05-03-2010, 04:48 PM
If the track circuit that controls the release of the aspect is failed occupied, remember that it is one of the tracks in the line of route of the signal in rear, so the signal in rear will not clear up to the approach released signal if this failure condition is present.
Of course you could have the TC operating normally and when the train has gone past the signal in rear, the TC MAY fail as the train comes along and release the signal early, but you will have had the yellow in the signal in rear.
Of course you could have the TC operating normally and when the train has gone past the signal in rear, the TC MAY fail as the train comes along and release the signal early, but you will have had the yellow in the signal in rear.