Cab signalling is a railway safety system that communicates track status information to the cab, crew compartment or driver's compartment of a locomotive, railcar or multiple unit, where the train driver or engine driver can see the information.
The simplest systems display the trackside signal aspect (typically, green, yellow or red, indicating whether it is safe to proceed or not), while more sophisticated systems also display allowable speed, location of nearby trains, 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. These systems range from simple coded track circuits to transponders that communicate with the cab, to communication-based train control systems.
Read more about Cab Signalling: Overview, Hierarchy of Cab Signal Systems, Information Transmission, Typology of Cab Signalling Systems, Cab Signalling Systems in The US, Positive Train Control, Audio Frequency Track Circuits
Other articles related to "cab signalling, cab, signalling":
... of signal aspects which can change between block boundaries, similar to pulse code cab signals ...
... almost always integrated with existing continuous cab signalling systems ... of speed control based on the inputs of the cab signalling system ... speed allowed for that portion of track, an overspeed alarm sounds in the cab ...
... One issue in doing so is signalling ... require 1,543 m (5,062 ft) to stop, exceeding the signalling distance ... Another would be to introduce multiple aspect signalling ...
... A cab signal (車内信号, shanai shingō) is a device displaying a signal in a train cab ... Line, Shinkansen and some rapid transit lines use cab signalling ... On the Shinkansen, cab signals were introduced because it is difficult to see track-side signals at high speed ...
... The newest systems use cab signalling, where the trains constantly receive information regarding their relative positions to other trains ...
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