offset ~ vertical design ~ vertical design S&C ~ vertical design S&C Layout ~ vertical design switch and crossing ~ vertical door stanchion ~ vertical longitudinal splitting (VLS) ~ vertical plain line ~ vertical rail ~ vertical ride ~ vertical S&C ~ vertical switch ~ vertical tappet lever frame ~ vertical throw ~ verticals ~ very poor ~ very short term plan (VSTP) ~ vestibule ~ VETLA ~ VF ~ VG ~ VH ~ VHLC ~ VHST ~ VI ~ viaduct ~ viaduct inspection unit (VIU) ~ VIBT ~ vicinity zone ~ VICOS ~ victor ~ VID ~ Video Train Positioning System (VTPS) ~ view ~ vigilance system (VS) ~ Vignoles rail ~ Vignoles, Charles Blacker ~ VIM ~ VIP ~ Virgin Trains (VT) ~ Virgin Trains East Coast (VTEC) ~ VIRR ~ virtual headwall ~ virtual joint ~ virtual jointed ~ virtual marker board ~ virtual quarry (VQ) ~ virtual tip ~ virtual transition ~ visibility ~ VISION ~ visual electronic information display (VEID) ~ visual examination ~ visual examination of structures ~ vital ~ Vital Rail ~ VIU ~ VL/VT ~ VLAN ~ VLCV ~ VLD ~ VLS ~ VLV ~ Vm ~ VM ~ VME ~ VME bus ~ VMFL ~ VMI ~ VMOI ~ VMS ~ VMT ~ VMx ~ VNCAB ~ VOBC ~ VOG ~ VOI ~ void meter ~ voided sleepers ~ voiding ~ voids ~ VoIP ~ voltage testing device ~ volts-free contacts ~ VOPF ~ Vortok Coil ~ Vossloh ~ Vossloh SN ~ voussoir ~ Voyager ~ VPF ~ VPI ~ VPM ~ VPN ~ VQ ~ VR ~ VRAC ~ VRDI ~ VRG ~ VRS ~ VS ~ VSCS ~ VSDAC ~ VSOE ~ VSRP ~ VSTP ~ VSTP DELAY ~ VT ~ VTAC ~ VTEC ~ VTFM ~ VTISM ~ VTPS ~ VTS ~ VTT ~ VTWC ~ VUC ~ vulnerable users ~ VUPM ~ VV&I ~ VVVF ~ VW ~ VWC ~ VX ~ VXC ~ VZ

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W

W ~ W gauges ~ W limit ~ W/B ~ W/S ~ W&B ~ W10 ~ W10w ~ W11 ~ W11 gauge ~ W12 ~ W14 ~ W14 Gauge ~ W18 ~ W18 gauge ~ W5 gauge ~ W6 ~ W6 gauge ~ W600 ~ W6A ~ W6A gauge ~ W6A exception ~ W6A exception gauge ~ W6A SPL ~ W6a wagon gauge ~ W7 ~ W7 gauge ~ W8 ~ W8 gauge ~ W9 ~ W9 gauge ~ W9 plus ~ W9 plus gauge ~ WA ~ WABCO ~ WABTEC ~ WAC ~ WACC ~ Wacker pack ~ Wacker plate ~ WAD ~ WAG ~ WAGE ~ wages grades ~ WAGeX ~ WAGN ~ WAGO ~ wagon ~ wagon names ~ wagon number ~ WAGONS ~ wagonway ~ waggonway ~ WAIF ~ WAIMU ~ waist ~ walk out report ~ walking ~ walking speed ~ walkout ~ WALNUT ~ Walrus (YGV) ~ Walschaert, Egide ~ Walschaert’s valve gear ~ Walton Junction accident ~ WAN ~ WAR ~ WARA ~ WARC ~ Ward coupler ~ WARE ~ WARM ~ warn on ~ warning arrangement ~ warning board ~ warning distance ~ warning indicator (WI) ~ warning route ~ warning signal ~ warning time ~ WARP ~ Warren truss ~ warships ~ washdrop ~ washing the hands, importance of ~ washout ~ washout and earthflow risk mapping (WERM) ~ washout failure ~ watchman ~ water catchment tray ~ water troughs ~ watering ~ waterproofing ~ Watford accident ~ WAV ~ WaveTrain LCWS ~ WaveTrain MTDS ~ WaveTrain Systems AS ~ way ~ waybeam ~ wayside ~ WB ~ WBS ~ WC ~ WC&ER ~ WCA ~ WCAS ~ WCE ~ WCML ~ WCPSU ~ WCRC ~ WCRM ~ WCRR ~ WCRTCC ~ WCTCC ~ WDM ~ WDM Protector ~ WDT ~ wear resisting rail ~ WEATHER ~ Weather Resilience and Climate Change Adaptation Plan (WRCCA Plan) ~ Weather Resilience and Climate Change Adaptation Strategy (WRCCA Strategy) ~ weave ~ web ~ web plate ~ Webb, Francis William ~ WED ~ wedge ~ Wedgelock ~ Wedgelock autocoupler ~ WEEB ~ weedkilling train ~ week numbers ~ Weekly Circular ~ Weekly Operating Notice (WON) ~ weep hole ~ weep pipe ~ WEF ~ Weil’s disease ~ WEL ~ weld (W) ~ weld collar ~ weld portion ~ weld repair ~ weld shear ~ weld upset ~ weld zone ~ welded angle (WA) ~ welded crossing ~ welded joint ~ welded rod (WR) ~ welded vee ~ welding gap ~ well wagon ~ Weltrol (YVP) ~ Welwyn control ~ WEN ~ WERM ~ WERM2 ~ WESER ~ Wessex Trains ~ West Anglia Great Northern (WAGN) ~ West Coast Main Line (WCML) ~ West Coast Route Modernisation (WCRM) ~ West Ealing accident ~ West Midlands Trains ~ West Yorkshire Combined Authority (WYCA) ~ westbound (WB) ~ WESTCAD ~ Westcode ~ Westcode brake ~ Western Region (WR) ~ Western Region barrier unit ~ Western Region box girder bridge ~ Western Route ~ WESTeX ~ Westinghouse ~ Westinghouse Rail Systems Ltd. (WRSL) ~ Westinghouse Stock ~ Westinghouse, George ~ WESTRACE ~ wet attrition value (WAV) ~ wet bed ~ Wet Bedders ~ wet machine room ~ wet spot ~ wet weld ~ WF ~ WG ~ WH ~ Whale (YBA, YHA) ~ WHD ~ Wheatstone, Charles FRS (Sir) ~ wheel / rail interface (WRI) ~ wheel backs ~ wheel burn ~ wheel flange ~ wheel flange lubricator ~ wheel flange thickness ~ wheel flat ~ wheel impact load detector (WILD) ~ wheel lathe ~ wheel profile ~ wheel shunt ~ wheel skate ~ wheel slide ~ wheel slide prevention ~ wheel slide protection (WSP) ~ wheel slip ~ wheel slip prevention (WSP) ~ wheel slow-up ~ wheel spin ~ wheel squeal ~ wheel timber ~ wheel transfer area ~ wheel tread ~ wheel tyre to wheel tyre resistance ~ wheel unloading ~ wheel-way ~ wheelbase ~ wheelburn ~ Wheelchex ~ WHEELS ~ wheels free (WF) ~ wheels free period ~ wheelset ~ wheelset back-to-back spacing ~ wheelset dimensions ~ wheelskate ~ wheelslide ~ wheelslide protection equipment ~ wheelslide protection system ~ wheelslip protection equipment ~ Whelk (YNO) ~ whisky ~ whistle board ~ Whitby, David ~ white circle ~ white diamond ~ white gates ~ white lights ~ white line ~ White Pages, the ~ white period ~ white route locking ~ white sleeve ~ whitewash ~ whitewash coach ~ whitewash run ~ Whiting (ZVV) ~ WHL ~ Whyte’s notation ~ WI ~ WIC ~ WICC ~ Wick Trimmers ~ wicket ~ wicket gate ~ wicket gate lever ~ wide angle crossing ~ wide gap weld ~ wide gauge ~ wide to gauge (WTG) ~ wide to gauge trap points ~ WIDEM ~ widespace ~ wideway ~ wig-wag ~ wig-wag lights ~ WILD ~ WILH ~ william ~ Williams ~ WILLOW ~ Wiltshire distant ~ Wiltshire, Philip ~ WiMAX ~ WIMU ~ wind ~ WIND ~ wind deviation ~ Wind-way ~ wing ~ wing front ~ wing rail ~ wing rail front ~ wing wall ~ winging ~ Winkle (ZVV) ~ Winter Development Train (WDT) ~ WIP ~ wire ~ wire adjuster ~ wire assister ~ wire count ~ wire deg. ~ wire degradation ~ wire gradient ~ wire height ~ wire run ~ wires ~ wiring diagrams ~ wiring train ~ witches hats ~ Witham accident ~ witness mark ~ WLAM ~ WLC ~ WLCC ~ WLL ~ WLRM ~ WM ~ WMAMMS ~ WMCU ~ WMP ~ WMPBG ~ WMPTA ~ WMPTE ~ WMRE ~ WMRP ~ WMSCC ~ WNC ~ WOF ~ WON ~ WONView ~ wood key ~ wood sleepers ~ Wood Spoilers ~ Woodentops ~ WORGAN ~ work ~ work arising identification form (WAIF) ~ work bank ~ work group ~ work package plan (WPP) ~ work site ~ worked ~ worked catch point ~ worked points ~ worked switches ~ workgroup ~ working ~ working air valve ~ working brake ~ working drive ~ working face ~ working lever (W) ~ Working Manual for Rail Staff ~ working pressure ~ working range ~ Working Reference Manual ~ working temperature limits ~ working timetable (WTT) ~ working, a ~ works inspection ~ Works Scheduler ~ Works Section ~ Works, the ~ works testing ~ Worksafe procedure ~ worksite ~ worksite book ~ worksite marker board ~ workstation ~ worn rails ~ WOSS ~ WPA ~ WPP ~ WR ~ WRATH ~ WRCCA ~ WRCCA plan ~ WRD ~ Wrexham & Shropshire (W&S) ~ WRI ~ wriggle diagram ~ WRISA ~ WRLtH ~ WRM ~ WROC ~ wrong ~ wrong direction ~ wrong direction controls ~ wrong direction movement (WDM) ~ wrong direction movement person in charge ~ wrong direction movement protector ~ wrong direction working ~ wrong kind of snow ~ wrong road ~ wrong road movement ~ wrong side failure (WSF) ~ wrong stick ~ wrought iron (WI) ~ WRSL ~ WRSSTD ~ WSA ~ WSC ~ WSF ~ WSL ~ WSMR ~ WSO ~ WSOSI ~ WSP ~ WSP | PB ~ WSP Global ~ WSPER ~ WST ~ WSTCF ~ WTD ~ WTF ~ WTG ~ WTG STAFF ~ WTOPS ~ WTP ~ WTS ~ WTT ~ WTT SCHED ~ WW ~ WWL ~ Wxxx ~ WYCA ~ WYG ~ WYITA ~ WYPTA ~ WYPTE

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XYZ

X ~ X drain ~ X level ~ X signal ~ X-factor ~ x-foot ~ X-ray ~ X1 ~ X2 ~ X3 ~ X4 ~ X8 ~ X9 ~ XA ~ XB ~ XC ~ XD ~ XF ~ XGE ~ XGI ~ XH ~ XI ~ Xing ~ XING INCDT ~ XiTrack ~ XK ~ XL ~ XLPE ~ XLT ~ XM ~ Xmas ~ XN ~ XO ~ Xover ~ XP ~ XQ ~ XR ~ XT ~ XTNL CONN ~ XTP ~ XU ~ XV ~ XW ~ XYZIRGB ~ XZ ~ Y ~ Y drain ~ Y network ~ Y turnout ~ Y/Q ~ Y&S ~ Y25 series bogie ~ YA ~ YAA ~ yankee ~ YAO ~ yard ~ yaw ~ yaw damper ~ yaw stiffness ~ YB ~ YB2 ~ YBA ~ YBB ~ YBO ~ YBP ~ YBQ ~ YC ~ YCA ~ YCO ~ YCV ~ YCW ~ YD ~ YD&S ~ YDA ~ YE ~ YEA ~ yellow ~ yellow aspect ~ yellow bond ~ yellow book ~ yellow cavalry ~ yellow diamond ~ yellow peril ~ yellow shunt signal ~ yellow triangle ~ yellow vest ~ YFA ~ YFB ~ YFO ~ YG ~ YGA ~ YGB ~ YGH ~ YGV ~ YHA ~ YI ~ Ying ~ YJ ~ YJA ~ YK ~ YKA ~ YL ~ YLA ~ YLO ~ YLP ~ YM ~ YMA ~ YMB ~ YMO ~ YMP ~ YN ~ YNO ~ YNP ~ YO ~ yobbex ~ Yodalarm ~ YOM ~ YP ~ YPA ~ YQ ~ YQA ~ YR ~ YRA ~ YSA ~ YT ~ YVP ~ YVQ ~ YWA ~ YX ~ Z ~ Z-type bridge ~ Z000 ~ ZAA ~ Zander (ZKV) ~ ZAV ~ ZBA ~ ZBO ~ ZBP ~ ZBQ ~ ZBV ~ ZBW ~ ZC ~ ZCA ~ ZCO ~ ZCV ~ ZCX ~ ZDA ~ ZDV ~ ZEA ~ ZEB ~ zebra ~ zed dropper ~ ZEPE ~ zero plate ~ ZEV ~ ZEX ~ ZFA ~ ZFH ~ ZFO ~ ZFV ~ ZFW ~ ZGA ~ ZHD ~ ZHLS ~ ZHV ~ zigzag welding ~ zigzagging ~ ZIM ~ ZJV ~ ZKL 3000 RC ~ ZKV ~ ZLR ~ ZLV ~ ZMV ~ Zöllner ~ zone ~ zone controller (ZC) ~ Zone Hazard Directory (ZHD) ~ zone of influence ~ ZPW ~ ZSE ~ ZTE ~ Zu l-60 ~ Zu UIC54B ~ ZUA ~ ZUB ~ zulu ~ ZUP ~ ZUV ~ ZUW ~ ZVEI ~ ZVV ~ ZW ~ ZX ~ ZXQ ~ ZY ~ ZZ ~ ΔQ/Q ~ ΔQ/Q test

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