Locking of Movable Components, for example, PointsItems of permanent way which may be aligned to one of two positions, Normal or Reverse, according to the direction of train movement required. More when a train is
present. This is not conditional on the pointsItems of permanent way which may be aligned to one of two positions, Normal or Reverse, according to the direction of train movement required. More being Set or LockedThe state of any Signalling Function or item of equipment when it is conditionally or unconditionally prevented from changing state or position by other parts o... More. See
Dead LockingLocking which is not conditional on any other control. More.