NR NR/L2/TRK/001/MOD12 ISSUE 8 PDF

This module of NR/L2/TRK/001 covers:

a) geometry design tolerances;

b) track position maintenance tolerances and intervention limits;

c) Absolute Track Geometry (ATG);

d) use of Local designs;

e) maintenance by on-track machines (OTM), including:  

 • measurement and compensation;  

 • design over-lift systems;  

 • maintenance of S&C;

f) loading on structures;

g) on-site geometry marking;

h) details of geometry records to be kept.