Section 192(1) in The Dedicated Freight Corridor Railway General Rules, 2018
(1)Except under special instructions, the loco pilot shall always sound the whistle of the locomotive according to the prescribed code of whistle or the following circumstances, namely,-(a)before putting a locomotive in motion;(b)when entering a tunnel;(c)when approaching a manned or unmanned level crossing; and(d)at such other times and places as may be prescribed by special instructions.
