Section 190(1) in The Dedicated Freight Corridor Railway General Rules, 2018
(1)In case the train is held up outside first Stop signal without any apparent reason for more than five minutes, the loco pilot shall sound the prescribed whistle intermittently. If the signals are still not taken "OFF" he shall call the station master on approved means of communication. If the station master does not respond, he shall depute the assistant loco pilot (except in case of trains worked with single loco pilot) to proceed to the station to warn the station master.
