| AHB |
Automatic Half Barrier - type of level crossing |
| AOCL |
Automatic Open (level) Crossing Locally monitored |
| ATOC |
Association of Train Operating Companies |
| CET |
Controlled-Emission Toilet |
| CP3, CP4 |
Control Period 3, 4 |
| CTC |
Centralised Traffic Control |
| DDA |
Disability Discrimination Act |
| DfT |
Department for Transport |
| EARL |
Edinburgh Airport Rail Link |
| ERTMS |
European Rail Traffic Management System |
| FNL |
Far North Line |
| FoFNL |
Friends of the Far North Line |
| FSR |
First ScotRail |
| GARL |
Glasgow Airport Rail Link |
| GPS |
Global Positioning System |
| HITRANS |
Highlands and Islands Transport Partnership (our local RTP) |
| HLOS |
High Level Output Specification |
| HML |
Highland Main Line (Perth-Inverness) |
| HMRI |
Her Majesty's Railway Inspectorate - transferred from H&SE to ORR |
| HRP |
Highland Rail Partnership |
| H&SE |
Health & Safety Executive |
| HST |
High Speed Train |
| KPI |
Key Performance Indicator |
| NR |
Network Rail |
| ORR |
Office of Rail Regulation |
| PF |
Passenger Focus (the replacement for RPC) |
| R4G or RfG |
Room for Growth (Scott Wilson Report) |
| RETB |
Radio Electronic Token Block (signalling method used on FNL) |
| RIAC |
Rail Industry Advisory Committee |
| ROSCO |
Rolling Stock Owning Company |
| RPC |
Rail Passengers Council (or Committee) |
| RPCS |
Rail Passengers Committee for Scotland |
| RSSB |
Rail Safety and Standards Board |
| RTP |
Regional Transport Partnership |
| RTS |
Regional Transport Strategy |
| RUG |
Rail User Group |
| RUS |
Route Utilisation Study |
| RVAR |
Rail Vehicle Accessibility Regulations |
| SDO |
Selected Door Operation |
| SoFA |
Statement of Funds Available |
| SQUIRE |
Service Quality Incentive Regime |
| SRA |
Strategic Rail Authority |
| TEN |
Trans-European Network System |
| TLA |
Three letter acronym |
| TOC |
Train Operating Company |
| TPWS |
Train Protection and Warning System |
| TS |
Transport Scotland |
| WHL |
West Highland Line |