A SignalA visual display device which conveys instructions or provides prior warning of instructions regarding the driver’s authority to proceed. (not itself a Stop SignalAny Signal capable of showing a Danger Aspect.) capable of displaying a Cautionary AspectAny Aspect that advises a driver that the train is required to stop at a Signal ahead. See Caution (Aspect), First Caution and Preliminary Caution (Aspect).
that informs the driver of the state of the Signals or Level CrossingAn intersection at the same elevation of a road and one or more rail tracks. See Manned Level Crossing, Automatic Level Crossing and Open Crossing. ahead.