GPS-BASED TRAFFIC CONTROL PREEMPTION SYSTEM

• Main Authors: SCHWARTZ, MARK A, HAMER, STEVEN M, HALL, TIMOTHY J
• Format: Patent
• Language: English; French
• Published: 22.08.2006
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; GYROSCOPIC INSTRUMENTS; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; MEASURING DISTANCES, LEVELS OR BEARINGS; NAVIGATION; PHOTOGRAMMETRY OR VIDEOGRAMMETRY; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; SIGNALLING; SURVEYING; TESTING; TRAFFIC CONTROL SYSTEMS

A traffic control preemption system uses data received from a network of global position- ing satellites (GPS) to determine whether a ve- hicle issuing a preemption request is within the intersections allowed approach corridor. GPS signals are received and processed by the vehi- cle module to generate vehicle data including position, heading and velocity. The processed vehicle data and a preemption request are trans- mitted 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 com- pare the received vehicle data with a prepro- grammed map of allowed approaches to the in tersection. If the vehicle data matches suffi- ciently the map of allowed approaches to that intersection, the vehicle's preemption request is forwarded to the intersection controller.