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Remote road traffic data collection and intelligent vehicle highway system

  • US 6,401,027 B1
  • Filed: 05/24/1999
  • Issued: 06/04/2002
  • Est. Priority Date: 03/19/1999
  • Status: Expired due to Term
First Claim
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1. A method for forecasting road traffic comprising the steps of:

  • (a) periodically collecting vehicle position data at a traffic service center, the vehicle position data being dynamically reported by equipped vehicles travelling roads in a given area, the equipped vehicles being adapted to receive geographical position data into relative vehicle position data to determine a position of the vehicle with respect to a digitized road network of nodes interconnected by straight links, the links indicating traffic directions between the nodes, the vehicle position data reported including only data related to the nodes, the geographical position data being received and converted into a relative position on the digitized road network at a predetermined collection interval (CI) and the vehicle position data being reported at a predetermined reporting interval (RI), wherein RI>

    CI;

    (b) computing at the traffic service center using the vehicle position data real travel time of vehicles travelling the links;

    (c) accounting at the traffic service center a set of real travel time samples for a link L1 from real travel times related to a given time interval starting at or including a time t on a given day D of a week; and

    (d) calculating at the traffic service center an average travel time T1 for the link L1 using the set of real travel time samples at a time t on the day D, and storing the average travel time T1 for use in predicting a travel time for the link L1.

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