An Overlap that is shorter than the minimum permitted length of a Full
Overlap, which is available only when the preceding SignalA visual display device which conveys instructions or provides prior warning of instructions regarding the driver’s authority to proceed. More is subject to
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 by selection of a Warning Class RouteThe path along a section of track between one Signal and the next, along which an authorised movement is to be made. More.