YE CMS CROSSING KA RAIL TRACK PAR KYA KAAM HAI ?

[@priyamganguly]

1) At 01:57, the gap between stock rail and switch rail is mentioned to be 112 to 118. What's the unit of that measurement, mm or cm? 2) What are those iron structures that look like snakes that could be seen in the middle of the track at 03:55 and on both sides of the internal lead rails at the crossing at 04:23? What are those snake-like structures used for?