A SignalA visual display device which conveys instructions or provides prior warning of instructions regarding the driver’s authority to proceed. More that is displayed to a train driver approaching an ABCLAbbreviated term for Automatic Barrier Crossing Locally Monitored. More or AOCLAbbreviated term for Automatic Open Crossing Locally Monitored. More
whenever the DWLAbbreviated term for Driver’s White Light. More is not LitThe internal illumination of signalling equipment. More.