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METHOD FOR CREATING SPEED PROFILES FOR DIGITAL MAPS

  • US 20110307165A1
  • Filed: 01/13/2010
  • Published: 12/15/2011
  • Est. Priority Date: 01/16/2009
  • Status: Active Grant
First Claim
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1. A method for creating longitudinally distributed speed data, said method comprising the steps of:

  • collecting probe data from a plurality of probes traversing a road segment in the form of vehicular traffic flow, each probe developing a respective probe trace comprising a sequence of discrete time-stamped probe positions;

    identifying a time span for the road segment with free flow traffic conditions;

    selecting probe data for the road segment collected during the identified time span;

    statistically deriving longitudinally distributed average speeds at positions along the road segment from the selected probe, the longitudinally distributed average speeds being representative of a free flow speed of vehicular traffic flow along the road segment;

    associating the longitudinally distributed average speeds with the road segment; and

    storing the longitudinally distributed average speeds in a digital medium.

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