Section 27 in The Delhi Metro Airport Express Line, General Rules, 2010
27. Caution Order.
(1)Whenever in consequence of the track or overhead equipment being under repair, or for any other reason, special precautions are necessary, a caution order detailing the kilometers between which such precautions are necessary, the reason for taking such precautions and the speed at which the train shall travel, shall be handed over to the train operator at the stopping station short of the place where such precautions are necessary or at such other stations or work place and in such a manner as specified under special instructions and in addition, the Traffic Controller and the Station Controller shall ensure that the caution order for speed restriction has been suitably incorporated in the Continuous Automatic Train Control system.(2)The train speed shall be reduced to fifty kilometers per hour when passing through station and in case it is not possible to close any platform screen door or platform edge door, while receiving, dispatching or passing any train, the speed of the train shall be restricted to twenty kilometer per hour and an audible warning shall be sounded while entering or leaving the platform.
