TRIPLE LEFT-TURN LANES AT SIGNALIZED INTERSECTIONS: EXECUTIVE SUMMARY

The use of triple left turns is seen as a means to meet constantly increasing traffic demand at signalized intersections. Although triple left turns have been in use for a number of years and their operational benefits are documented, they are still considered a relatively new design alternative that many agencies are reluctant to approve. While some excellent guidelines appear in the literature, there are no universal standards that apply. The objectives of this project were to investigate the current usage of triple left turns from an operational, safety and modeling perspective and to develop guidelines for triple left-turn installations based on these findings. This executive summary of the final report gives the objectives and tasks of the project, followed by a summary of results and list of recommendations.

• Corporate Authors:

  University of Florida, Gainesville

  Department of Civil and Coastal Engineering
  Gainesville, FL  United States  32611-6580

  Florida Department of Transportation

  Haydon Burns Building, 605 Suwanee Street
  Tallahassee, FL  United States  32301

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Courage, K
  • Stephens, B
  • Gan, A
  • WILLIS, M
• Publication Date: 2002-12

Language

• English

Media Info

• Features: Figures; Photos; References;
• Pagination: 5 p.

Subject/Index Terms

• TRT Terms: Benefits; Crash rates; Guidelines; Highway capacity; Highway operations; Highway safety; Left turn lanes; Signalized intersections; Traffic models
• Uncontrolled Terms: Triple left turn lanes
• Subject Areas: Highways; Operations and Traffic Management; I73: Traffic Control;

Filing Info

• Accession Number: 00942460
• Record Type: Publication
• Report/Paper Numbers: Executive Summary
• Contract Numbers: BC-131
• Files: TRIS, USDOT, STATEDOT
• Created Date: May 6 2003 12:00AM