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Grade Crossing Signals
are the warning devices for road vehicles at railroad grade crossings. The basic signal consists of two sets of flashing red lights, one on the front and one on the back, a sign that says Railroad Crossing, and a bell. At crossings that typically get train
A train is a connected series of vehicles for rail transport that move along a track to transport cargo or passengers from one place to another place. The track usually consists of two rails, but might also be a monorail or maglev guideway.Propulsion for the train is provided by a separate...
s going at about 30 mph. or more, there will be a gate added to the signal. At most crossings, the signals will activate about 30 seconds before the train arrives. The gates will get down 15–20 seconds before the train arrives. The gates will rise or the signals will shut off once the end of the train clears the island circuit. The time interval may be controlled by a Grade crossing predictor
A grade crossing predictor is an electronic device which is connected to the rails of a railroad track, and activates the crossing's warning devices at a consistent interval prior to the arrival of a train at a grade crossing ....