scope:

This standard applies to all London Underground track including running lines depot track and sidings and to the vehicles that are approved to operate on this track

It applies to all platforms and to all structures and equipment both permanent and temporary which form the immediate boundary with the space provided for the passage of the rail vehicles using the Track.

It includes requirements for clearances between vehicles and structures, between vehicles on adjacent tracks and the dimensions required for places of safety.

It includes requirements for:-

a) approval of clearances prior to the commencement of works;

b) checking of clearances following work;

c) routine inspection and maintenance of clearances;

d) assessment of clearances for tunnel construction or rebuilds.

Compliance with all of the supporting information in Section 5 of this standard is mandatory.

This issue of the standard replaces S1156 A7.