scope:

This work instruction defines the requirements for the application of the LCV process on axle counter areas on Network Rail infrastructure and applies to all lines where train detection is achieved by axle counters, using the track circuit block regulations unless safety validation determines that an LCV process is not required.

The LCV process may additionally be employed in non-axle counter areas where a line clear procedure over and above that set out in GE/RT8000 or NR/OPS/NOI is deemed beneficial.

NOTE 1: Examples may include complex possessions or a series of possessions involving multiple vehicles entering or leaving the possession.

NOTE 2: It should be noted that conventional GE/RT8000 or NR/OPS/NOI processes for taking, managing and handing back possessions are not fully described within this document. This document does refer to the conventional processes to indicate where the LCV process enhances or interfaces with them

This work instruction is applicable to those involved with planning or implementing any engineering works where the LCV process is to be applied.

Purpose

The purpose of this work instruction is to manage the risk of vehicles and rail mounted plant being left on track following engineering possession subject to the Line Clear Verification (LCV) process being completed.

The LCV process supports the safe interim and final handback of a possession by providing a means of assessing that the line is clear in addition to conventional line clear procedures (as defined in GE/RT8000 or NR/OPS/NOI). The LCV process is based on the principle of a diverse means of proving the line clear and safe following engineering possession and is designed to align as closely as possible with established methods of working.