On-board Equipment
The on-board equipment consists of an computer that also stores the route characteristics database, a distance measurement subsystem to track train position, an antenna subsystem for the track mounted Balises, and a data radio subsystem for communication with wayside systems. In the cab, the driver has a consolidated display which displays the train's ACSES target speed along with the cab signal speed and other useful operating information.
Messages conveyed to and from locomotive and ground-based systems are made up of ATCS-encoded (Advanced Train Control Systems) message frames.
Read more about this topic: Advanced Civil Speed Enforcement System
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