Only effective if the cameras are working; kinda' like the recent subway shooting in Brooklyn; Cameras malfunctioned during NYC subway shooting...why with all the technology we possess, there isn't cameras at each intersection that would give a warning to trains that the crossing is blocked...
Your correct, it will, but typically that is only to signal for the arms to drop at the crossing, and may not be soon enough for a 150 car train to shut down in time, but its worth a shot!the best thing that i have been told from someone that worked 25 years with the RR is if your stuck on some tracks to grab some jumper cables or a log chain and connect the 2 rails together and it will trip the switch to the signal down the track.
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