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Detection and estimation of variable speed signs

  • US 10,553,110 B2
  • Filed: 06/23/2017
  • Issued: 02/04/2020
  • Est. Priority Date: 06/23/2017
  • Status: Active Grant
First Claim
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1. A method comprising:

  • receiving probe data collected at a plurality of vehicles associated with a road segment;

    retrieving location coordinates from the probe data;

    identifying a center line for the road segment;

    calculating, by a processor, center distance values based on differences between the location coordinates and the center line of the road segment;

    determining speed values for the probe data;

    performing, by the processor, an analysis on the speed values of the probe data to identify a first cluster of probe data and a second cluster of probe data;

    averaging center distance values for the first cluster of probe data to determine a representative center distance value for the first cluster of probe data; and

    determining a lane assignment for the first cluster of probe data based on the representative center distance value of the first cluster of probe data.

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