Cab Signalling
Cab signalling is a system that communicates track status information to the train cab (driving position), where the train driver can see the information. The simplest systems display the trackside signal aspect, while more sophisticated systems also display allowable speed and dynamic information about the track ahead. In modern systems, a train protection system is usually overlaid on top of the cab signalling system to warn the driver of dangerous conditions, and to automatically apply the brakes and bring the train to a stop if the driver ignores the dangerous condition. Cab signalling systems range from simple coded track circuits, to transponders that communicate with the cab, and communication-based train control systems.
Read more about this topic: Railway Signalling
Famous quotes containing the word cab:
“Pockets: What color is a giraffe?
Dallas: Well, mostly yellow.
Pockets: And what’s the color of a New York taxi cab?
Dallas: Mostly yellow.
Pockets: I drove a cab in Brooklyn. I just pretend it’s rush hour in Flatbush and in I go.”
—Leigh Brackett (1915–1978)