Using GPS to Locate No-Passing Zones on Straight Sections of Two-Lane Highways

This article describes a method of using global positioning system (GPS) coordinates to identify the location of no-passing zones in vertical curves. It details a new application of a mathematical technique to smooth GPS data and obtain a geometric model of the roadway, then describes an analytical algorithm for analyzing the availability of sight distance along the vertical profiles of two-lane highways. The algorithm is incorporated into a computer model that can use GPS data as the input and produce a more efficient, accurate, and safe method of locating no-passing zones compared with the current field measurement methods, which place crews on highways in the presence of moving traffic. The automated system processes GPS coordinates and converts them into easting and northing values, smooths GPS data, and evaluates road profiles for possible sight restrictions, which indicate where no-passing zones should be located according to the vertical alignment. In a comparison of these results with existing pavement markings, the model shows potential for evaluating available sight distance and locating no-passing zones.

  • Supplemental Notes:
    • Abstract reprinted with permission from the publisher.
  • Authors:
    • Azimi, Mehdi
    • Williams, Cameron L
    • Hawkins Jr, H Gene
  • Publication Date: 2012-7


  • English

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Filing Info

  • Accession Number: 01482528
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 23 2013 10:41AM