| AB | Allocation Body |
| AG | Advisory Group |
| APIS | Authorisation for Placing Into Service |
| ATO | Automatic Train Operation |
| CCS | Control, Command and Signalling |
| CEF | Connecting Europe Facility |
| CER | Community of European Railway and Infrastructure Companies |
| CID | Corridor Information Document |
| CINEA | European Climate, Infrastructure and Environment Executive Agency |
| CIP | Customer Information Platform |
| CIS | Charging Information System |
| CNC | Core Network Corridor |
| C-OSS | Corridor One-Stop-Shop |
| DG MOVE | EC's Directorate-General for Mobility and Transport |
| DMI | Driver Machine Interface |
| DTT | Draft Time Table |
| EC | European Commission |
| ECCO | Efficient Cross Corridor Organisation |
| ECMT | European Capacity Management Tool |
| EEIG | European Economic Interest Grouping |
| ENIM | European Network of Infrastructure Managers |
| ERA | European Union Agency for Railways |
| ERTMS | European Rail Traffic Management System |
| ETA | Estimated Time of Arrival |
| ETC | European Transport Corridor |
| ETCS | European Train Control System |
| ETH | Estimated Time of Handover |
| ETI | Estimated Time of Interchange |
| ETMN | European Train Management Network |
| EU | European Union |
| ExBo | Executive Board |
| FA | Framework Agreement |
| FCA | Framework for Capacity Allocation |
| FRMCS | Future Railway Mobile Communication System |
| FTE | Forum Train Europe |
| FTT | Final Time Table |
| GTC | General Terms and Conditions |
| GSM-R | Global System for Mobile Communications for Railway |
| HSR | High-Speed Rail Network |
| HST | High-Speed Train |
| ICM | International Contingency Management |
| IM/IMs | Infrastructure Management/Infrastructure Managers |
| IMT | Incident Management Tool |
| IP | Implementation Plan |
| KPI | Key Performance Indicator |
| LoI | Letter of Intent |
| MB | Management Board |
| MD | Managing Director |
| MDMS | Multimodal Digital Mobility Services |
| MoT | Ministry of Transport |
| NCI | Network and Corridor Information System |
| NEB | National Enforcement Bodies |
| NETA | Network ETA |
| NetPaP | Network PaP |
| NExBo | Network of Executive Boards |
| NNTR | Notified National Technical Rule |
| NPIM | National Project Implementation Manager |
| NS | Network Statement |
| NSA | National Safety Authority |
| NTR | National Technical Rules |
| NUTS | Nomenclature of Territorial Units for Statistics |
| OBU | On-Board Unit |
| OSS | One-Stop Shop |
| PaP | Pre-arranged Paths |
| PCS | Path Coordination System |
| PIM | Programme Implementation Manager |
| PMO | Programme Management Office |
| PRIME | Platform of Rail Infrastructure Managers in Europe |
| QCO | Quality Circle Operation |
| RA | Running Advice |
| RAG | Railway undertaking Advisory Group |
| RB | Regulatory Body |
| RBC | Radio Block Centre |
| RC | Reserve Capacity |
| R-CDM | Railway Collaborative Decision Making |
| RDD | Reference Document Database |
| RFC | Rail Freight Corridor |
| RFP | Rail Facilities Portal |
| RINF | Register of Infrastructure |
| RIS | Railway Infrastructure System |
| RoLa | Rolling Highway |
| RNE | RailNet Europe |
| RU | Railway Undertaking |
| SC | Safety Certificate |
| SERAC | Single European Railway Area Committee |
| SERAF | Single European Railway Area Forum |
| SMS | Safety Management System |
| STA | Scheduled Time of Arrival |
| STD | Scheduled Time of Departure |
| TAC | Track Access Charge |
| TAG | Terminal Advisory Group |
| TAF TSI | Telematics Applications for Freight Services |
| TAP TSI | Telematics Applications for Passenger Services |
| TCM | Train Composition Message |
| TCR | Temporary Capacity Restrictions (TCR) Tool |
| TEN-T | Trans-European Network - Transport |
| TFI | Task Force Interoperability |
| TIS | Train Information System |
| TMS | Transport Market Study |
| TPM | Train Performance Management |
| TSI | Technical Specifications for Interoperability |
| TT | Timetable |
| TTR | Timetabling and Capacity Redesign |
| UIRR | International Union for Road-Rail Combined Transport |
| USS | User Satisfaction Survey |
| WG | Working Group |
