Grade crossing signals
（重定向自Grade crossing predictor）
![Grade crossing signal with flashing lights and gates by GRS. The device is still active in Florida Oeste, Buenos Aires.](/Images/godic/202501/16/Barrera_Yrigoyen_Florida0446.JPG")
![Grade Crossing cantilever signal in Trout Lake, Michigan.](/Images/godic/202501/16/Trout_Lake,_Michigan_Railroad_crossing0446.JPG")
![](/Images/godic/202501/16/Signal10446.jpg")
![Warning device in Australia, with crossbuck and flashing lights.](/Images/godic/202501/16/LED_railway_level_crossing_signal0446.jpg")
Grade Crossing Signals are the electronic warning devices for road vehicles at railroad grade crossings.
The basic signal consists of flashing red lights, a crossbuck and a bell, attached to a mast. At most crossings, the signals will activate about 30 seconds before the train arrives.