(rail transport) The signals and associated equipment required for their operation.
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Signalling Sentence Examples
Between 1858 and 1868 he was employed in home waters on a variety of special services, chiefly connected with gunnery, signalling and the tactical characteristics and capacities of steam warships.
In this manner Trowbridge showed that signalling might be carried on over considerable distances by electric conduction through the earth or water between places not metallically connected.
Many novelties, too, such as the field telegraph, balloons and signalling, were employed.
A complete system of signalling by night and day on the Morse system is worked by the police.