Section 11(3) in The Calcutta Metro Railway General Rules, 2000
(3)If the motorman becomes incapacitated to run the train and cannot establish communication with Traffic Controller, the latter after a lapse of 10 minutes shall arrange to send one more motorman to the site after observing all necessary precautionary measures like switching off Traction Power. The motorman on arrival at site will take his train to the next station after ascertaining that Traction Power has been restored and he is permitted to start the train.
