These are generally found at level crossings that immediately follow a station.
The normal sequencing is set to operate the barriers allowing for a stopping train to prevent the road being blocked for too long. In some case the sequence is initiated by the driver using a platform plunger.
The Non-Stop button enables the signaller to start the sequence earlier to drop and clear the level crossings for trains that do not stop at a station.
Last edited by GeoffM on 15/09/2016 at 03:00