Short Notes on Track Tolerances for BG Track:

 (g) Track Tolerances for BG Track:- The safety and comfort of rail travel depend primarily on the track geometry and the standard to which it has been maintained. It is not possible in actual practice to obtain a flawless and perfect track; Parameters governing the track geometry have always certain variation. Track tolerances may be defined as the limits of variability of various parameters pertaining to track geometry. The Type of track tolerances are as under:- 

i. New track tolerances. 

ii. Maintenance tolerances. 

iii. Index tolerances. 

iv. Good riding tolerances. 

v. Slow down tolerances. 

vi. Safety tolerances. The above all tolerances are define by magnitude of track parameters i.e. alignment, defect, twist, Gauge various and unevenness.