scope:

This Network Rail standard specifies the requirements for the design and construction of track. This includes:

a) the construction of new sections of track, and routes;

b) the replacement of contiguous lengths of track components or switch and crossing layouts, either singly or in combination, as part of project or renewal activities;

c) the replacement or new construction of trackbed layers, drainage, level crossings, direct fastening systems, buffer stops or other track fixtures;

d) the replacement of components of the track system, as part of normal maintenance, that significantly changes its design or configuration (for instance the installation or removal of check rails or installation of Cast Centre Block Crossings with welded extension legs in place of part fabricated crossings).

Purpose

This standard specifies the design principles and minimum standards for the construction of new or relayed track, including the materials to be used. It also specifies acceptance criteria for new or relayed track in terms of workmanship and geometry.