ERA Railway Terminology visual v0 featured

ERA Railway Terminology Collection

Last updated: 5 December 2025.

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
ATO Inhibition Zone	ERTMS	Glossary	ERTMS/ATO Glossary - version 2 on 05.07.2023
ATO On-board	ERTMS	Glossary	ERTMS/ATO Glossary - version 2 on 05.07.2023
ATO Operated Train	ERTMS	Glossary	ERTMS/ATO Glossary - version 2 on 05.07.2023
ATO Operational Speed Profile	ERTMS	Glossary	ERTMS/ATO Glossary - version 2 on 05.07.2023
ATO System version	Infrastructure	Regulation	Commission Implementing Regulation (EU) 2019/777 of 16 May 2019 on the common specifications for the register of railway infrastructure and repealing Implementing Decision 2014/880/EU
ATO Trackside	ERTMS	Glossary	ERTMS/ATO Glossary - version 2 on 05.07.2023
ATO-OB	ERTMS	Glossary	ERTMS/ATO Glossary - version 2 on 05.07.2023
ATO-TS	ERTMS	Glossary	ERTMS/ATO Glossary - version 2 on 05.07.2023
ATP	ERTMS	Glossary	ERTMS Glossary
ATP	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
ATP	ERTMS	Technical Document	ERTMS/ETCS - Glossary of Terms and Abbreviations - version : 4.0.0 - date 05/07/2023
ATP	Safety / SSC-SA	Application Guide	Implementation Guidance for CSIs - v. 6.0 on 24.05.2023	Latest release
ATS	ERTMS	Glossary	ERTMS/ATO Glossary - version 2 on 05.07.2023
ATSM	ERTMS	Glossary	ERTMS/ATO Glossary - version 2 on 05.07.2023
Attempted suicide	Safety / SSC-SA	Directive	Directive (EU) 2016/798 of the European Parliament and of the Council of 11 May 2016 on railway safety (recast)
Attempted suicide	EU Policy	Glossary	Glossary for transport statistics - 5TH EDITION 2019
Attributing reservation system	Telematics Applications for Passenger	Application Guide	TAP TSI Annex B.52 Reservation application_guide - version 1.0 of 06/12/2013
Attributing system	Telematics Applications for Passenger	Application Guide	TAP TSI Annex B.50 Timetable application_guide - version 1.0 of 06/12/2013
Attributing system	Telematics Applications for Passenger	Application Guide	TAP TSI Annex B.51 Tariff application_guide - version 1.0 of 06/12/2013
Attributing system	Telematics Applications for Passenger	TSI	Commission Regulation (EU) No 454/2011 of 5 May 2011 on the technical specification for interoperability relating to the subsystem ‘telematics applications for passenger services’ of the trans-European rail system

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