Cab signaling is a railway safety system that communicates track status and condition information to the cab, crew compartment or driver's compartment of a locomotive, railcar or multiple unit. The information is continually updated giving an easy to read display to the train driver or engine driver.
Cab signal display unit on a Chicago Transit Authority 'L' train. The vertical light bar in the middle of the signal indicates the maximum permitted speed for the section of track where the lead car is currently located.
CDU used on Metro-North is integrated with the speedometer indicating the train speed, and the signals indicate the speed limit.
Amtrak ACSES-capable cab signal display unit showing both a miniature signal and associated speed limit.
A train protection system is a railway technical installation to ensure safe operation in the event of human error.
Berlin S-Bahn train stop in its engaged (left) and disengaged (right) position
Trackside magnets for very simple data communication. Outside and middle of track: Integra-Signum, other two (yellow) magnets: ZUB