The change from a Proceed AspectAny Signal Aspect which permits the driver to pass the Signal. More to Red when the conditions required by
the InterlockingA general term applied to the setting and releasing of Signals and Points to prevent unsafe conditions arising; also the equipment which performs this function.... More Aspect LevelThe level of interlocking required to be satisfied before a Signal can display a proceed aspect. More cease to be satisfied. Replacement upon a
train entering the RouteThe path along a section of track between one Signal and the next, along which an authorised movement is to be made. More may be delayed (second track and/or last wheel) if
required for Propelling Movements. Also refers to the change of aspectAny valid visual indication of a Signal as displayed to the driver. More of a
Distant SignalA Signal (not itself a Stop Signal) capable of displaying a Cautionary Aspect that informs the driver of the state of the Signals or Level Crossing ahead. More to Caution.