RIS-7708-INS Iss 1

This document sets out requirements and guidance to ensure that the visibility of signals and operational signs are not adversely affected during the life of the equipment.

RIS-7708-INS issue one supports the industry by providing additional guidance and a revised rationale for maintaining the visibility of signals and operational signs.

Content has been transferred from RIS-8034-CCS issue one Maintenance of Signal and Operational Sign Visibility so that it is more relevant for the intended users. Rationale and guidance has been improved. 

A total benefit to the industry of £258,240 over five years has been estimated as a result of changes in RIS-7708-INS, based on figures for upgrading 200 medium-sized stations, combined with reducing train delays due to obscuration from vegetation.