System and method for detecting traffic anomalies

  • US 6,177,885 B1
  • Filed: 11/03/1998
  • Issued: 01/23/2001
  • Est. Priority Date: 11/03/1998
  • Status: Expired due to Fees
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First Claim
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1. A traffic monitoring system monitoring traffic flow on a specific roadway section comprising:

  • an active fixed position sensor obtaining measurements of passive, non-sensor bearing-vehicles moving over a roadway; and

    , a processor co-located with said sensor and processing said measurements in accordance with an algorithm which takes into account traffic volume, traffic speed, roadway occupancy, and vehicle headway to determine, in accordance with an established set of temporal and spatial evaluation criteria if the traffic condition on the roadway, at any given time, is normal or abnormal, an abnormal condition signifying a traffic incident has occurred, said algorithm employing fuzzy logic to determine whether or not traffic conditions are normal or abnormal, the fuzzy logic employed evaluating at least the day of the week, the time of the day, the season of the year, and the specialness, if any, of the day, the preceding day, or the following day.

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