Bradshaw:Glossary

For three-letter station codes see CRS codes.

Not everyone knows all the hundreds of rail-specific acronyms and initialisms, so if any pop up in conversation on the Discord server, add them and their meaning below so others can look them up.

Please keep these in alphabetical order so it is easy to find a specific term.

4LM: Four Lines Modernisation programme
ACOA: Adverse Change Of Aspect
ARL: Arriva Rail London
ARS: Automatic Route Setting
ASC: Area Signalling Centre
ATC: Automatic Train Control
ATO: Automatic Train Operation
ATOC: Association of Train Operating Companies
ATP: Automatic Train Protection
ATW: Arriva Trains Wales
AWC: Avanti West Coast
AWS: Automatic Warning System
BML: Bright Main Line
BR: British Rail
BTP: British Transport Police
C+H: Circle and Hammersmith & City Lines
CAPE: Cancelled At Point of Entry
CBTC: Communications Based Train Control
CIS: Customer Information System
CoT: Close of Traffic
CR: Chiltern Railways
CS: Caledonian Sleeper
CSA: Customer Service Assistant
CSDE: Correct Side Door Enable
CSL2: Customer Service Level 2
CSR: Cab Secure Radio
DCO: Driver Controlled Operation
DCV: Door Closed Visual
DDA: Disability Discrimination Act
DLR: Docklands Light Railway
DOO: Driver Only Operation
DRA: Driver Reminder Appliance
DTG-R: Distance to Go Radio
DVA: Digital Voice Announcer
E*: Eurostar
ECML: East Coast Main Line
EMR: East Midlands Railway
EMT: East Midnland Trains
ERTMS: European Rail Traffic Managment System
ERU: Emergency Response Unit
ESDC: Emergency Saloon Door Control
ESR: Emergency Speed Restriction
ETCS: European Train Control System
FGW: First Great Western
FOC: Freight Operating Company
GA: Greater Anglia
GC: Great Central
GN: Great Northern
GoA (0-4): Grade of Automation
GSM-R: Global System for Mobile Communications – Railway
GTR: Govia Thameslink Railway
GWML: Great Western Main Line
GWR: Great Western Railway
GX: Gatwick Express
HEX: Heathrow Express
HML: Highland Main Line
HS1: High Speed 1
HS2: High Speed 2
HST: High Speed Train
HT: Hull Trains
IC: Intercity
IECC: Intergrated Electronic Control Centre
IEP: Interciy Express Program
IET: Intercity Express Train
IMR: Interlocking Machine Room
IoW: Isle of Wight
JLE: Jubilee Line Extension

KYT: Know Your Train LNER: London North Eastern Railway LNR: London Northwestern Railway LO: London Overground LOM: Limit of Movement LOROL: London Overground Rail Opration Ltd. LOS: Limit of Shunt LPTB: London Passenger Transport Board LRT: London Regional Transport LSL: Locomtive Services Limited LT: London Transport LTM: London Transport Museum LTP: Long Term Plan LUL: London Underground Limited MDR: Metropolitain District Railway MENTOR: Mobile Electric Network Testing Observation and Recording MML: Midland Main Line MOM: Mobile Operations Manager MR: Metropolitan Railway MTR: Mass Transit Railway (Hong Kong Subway) NLE: Northern Line Extension NMT: New Messurement Train NR: Network Rail NR: Northern Rail NRM: National Railway Museum NRN: National Radio Network NSE: Network South East OA: Open Access OCS: Overhead Contact System OLE: Overhead Line Equipment OOL: On Our Lines (This project) OPO: One Person Operation PEA: Passenger Emergency Alarm PED: Platform Edge Doors PEP: Prototype Electro Pneumatic Train PIS: Passenger Information System PLPR (1-4): Plain Line Pattern Recognition PRM: Persons with Reduced Mobility PSA: Passenger Service Agent PSB: Power Signal Box PSD: Platform Screen Doors PSR: Permanent Speed Restriction PTI: Platform Train Interface PTS: Personal Track Safety RAT: Rail Adhesion Train RDG: Rail Delivery Group REC: Railway Emergency Call RGI: Rail Gap Indicator RHTT: Rail Head Treatment Train ROC (Network Rail): Rail Operating Centre ROC (SimSig:Sessions): Railway Operating Centre RSF: Right Side Failure RTT: Real Time Trains RVAR: Rail Vehicle Accessibility Regulation SATS: Staff Assisted Train Services SCAT: Speed Control After Tripping SCC: Service Control Centre SCL1: Service Controller Level 1 SCL2: Service Controller Level 2 ScR: ScotRail SE: Southeastern SMA (0.5-14): Signal Migration Area SN: Southern Rail SoT: Start of Traffic SotD: Signal of the Day SPAD: Signal Passed At Danger SPAR: Signal Passed At Red SPAS: Signal Passed At Stop SPT: Signal Post Telephone SR: ScotRail SSR: Sub-Surface Railway STN: Special Train Notice STP: Short Term Plan SWML: South West Main Line SWR: South Western Railway SWT: South West Trains T/Op: Train Operator TBC: Traction Brake Controller TBTC: Transmission Based Train Control TC: Track Circuit TCF: Track Circuit Failure TCP: Trip Cock Protection TD (London Underground): Train Description TD: Train Describer TfGM: Transport for Greater Manchester TfL: Transport for London TfW: Transport for Wales TL: Thameslink TMS: Train Management System TOC: Train Operating Company TOPS: Total Operations Processing System TPE: TransPennine Express TPS: Train Planniong System TPWS: Train Protection and Warning System TRC: Track Recording Car TRT: Track Recording Train TRTS: Train Ready To Start TRU: Track Recording Unit TRV: Track Recording Vehicle TS: Tube Stock TSC: Transport Strategy Centre TSF: Track Section Failure TSI: Technical Specifications for Interoperability TSR: Temporary Speed Restriction TSW: Train Sim World TTN: Timetable Notice TYT: Track Your Train UERL: Underground Electric Railway Company of London UTO: Unattended Train Operation VAR: Varied Timetable VETC: Virgin Trains East Coast VOBC: Vehichle OnBoard Computer VSTP: Very Short Term Plan VT: Virgin Trains WAML: West Anglia Main Line WCML: West Coast Main Line WCRC: West Coast Railway Company WDM: Wrong Direction Move WMR: West Midlands Railway WMT: West Midland Trains WSF: Wrong Side Failure WSL: Wrong Signal Lowered WTT: Working Timetable XC: Cross Country XR: Crossrail