Traffic signal preemption system

Details Traffic signal preemption system Traffic signal preemption system

G - Physics

08

G

340/36

G08G 1/087 (2006.01)

Patent

CA 1338356

When placed into operation by the occupants of an emergency vehicle, a vehicle transmission system having a directional antenna sends out a series of UHF messages spaced apart by varying lengths of time and identifying the emergency vehicle, its priority, and its direction, or indicating that the vehicle is travelling along a pre-planned route. At each signal-controlled intersection, a vehicle detection, identification, and preemption system having an omnidirectional antenna and containing information identifying vehicles authorized to preempt the intersection and their pre-planned directions of travel receives these messages from plural vehicles and determines when and in favor of which direction and for how long the intersection is to be preempted.

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