scope:

Civil engineering renewals and/or maintenance activities that may require the disturbance of signal engineering equipment, systems or cables shall be managed in accordance with this instruction. On DC Electrified lines this includes work on traction return bonding.

This Work Instruction manages signal involvement in civil engineering work, but is only to be used where the Signal & Telecoms Maintenance Engineer authorises its implementation. It modifies the Signal Maintenance Testing Handbook to allow certain civil engineering work without signal engineering attendance and in particular NR/SMTH/Part4/TC00. If the Signal & Telecoms Maintenance Engineer does not authorise implementation of this work instruction, the full requirements of the Signal Maintenance Testing Handbook shall be complied with.

Purpose

To check that signal engineering resources are coordinated in support of civil and track engineering work for maintenance and minor renewals.