Relationship between Speed and Lateral Position on Curves

Excessive speed is often cited as a primary driver factor in crashes, particularly rural two-lane crashes. It has also been suggested that speed plays a significant role in crashes on curves. However, the relationship between speed and crashes on curves is not well documented because it is difficult to determine driver speed after the fact when investigating a crash. One method to begin documenting this relationship is to explore the relationship between lateral position and speed as a crash surrogate. For this study, the researchers collected speed and lateral position data for three rural two-lane curves. The relationship between lateral position and speed was assessed by comparing the odds of a near-lane crossing for vehicles traveling 5 or more mph over the advisory speed to those for vehicles traveling below that threshold.

  • Record URL:
  • Supplemental Notes:
    • This research was sponsored by the U.S. Department of Transportation, University Transportation Centers Program.
  • Corporate Authors:

    Iowa State University, Ames

    Center for Transportation Research and Education, 2711 South Loop Drive
    Ames, IA  United States  50011-8664

    Midwest Transportation Consortium

    Iowa State University, 2711 South Loop Drive, Suite 4700
    Ames, IA  United States  50010-8664

    Research and Innovative Technology Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Hallmark, Shauna L
  • Publication Date: 2012-9


  • English

Media Info

  • Media Type: Digital/other
  • Edition: Final Report
  • Features: Figures; References; Tables;
  • Pagination: 22p

Subject/Index Terms

Filing Info

  • Accession Number: 01487938
  • Record Type: Publication
  • Report/Paper Numbers: Part of MTC Project 2009-03
  • Created Date: Jul 16 2013 11:47AM