What does a Cab Signal indicate?

A Cab Signal provides information about permissible speed to the train operator. It helps the conductor and engineer understand the speed limits they should adhere to while operating the train. The signals are transmitted to the cab of the locomotive, ensuring that the crew is aware of any speed restrictions that might be in place along the track.

For instance, if the cab signal indicates a certain speed, it ensures that the train operates within safe limits, which is critical for maintaining safety on the railway. By adhering to this information, the train crew can manage their speed according to existing track conditions and avoid potentially unsafe situations such as overspeeding.

The other options represent different aspects of railway operation, but are not functions of a Cab Signal. While a stop indication is vital, it pertains to fixed signals rather than cab signals. Track occupancy relates to the status of the tracks ahead, which is monitored through other systems. Lastly, a train's position is determined through various tracking methods rather than by cab signals specifically indicating permissible speed.