Changes

Acceptance Lever working (AL) is a method of operating a single line railway without the use of [[Single line working using tokens | tokens]] or staffs. It relies on the section being [[Track Circuit]]ed throughout, with permission for trains to enter the line being given by the use of a special Acceptance Lever, that releases the signal allowing entry to the section at the other end. The Acceptance Lever is locked when a train is detected in the section by the track circuits, preventing it from either being pulled to release the signal into the section, and also from being returned to the normal position whilst a train is still travelling through the section (the signal may only be cleared once). Additionally, if the Acceptance Lever at one end is reversed (to allow a train to pass in one direction), the lever at the other end is locked, preventing permission being given for a train to proceed in the opposite direction.

*[[Single line working using tokens]]

*[[Absolute Block|Absolute Block on double lines]]