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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Starting with "N" (282)

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
NCB	International Standard	EU Technical Document	CEN CENELEC ABBRAVIATION ACRONYM 2025	Latest release
NCCI	Infrastructure	Application Guide	Guide for the application of the INF TSI GUI/INF TSI/2023 - Version 4.0 of 20/12/2023
NCI	EU Policy	EU Technical Document	Technical document from the Publications Office of the European Union - ‘Style guide’ Coordination Interinstitutional Style Guide - version on 19.04.2022
NCI	RNE Glossary	Glossary	RNE Glossary - NS_CID_Glossary_2025	Latest release
NDP	Infrastructure	Application Guide	Guide for the application of the INF TSI GUI/INF TSI/2023 - Version 4.0 of 20/12/2023
NDT	Entity in Charge of Maintenance	Certification Scheme	Certification scheme for ECM and outsourced maintenance functions under Regulation (EU) 2019/779
NDT	Entity in Charge of Maintenance	Application Guide	Guidance on ECM Certification process Guide for the application of Article 14 of Directive (EU) 2016/798 and Commission Implementing Regulation (EU) No 2019/779 on a system of certification of entities in charge of maintenance for vehicles. Version 9.0 on 01/03/2021
NDT	Entity in Charge of Maintenance	Sectorial Scheme	Sectorial Scheme for accreditation and recognition of ECM certification bodies under Regulation (EU) 2019/779. ERA 1172/002 V3.1 on 15/06/2020
NE	International Standard	ISO	ISO 3166 (en) - Online Browsing Platform (OBP) Codes for the representation of names of countries and their subdivisions — Part 1: Country code
NEA	EU Policy	EU Technical Document	Technical document from the Publications Office of the European Union - ‘Style guide’ Coordination Interinstitutional Style Guide - version on 19.04.2022
NEAFC	EU Policy	EU Technical Document	Technical document from the Publications Office of the European Union - ‘Style guide’ Coordination Interinstitutional Style Guide - version on 19.04.2022
Near miss	Security	Directive	Directive (EU) 2022/2555 of the European Parliament and of the Council of 14 December 2022 on measures for a high common level of cybersecurity across the Union, amending Regulation (EU) No 910/2014 and Directive (EU) 2018/1972, and repealing Directive (EU) 2016/1148 (NIS 2 Directive)
NEB	RNE Glossary	Glossary	RNE Glossary - NS_CID_Glossary_2025	Latest release
NEB (National Enforcement Body)	Telematics Applications for Passenger	Application Guide	TAP TSI Annex B.50 Timetable application_guide - version 1.0 of 06/12/2013
NEB (National Enforcement Body)	Telematics Applications for Passenger	Application Guide	TAP TSI Annex B.51 Tariff application_guide - version 1.0 of 06/12/2013
NEC	International Standard	EU Technical Document	CEN CENELEC ABBRAVIATION ACRONYM 2025	Latest release
Necessary and sufficient causes (NSC) - left side	Freight	Glossary	Handbook of scenarios for assessing major chemical accident risks JRC106029 - Ed. 2017
Negation	International Standard	ISO	ISO 7001:2023(en) Graphical symbols — Registered public information symbols
Neighbour	International Standard	ISO	ISO/IEC 10026-1:1998(en) Information technology — Open Systems Interconnection — Distributed Transaction Processing — Part 1: OSI TP Model	Latest release
Neighbouring country	Infrastructure	Regulation	Regulation (EU) 2024/1679 of the European Parliament and of the Council of 13 June 2024 on Union guidelines for the development of the trans-European transport network, amending Regulations (EU) 2021/1153 and (EU) No 913/2010 and repealing Regulation (EU) No 1315/2013

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
Security
SERA_EU Transport
Single Market Mutual Recognition Conformity Assessment
Telematics Applications for Freight
Telematics Applications for Passenger
Vehicles / VA
Withdrawn

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ERA Technical Document
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