Guidelines for Selection of Speed Reduction Treatments at High-Speed Intersections

Intersection crashes represent a significant portion of total crashes nationwide; they account for an average of 9,000 fatalities and 1.5 million injuries annually. Fatalities and severe injuries are more likely to occur in high-speed environments of mostly rural and suburban/urban intersections. FHWA and AASHTO recently sponsored a European scanning tour focused on innovative safety practices in the planning, design, operation, and maintenance of signalized intersections. The scanning team visited several European countries and developed an implementation plan with five major recommendations. One recommendation in the plan was for development of treatments that reduce speeds at the approaches to and through intersections. Roundabouts have been credited with significant safety improvements because they force drivers to slow down and they reduce conflicts. At conventional intersections, it should be possible to develop innovative treatments that reduce speeds and that have a significant impact in reducing injuries and fatalities to all users. The objectives of this project are to (1) identify or develop treatments and (2) develop guidelines for their selection to reduce the operating speed of vehicles approaching intersections, thereby reducing the frequency and severity of crashes. For the purpose of this project, the research should focus on at-grade, signalized and unsignalized intersections with operating speeds of 45 mph or greater, and on treatments that focus on geometric design and other physical features, but also include consideration of traffic signs and pavement markings.


  • English


  • Status: Completed
  • Contract Numbers:

    Project 3-74

  • Sponsor Organizations:

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  USA  20590

    American Association of State Highway and Transportation Officials (AASHTO)

    444 North Capitol Street, NW
    Washington, DC  USA  20001

    National Cooperative Highway Research Program

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC  USA  20001
  • Project Managers:

    Hedges, Christopher

  • Performing Organizations:

    Kittelson and Associaties, Incorporated

    13363 SE Chelsea Loop
    Tigard, OR  USA  97223-0000
  • Principal Investigators:

    Ray, Brian

  • Start Date: 20040615
  • Actual Completion Date: 20071231
  • Source Data: RiP Project 8988

Subject/Index Terms

Filing Info

  • Accession Number: 01463124
  • Record Type: Research project
  • Source Agency: National Cooperative Highway Research Program
  • Contract Numbers: Project 3-74
  • Files: RiP, USDOT
  • Created Date: Jan 3 2013 2:17PM