Grade Crossing Predictor

Grade Crossing Predictor

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 where trains travel at 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 be fully lowered 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.