The releaseThe removal of Locking on a function, for example, the removal of Route Locking or the unlocking of a function such as a Ground Frame. More of Route LockingA form of Interlocking which maintains the locking associated with a Route in use until after the train has passed clear of the equipment being Locked (for exam... More. See also Sectional Route ReleaseRoute Releasing designed to release sequentially, usually one track section at a time behind the train. More.