GPS-BASED TRAFFIC CONTROL PREEMPTION SYSTEM.

摘要

A traffic control preemption system uses data received from a network of global positioning satellites (GPS) to determine whether a vehicle issuing a preemption request is within the intersections allowed approach corridor. GPS signals are received and processed by the vehicle module to generate vehicle data including position, heading and velocity. The processed vehicle data and a preemption request are transmitted via radio transmission to all intersection modules located at intersections within range of the radio signal transmitted by the vehicle module. The intersection modules then compare the received vehicle data with a preprogrammed map of allowed approaches to the intersection. If the vehicle data matches sufficiently the map of allowed approaches to that intersection, the vehicle's preemption request is forwarded to the intersection controller.