ERA Railway Terminology visual v0 featured

ERA Railway Terminology Collection

Last updated: 12 March 2026

The ERA Railway Terminology Collection gathers terms and abbreviations that are contained in the EU legal framework for railway, technical documents produced by bodies which are engaged in the development of important evolution in the railway system and other relevant glossaries.

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Disclaimer
ERA Railway Terminology Collection is a consultation tool, developed to support the sharing of information through the actors involved in running the Single European Railway Area (SERA). The responsibility for the correctness, completeness, accuracy, or reliability of the information in ERA RTC lays upon the authors of the definitions, as they derive from reference documents having their own preparation and approval flow. Users cannot call ERA liable for the use they make of the content. Please consider that when the collection is exported (.csv) and then printed or converted, it becomes uncontrolled.
Term	Context	Document Type	Origin document
W	ERTMS	Technical Document	ERTMS/ETCS - Glossary of Terms and Abbreviations - version : 4.0.0 - date 05/07/2023
W/(m2.°C)	EU Policy	Glossary	Glossary for transport statistics - 6TH EDITION 2026
WAG	Interoperability	Application Guide	Application_guide GUI/TSI/2023 Version 1.0 20/12/2023Guide for the application of the Technical Specifications for Interoperability (TSIs)
Wagon	International Relations	Convention	Convention concerning International Carriage by Rail (COTIF) Appendix C – Regulations concerning the International Carriage of Dangerous Goods by Rail (RID)
Wagon	Freight	Directive	Directive 2008/68/EC of the European Parliament and of the Council of 24 September 2008 on the inland transport of dangerous goods
Wagon	International Relations	COTIF Document	Uniform Rules concerning the Validation of Technical Standards and the Adoption of Uniform Technical Prescriptions applicable to Railway Material intended to be used in International Traffic (APTU - Appendix F to the Convention) applicable from 01.03.2019 (corrected 31.07.2019)
Wagon	International Standard	ISO	ISO/DIS 22575(en) Railway applications — General terms and definitions
Wagon	EU Policy	Glossary	Glossary for transport statistics - 6TH EDITION 2026	Latest release
Wagon (WAG) TSI	Operation	TSI	Commission Implementing Regulation (EU) 2019/773 of 16 May 2019 on the technical specification for interoperability relating to the operation and traffic management subsystem of the rail system within the European Union and repealing Decision 2012/757/EU
Wagon carrying capacity	EU Policy	Glossary	Glossary for transport statistics - 6TH EDITION 2026	Latest release
Wagon Compatibility Code (WCC)	Freight	ERA Technical Document	Codification of lines and wagons for combined transport and associated operational procedures Technical document : ERA/TD/2023-01/CCT - Version : 1.1 on 21 March 2023
Wagon Correction Digit (WCD)	Freight	ERA Technical Document	Codification of lines and wagons for combined transport and associated operational procedures Technical document : ERA/TD/2023-01/CCT - Version : 1.1 on 21 March 2023
Wagon Correction Digit (WCD)	Freight	TSI	Commission Regulation (EU) No 321/2013 of 13 March 2013 concerning the technical specification for interoperability relating to the subsystem ‘rolling stock — freight wagons’ of the rail system in the European Union and repealing Decision 2006/861/EC
Wagon for intermodal transport	EU Policy	Glossary	Glossary for transport statistics - 6TH EDITION 2026	Latest release
Wagon in running order (operating term)	Freight	Agreement	General Contract of Use for wagons (CGU)
Wagon keeper	Freight	Agreement	General Contract of Use for wagons (CGU)
Wagon load	RNE Glossary	Glossary	RNE Glossary - NS_CID_Glossary_2025
Wagon load	Withdrawn	TSI	Commission Regulation (EU) No 1305/2014 of 11 December 2014 on the technical specification for interoperability relating to the telematics applications for freight subsystem of the rail system in the European Union and repealing the Regulation (EC) No 62/2006	Latest release
Wagon Note	Freight	Agreement	General Contract of Use for wagons (CGU)
Wagon Tare	Freight	Agreement	General Contract of Use for wagons (CGU)

Common Safety Method
Conformity Assessment
Control-Command and Signalling
Data Protection
Energy
Entity in Charge of Maintenance
ERTMS
EU Policy
Freight
Infrastructure
International Relations
International Standard
Interoperability
Noise
Operation
Persons with Reduced Mobility
Railway Tunnels
Registers
Regulation
RNE Glossary
Safety / SSC-SA
Security
SERA_EU Transport
Single Market Mutual Recognition Conformity Assessment
SMS Safety Culture Human and Organisational Factor
Telematics Applications for Passenger and Freight Services
Vehicles / VA
Withdrawn

Agreement
Application Guide
Certification Scheme
CIT Document
Convention
COTIF Document
Council Recommendation
Decision
Directive
ERA Technical Document
EU Technical Document
Glossary
Guide
International Agreement
ISO
Manual
Recommendation
Regulation
Sectorial Scheme
Technical Document
TSI
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