Section 31(12) in The Delhi Metro Airport Express Line, General Rules, 2010
(12)If the train stops beyond the end of the platform, the train operator shall seek instruction from the Traffic Controller and if the traffic Controller can prevent the following train from approaching the platform by using the signaling controls, he may do so and then authorise the train at the platform to reverse until all doors are at the platform and train is correctly positioned at stopping place, otherwise, an announcement shall be made to the passengers and the train may proceed to the next station without opening the doors, and if the train is the last train of the day, the train may be reversed on instruction of the traffic controller and stopped at the normal stopping place.
