JonMyrlennBailey
Well-known member
Sometimes these stupid things get stuck on active and won't self-cancel for any number of reasons. How can a human driver manually cancel a grade crossing signal that is on? Switching operations near a crossing is the main culprit for them not to automatically cancel when the track is clear after the train drives away. In a real railroad, a train crewman may have some manual control of these. Stopping a train at a station near a crossing is one reason to manually cancel so as not to hold up street traffic. Pulling in and backing out of turnouts, cutting or shunting near crossings is another reason 4-trigger ATLS crossings won't work right.
ATLS controlled 4-trigger crossings only reliably self-cancel whenever a train passes the entire block of crossing triggers on its set channel without stopping and backing up before clearing the whole block of triggers.
ATLS controlled 4-trigger crossings only reliably self-cancel whenever a train passes the entire block of crossing triggers on its set channel without stopping and backing up before clearing the whole block of triggers.