Section 229(5) in The Dedicated Freight Corridor Railway General Rules, 2018
(5)When more than one relief trains are being sent, following each other before the first one has reached the site, the speed of successive trains shall be restricted as in sub-rule (4) of the 229 right from the despatching station, and the Loco pilot of each of them shall protect his train by deputing a railway servant to show hand danger signal forty five meters away in the rear in case their train is stopped in between before reaching the place of obstruction.G - Report of conditions likely to affect running of trains
