RIS-0734-CCS Iss 2.1

This document sets out requirements, rationale and guidance for signing of permissible speeds applicable to trains operated on the Great Britain (GB) mainline railway.

A new section 2.9 has been added to provide requirements, rationale and guidance for acceleration indicators. The changes form part of a suite of standards changes relating to the introduction of new acceleration indicators applicable to permanent speed indicators and the termination of temporary speed restrictions. They are expected to generate significant operational benefits from a reduction in the effects of delays.

An additional requirement and guidance have been added to section 3.1 to provide clarity to the provision of permissible speed warning indicators applied within sequenced speed reductions.

Optional reading and resources:

Standards quarterly webinar - September 2024

Where do we use standards? - Control, Command and Signalling