Box-to-box controls to ensure enforcement of electrical Sequential LockingLocking applied to successive running Signals to enforce the replacement of one lever (arm or aspect) before the lever controlling the Signal in rear is free to... More.
Proving of Home and Distant On and BerthA location where a Train Description may be displayed by the Train Describer and which is normally associated with a Signal. More ClearA Colour Light Signal that is displaying a Proceed Aspect or a Semaphore Signal in the Off position. More before transmitting Line
ClearA Colour Light Signal that is displaying a Proceed Aspect or a Semaphore Signal in the Off position. More and the acceptanceA Block Signalling term where a train is permitted to proceed towards the ‘accepting’ Signal Box. Block regulations provide for circumstances under which a ... More of second train. See Home Normal ControlThe Home Signal lever is proved Normal (and Semaphore Signal arm On where repeated) before the Signaller can give Line Clear to the Signal Box in rear. This pre... More.