HOW SIGNALS WORK


As the train passes from block to block, the signal at the beginning of the block turns red, but the trip arm remains down.
When the last car of the train leaves the block, the stop arm goes up.
When the last car of the train leaves the second block, the signal turns yellow and the stop arm goes down.
This insures that there are at least 2 red signals and one raised stop arm behind the train.
When the train leaves the next block, the first signal turns green.


How Signals Work
How Grade Time Signals Work
How Station Time Signals Work

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- Joseph D. Korman - The JoeKorNer