Section 158(4)(v) in The Dedicated Freight Corridor Railway General Rules, 2018
(v)The Loco pilot shall make frequent use of locomotive whistle as a warning to the road traffic while approaching and passing across the level crossing. Assistant Loco pilot shall keep a sharp look-out in the rear and take measures to stop the train, if circumstances so warrant. Approved means of communication shall be used by the Loco pilot and the station master to keep informing each other the location of the train.