Passing the end of movement authorityPermission for a train to run to a specific location as a signalled move. More. The conventional terminology for
an overrunPassing the end of movement authority. The conventional terminology for an overrun is a signal passed at danger (SPAD). More is a signalA visual display device which conveys instructions or provides prior warning of instructions regarding the driver’s authority to proceed. More passed at dangerAn indication given by a Signal to stop. More (SPADSignal Passed At Danger (without authority). More).