Communication- based train control (CBTC) #CBTC is railway signalling system that makes use of telecommunications between the train and the track equipment for the traffic management & infrastructure control. By means of the CBTC systems, the exact position of a train is known more accurately than with the traditional signalling systems. This results in a more efficient and safe way to manage the railway traffic. Metros are able to improve headway while maintaining or even improving safety. The