Communications-based train control (CBTC) is a system that utilizes broadcast communications between the train and track equipment for traffic management. The specific position of a train is known more precisely than with the traditional signaling systems. This results in a more productive and safe manner to deal with the railway traffic. Railway systems are able to improve headways and improve safety. A CBTC system is using high-resolution train location assurance, free from track circuits; continuous, high-capacity, and bidirectional train-to-wayside data communications.