Safety Effectiveness of Intersection Left- and Right-Turn Lanes

Details

• Corporate Creators:
  United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology
• Corporate Contributors:
  Turner-Fairbank Highway Research Center
• Subject/TRT Terms:
  • Turning lanes
  • Roads--Interchanges and intersections--Safety measures
  • Left-turn lanes--United States
• Publication/ Report Number:
  FHWA-RD-02-103
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  United States. Federal Highway Administration
• Abstract:
  This TechBrief summarizes a new report entitled "Safety Effectiveness of Intersection Left- and Right-Turn Lanes" (FHWA-RD-02-089). The report presents the results of research on the safety effectiveness of providing left- and right-turn lanes for at-grade intersections. The research began with a literature review. Researchers then identified and selected three types of sites for the study: improved or treatment sites, comparison sites, and reference sites. Extensive data were collected from these sites. The before study periods for the treatment sites ranged from 1 to 10 years, and the after study periods also ranged from 1 to 10 years. Tables are presented summarizing the safety effectiveness of installing left-turn lanes on the major-road approaches to rural and urban intersections, respectively. Another table presents comparable effectiveness estimates for right-turn lanes that are applicable to both rural and urban intersections.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/41541/dot_41541_DS1.pdf
• File Type:
  [PDF - 667.76 KB]
• Collection(s):
  Federal Highway Administration
• Main Document Checksum:
  urn:sha-512:2356344bb5358f77a3a0a14965264c2673465a5b6b181440ac9d2c49d10718ab56107878b0ec6cca0190d08e2c655d5dc3c6847ac8a1c32caca239ee28b2574e