Section 50(3)(ii) in The Delhi Metro Airport Express Line, General Rules, 2010
(ii)the train operator of the stalled train shall secure the train, switch on the flasher lights and immediately inform the Traffic Controller advising him of any infringement on other track (if any) and possibility of injuries to passengers among other things, and also inform him that he is unable to move his train, the traffic controller in consultation with the train operator shall decide the most appropriate method of evacuation, assistance needed and working of failed train cars taking into account proximity of stations, availability of trains and other local conditions and, advise the train operator the direction from which assistance is to be provided and inform the station controller at the station to which passengers shall be evacuated; and