The name given to ensure that Approach ControlThe restriction of the Aspect of a Signal, to ensure that the driver can comply with the Turnout Speed, or to control the speed of a train for a Warning Call-On... More is effective. The relayAn electro-mechanical switching device used in many types of Signalling Systems. More (or
equivalent) that applies the approach controlThe restriction of the Aspect of a Signal, to ensure that the driver can comply with the Turnout Speed, or to control the speed of a train for a Warning Call-On... More, or Temporary Approach
Control, is provedEvidence provided by electrical or other means that a function is in a specified state. More not operated in the SignalA visual display device which conveys instructions or provides prior warning of instructions regarding the driver’s authority to proceed. More in rearAlternative term for Approach To. More.