Median U-Turn Design As an Alternative Treatment for Left Turns at Signalized Intersections

Many signalized intersections experience recurring congestion and safety problems. For certain flow patterns and high traffic volumes, innovative or non-conventional designs are possible cost effective solutions. A median u-turn treatment at a signalized intersection is evaluated for a four-lane highway intersecting another four-lane road. The u-turn design is compared to a conventional geometry with direct left turning flows. TRANSIT-7F is used to optimize the signal timing and CORSIM to estimate traffic flow performance without validation or recalibration of the default parameters. A significant reduction in travel time is noted for the design with median u-turn at high volumes and high left-turning proportion. A reduction in stop time ranges from 10 to 40 seconds per vehicle.

  • Record URL:
  • Corporate Authors:

    Federal Highway Administration

    Turner-Fairbank Highway Research Center
    McLean, VA  United States  22101

    University of Maryland, College Park

    Department of Civil and Environmental Engineering
    College Park, MD  United States  20742
  • Authors:
    • Bared, Joe G
    • Kaisar, Evangelos I
  • Publication Date: 2002-2


  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; References;
  • Pagination: 16p

Subject/Index Terms

Filing Info

  • Accession Number: 01713730
  • Record Type: Publication
  • Created Date: Jul 31 2019 10:26AM