(rail transport) A device in the cab of a locomotive or train which displays the status of signals along the track.

plural of cab signal

plural of somersault signal

(rail transport) A semaphore railway signal that is pivoted in the centre of its arm.

plural of signal lad

(rail transport, UK) A young man employed in a signalbox to record the times of trains as they pass through the area served by the signalbox.

plural of signal fire

A fire lit to convey a message or serve as a beacon, by either light or smoke.

(rail transport, UK) A small explosive charge (detonator) which can be placed on a railway line in fog, to be detonated by a train passing over it as a warning signal to the driver.

plural of fog signal