Section 22 in The Delhi Metro Airport Express Line, General Rules, 2010
22. Failure of fixed Signals.
(1)If a train operator observes that a fixed signal is not displaying any aspect, he shall report the condition to the traffic controller.(2)If cab signal indications are available, the train shall proceed according to these indications.(3)If the train is operating without cab signal indications, the train operator shall stop the train at the signal and seek instructions from the traffic controller by radio.(4)All, concerned staff shall then follow the provisions of sub-rules (6) to (9) of rule 20.
