Section 160(3) in The Dedicated Freight Corridor Railway General Rules, 2018
(3)In order to warn loco pilots of trains approaching from rear on the same or adjoining lines, the sense and brake unit shall also carry an amber flasher light which can be switched 'ON' or 'OFF' by the Loco pilot. Further the amber flasher light shall be of such design that it is automatically switched 'ON' in case of parting of train.Provided further that the provision of this rule shall not apply to rail cars, or light single or coupled locomotive.
