Railroad signals 101 | Trains Magazine
https://www.trains.com/trn/train-basics/abcs-of-railroading/railroad-signals-101/
WEBJul 21, 2023 · Because trains had to approach each station prepared to stop, the “distant” signal was developed to give an advance indication of whether a stop was required at the “home” signal. WHAT SIGNALS DO: TWO TYPES, TWO FUNCTIONS. There are two types of signals, permissive and absolute. You can tell if …
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