A part of the Signalling SystemA series of electrical, electronic, electro-mechanical units brought together to form a system which controls the safe movement of trains. More specification that defines the detail of the
Signalling ControlsSignalling Functions that control, release or are released by other signalling functions for a particular layout. Signalling controls are expressed in a Control... More for each Signalling FunctionA Signal, set of Points or other part of the train control system. More.