Guidance

NTSN: rolling stock 鈥� noise

National Technical Specifications Notices (NTSNs) relating to rolling stock 鈥� noise (NOI).

From:
Department for Transport
Published
2 May 2025

Applies to England, Scotland and Wales

Documents

PDF, 554 KB, 43 pages

This file may not be suitable for users of assistive technology.

Request an accessible format.
If you use assistive technology (such as a screen reader) and need a version of this document in a more accessible format, please email [email protected]. Please tell us what format you need. It will help us if you say what assistive technology you use.

ODT, 87.4 KB

This file is in an OpenDocument format

This file may not be suitable for users of assistive technology.

Request an accessible format.
If you use assistive technology (such as a screen reader) and need a version of this document in a more accessible format, please email [email protected]. Please tell us what format you need. It will help us if you say what assistive technology you use.

Details

This National Technical Specification Notice (NTSN) for rolling stock 鈥� noise (NOI) applies to rail projects that will seek authorisation to place new, upgraded or renewed railway equipment into service.

There are 2 documents on this page:

  • Issue 1 of the聽NTSN聽relating to聽NOI, published 1 January 2021
  • Issue 2 of the聽NTSN聽relating to聽NOI, published 2 May 2025

Issue 2 replaces Issue 1 and applies to projects聽that will seek an authorisation to place聽NOI聽subsystems into service after 2 May 2025 (without prejudice to exemptions and transitional phases).

罢丑别蝉别听NTSNs聽have been published by the Secretary of State for Transport according to regulation 3B of the聽.听

In May 2025, the Secretary of State made updates to 7聽NTSNs, which were informed by a consultation exercise and industry recommendation facilitated by the Rail Safety and Standards Board.

They are applicable in Great Britain only.

Updates to this page

Published 2 May 2025

Sign up for emails or print this page

Related content