ERA Railway Terminology Collection

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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Starting with "O" (184)

Disclaimer
The European Union Agency for Railways’ Railway Terminology Collection is a collection of existing terms aiming at supporting the sharing of information and harmonisation of terms in t he Single European Railway Area (SERA). It was created to facilitate the work of the Union institutions, representative bodies and national authorities. The terms and definitions contained within is meant purely as a documentation tool and have no legal effect. Where available, the Agency strives to provide a link to official texts with legal effect. The European Union Agency for Railways does not assume any liability for RTC’s contents. Only documents published in official sources (such as in the EU Official Journal or in sources of standardisation bodies) must be referenced to ensure conformity to the rules therein. The European Union Agency for Railways is not obliged to keep the RTC updated and cannot guarantee that the terms in the RTC are up to date. The terms and definitions in the RTC are drawn from different sources and may be subject to copyright and intellectual property rights of their respective authors and other third parties. Most documents owned by the European Union are freely available, many of them under Creative Commons licenses, and can be downloaded and reproduced provided the source is acknowledged, however, please check their respective copyright notices. Please, also see Commission Decision of 12 December 2011 on the reuse of Commission documents. EUR-Lex metadata is dedicated to the public domain in accordance with the Creative Commons CC0 1.0 Universal Public Domain Dedication deed.
Term	Context	Document Type	Origin document
OAPEC	EU Policy	EU Technical Document	Technical document from the Publications Office of the European Union - ‘Style guide’ Coordination Interinstitutional Style Guide - Annex 4
OAS	EU Policy	EU Technical Document	Technical document from the Publications Office of the European Union - ‘Style guide’ Coordination Interinstitutional Style Guide - Annex 4
OAU	EU Policy	EU Technical Document	Technical document from the Publications Office of the European Union - ‘Style guide’ Coordination Interinstitutional Style Guide - Annex 4
OB	Withdrawn	Guide	GUI/CCS TSI/2020 - version 7.3 on 09/01/2023 Guide for the application of the CCS TSI In accordance with Article 19(3) of Regulation (EU) 2016/796 of the European Parliament and of the Council of 11 May 2016
OBB	ERTMS	Glossary	ERTMS Glossary
OBD	Withdrawn	Glossary	Transport Research and Innovation Monitoring and Information System Glossary
OBE	Withdrawn	Glossary	Transport Research and Innovation Monitoring and Information System Glossary
Objective	Common Safety Method	Guide	Safety management system requirements for safety certification or safety authorisation. Version 1.3 Manuscript completed in April 2021
Objectivity	EU Policy	Regulation	Regulation (EC) No 223/2009 of the European Parliament and of the Council of 11 March 2009 on European statistics and repealing Regulation (EC, Euratom) No 1101/2008 of the European Parliament and of the Council on the transmission of data subject to statistical confidentiality to the Statistical Office of the European Communities, Council Regulation (EC) No 322/97 on Community Statistics, and Council Decision 89/382/EEC, Euratom establishing a Committee on the Statistical Programmes of the European Communities
Observation	RNE Glossary	Glossary	RNE Glossary - NS_CID_Glossary_2023
Obstacle-free route	Persons with Reduced Mobility	TSI	Commission Regulation (EU) No 1300/2014 of 18 November 2014 on the technical specifications for interoperability relating to accessibility of the Union's rail system for persons with disabilities and persons_with_reduced_mobility.
OBT	Withdrawn	Glossary	Transport Research and Innovation Monitoring and Information System Glossary
OBU	Withdrawn	Guide	GUI/CCS TSI/2020 - version 7.3 on 09/01/2023 Guide for the application of the CCS TSI In accordance with Article 19(3) of Regulation (EU) 2016/796 of the European Parliament and of the Council of 11 May 2016
OBU	ERTMS	Glossary	ERTMS Glossary
OBU	ERTMS	Technical Document	ERTMS/ETCS - Glossary of Terms and Abbreviations - version : 4.0.0 - date 05/07/2023
OCAS	EU Policy	EU Technical Document	Technical document from the Publications Office of the European Union - ‘Style guide’ Coordination Interinstitutional Style Guide - Annex 4
OCC	Freight	Glossary	Transport of dangerous goods. Risks Management Framework. Framework glossary v. 1.0/2018
OCC	ERTMS	Glossary	ERTMS/ATO Glossary - version 2 on 05.07.2023
Occupied	ERTMS	Technical Document	ERTMS/ETCS - Glossary of Terms and Abbreviations - version : 4.0.0 - date 05/07/2023
Occurrence	Freight	Glossary	Transport of dangerous goods. Risks Management Framework. Framework glossary v. 1.0/2018

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

Agreement
Application Guide
Certification Scheme
CIT Document
Convention
COTIF Document
Council Recommendation
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ERA Technical Document
EU Technical Document
Glossary
Guide
International Agreement
ISO
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