Patent ID: 6061625
Filing Date: 2000-05-09
Classification: G08G

Abstract:
A process for obtaining traffic situation data in a compressed form, while largely maintaining data reliability, comprising the steps of:determining a speed profile with a vehicle that moves in traffic and belongs to a sampling vehicle fleet;wirelessly transmitting speed profile data to a traffic center from time to time;continually determining current speed values of the vehicle, in the vehicle;in the vehicle, determining characterizing numbers that characterize discrete segments of the vehicle speed profile from the current speed values, the characterizing numbers being characteristic of a curve of the speed actually travelled in a given segment;continuously forming the discrete segments of the speed profile during a vehicle trip, by defining an end of a current segment, and thus a beginning of a new segment, based on results of a comparison between the speed profile of the vehicle and a speed profile of at least one virtual reference vehicle; andwhen a new segment begins, storing the characterizing numbers of current segment just finished in the vehicle at least until being transmitted to the traffic center.