So I'm sitting at a railroad crossing waiting for the train to pass and I got to wondering ...
What kind of signal from the train activates the gates and lights?
Some kind of pressure sensor or proximity switch or what?
Probably not the right forum but I didn't know where else to post.
What kind of signal from the train activates the gates and lights?
Some kind of pressure sensor or proximity switch or what?
Probably not the right forum but I didn't know where else to post.