GPS-based traffic control preemption system
August 16, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2355607 3831039 3886515 Remote control system for traffic signal control system Remote control system for traffic signal control system Traffic light control for emergency vehicles Traffic signal light control for emergency vehicles Method for positioning moving vehicles and exchanging communications between the vehicles and a central station Transportation vehicle location monitor generating unique audible messages Apparatus for generating a heading signal for a land vehicle InventorsApplicationNo. 515933 filed on 08/16/1995US Classes:340/907, TRAFFIC CONTROL INDICATOR340/906, OVERRIDE OF TRAFFIC CONTROL INDICATOR BY COMMAND TRANSMITTER340/988, VEHICLE POSITION INDICATION340/990, With map display340/995.1, Map display701/117, Traffic analysis or control of surface vehicle701/213Using Global Positioning System (GPS)ExaminersPrimary: Crosland, Donnie L.Attorney, Agent or FirmForeign Patent References
International ClassesG08G 001/095G06F 007/70 AbstractA traffic control preemption system uses data received from a global positioning system (GPS) to determine whether a vehicle issuing a preemption request is within an allowed approach of an intersection. GPS signals are received and processed by the vehicle module to generate vehicle data, including the vehicle's position, heading and velocity. The vehicle data is transmitted via radio transmission or some other medium. Each intersection has an associated intersection module which, if within range of the vehicle's transmitting equipment, compares the received vehicle data with a preprogrammed map of allowed approaches to the intersection. If the vehicle data sufficiently matches the map of allowed approaches, the vehicle's preemption request is forwarded to the intersection controller to appropriately control the phase of the traffic signal at the intersection.Other References
Field of SearchTRAFFIC CONTROL INDICATOROVERRIDE OF TRAFFIC CONTROL INDICATOR BY COMMAND TRANSMITTER VEHICLE POSITION INDICATION At remote location With map display Position indication transmitted by vehicle after receipt of information from local station Position indication transmitted at periodic intervals (e.g., distance travelled) Position indication transmitted by local station to remote location | |
