Road information communicating system
August 18, 2019. 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 ReferencesRemotely controllable message broadcast system including central programming station, remote message transmitters and repeaters Electronic billboard and vehicle traffic control communication system Traffic monitoring and management method and apparatus Traffic management system Optimal and stable route planning system Traffic information system Condition reactive display medium Traffic information system Process and system for ascertaining traffic conditions using stationary data collection devices System and method for communicating location and direction specific information to a vehicle InventorsAssigneeApplicationNo. 376228 filed on 08/18/1999US Classes:701/117, Traffic analysis or control of surface vehicle340/993, Position indication transmitted by local station to remote location455/456.6, At remote station (i.e., mobile station)701/207Employing position determining equipmentExaminersPrimary: Nguyen, Tan T.Attorney, Agent or FirmForeign Patent References
International ClassG01C 021/20Foreign Application Priority Data1998-08-27 JPAbstractA road information communicating system is provided in which a central communication system communicates with vehicles using a network of distributed information processing units. Each of these distributed information processing units is able to receive local road information and compute a set of local coordinates corresponding to that local road information. It is then able to relay that information to the central unit and receive like information from other distributed units. The information is then prioritized, and a subset of that prioritized data is selected and transmitted to vehicles in the coverage area.Field of SearchTraffic analysis or control of surface vehicleWith determination of traffic density With determination of traffic speed Determination of travel data based on the start point and destination point Determination of along-track or cross-track deviations Having audio or visual route guidance Employing position determining equipment For use in a map data base system Highway information (e.g., weather, speed limits, etc.) Relative distence between vehicles (e.g., collision alert) Transmitter in another vehicle (e.g., emergency vehicle) 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 Prerecorded message describes position Location display | |
