Signal Overlap

Signal overlap is an adequate distance that has to be kept clear before taking off the Home signal.It is reckoned from trailing points on single line and from Starter on double line, not less than 120 meters (MAS).

In MAS double line:-Between Starter and Advanced Starter.

On single line MAS:-Between trailing point and Advanced Starter / SLB or for an adequate distance beyond the place at which the train is required to come to a stop.

Sand hump, dead end / buffer stop are used as a substitute for signal overlap.

Adequate distance to take off Automatic signal beyond next stop signal is 120 meters on double line.