Where facing shunting Signals exist in the line of routeThe path along a section of track between one Signal and the next, along which an authorised movement is to be made. of other routeThe path along a section of track between one Signal and the next, along which an authorised movement is to be made.
classes these will be cleared (generally automatically) before the main
(presetting) SignalA visual display device which conveys instructions or provides prior warning of instructions regarding the driver’s authority to proceed. clears.