Drivers Failing to Yield at Multi-Lane Roundabout Exits

Over 3,300 modern roundabouts have been constructed in the U.S. since the 1990s, and most of them have exhibited good to excellent operational and safety performances. However, an issue is slowly but steadily emerging with some multi-lane roundabouts that are experiencing much higher than expected crash rates. The type of crash to be investigated is associated with drivers failing to yield properly at exit – vehicles entering the roundabout from the outside lane collide with vehicles exiting the roundabout from the inside lane. Multiple factors may have contributed to the rise in crashes, such as driver mis-judgement of the available gaps, and lack of positive guidance by lane marking in the circulating lane, etc. Urgent action is needed to determine the root cause of such crashes so that proper solutions can be developed to mitigate the problem before it becomes a widespread issue that may jeopardize the implementation of roundabouts around the country. Investigate the factors contributing to crashes from Exit-Circulating path conflicts at multi-lane roundabout exits, and develop counter measures to cure this problem.

• Record URL:
  • http://www.pooledfund.org/Details/Study/634
• Supplemental Notes:
  • Final report: Reasons for Drivers Failing To Yield at Multi-Lane Roundabout Exits: Transportation Pooled Fund Study Final Report, FHWA-HRT-23-023.

Language

• English

Project

• Status: Completed
• Funding: $310,000.00
• Contract Numbers:

  TPF-5(382)

• Sponsor Organizations:

  Connecticut Department of Transportation

  2800 Berlin Turnpike
  P. O. Box 317546
  Newington, CT  United States  06131-7546

  Georgia Department of Transportation

  600 West Peachtree St
  Atlanta, GA  United States  30308

  Washington State Department of Transportation

  Transportation Building
  Olympia, WA  United States  98504

  Wisconsin Department of Transportation

  PO Box 7910
  4802 Sheboygan Avenue, Room 104
  Madison, WI  United States  53707-7910

  New York State Department of Transportation

  50 Wolf Road
  Albany, NY  United States  12232

  Florida Department of Transportation

  Research Center
  605 Suwannee Street MS-30
  Tallahassee, FL  United States  32399-0450

  City of Hilliard, Ohio

  , Ohio  United States 
• Project Managers:

  Zhang, Wei

• Start Date: 20181004
• Expected Completion Date: 0
• Actual Completion Date: 20230301

Subject/Index Terms

• TRT Terms: Countermeasures; Crash causes; Drivers; Multilane highways; Roundabouts; Traffic safety; Yielding
• Subject Areas: Highways; Operations and Traffic Management; Safety and Human Factors;

Filing Info

• Accession Number: 01709865
• Record Type: Research project
• Source Agency: Federal Highway Administration
• Contract Numbers: TPF-5(382)
• Files: RIP, USDOT, STATEDOT
• Created Date: Jul 1 2019 1:05PM