RIS-3437-TOM Iss 4

This document sets out requirements to be applied when on-train equipment becomes defective and provides guidance to assist the railway undertakings in the development of contingency plans and alternative controls. It works alongside its Rule Book module, GERT8000-TW5.

A number of sections were amended and new sections created for the driver machine interface (DMI) and forward-facing cameras. The style was revised throughout to address requirements to the entity responsible. The term 'defect' was removed and replaced by 'fault' or 'failure' to align with RIS-0707-CCS or 'defective', as defined in the standard.