Warrants for Roundabouts

Roundabouts are typically considered individually to address problems at a particular intersection or along only a portion of a roadway corridor. At the project level, little consideration is given to how roundabouts impact an overall roadway corridor or system. As a result, random inclusion of a roundabout may solve safety and operational problems at the intersection where it is implemented but may affect corridor or system performance overall. Currently no resources exist to assist agencies in assessing impacts of integrating roundabouts into a corridor or system. A well thought through system-wide plan will be an improvement to the random inclusion of roundabouts into the roadway system. In order to address this deficiency, this project will develop a toolbox as a resource to assist cities, counties, and other agencies in assessing the impact that implementing a roundabout or roundabouts has on a system or corridor as a whole.


  • English


  • Status: Completed
  • Contract Numbers:



  • Sponsor Organizations:

    Minnesota Department of Transportation

    395 John Ireland Boulevard
    St Paul, MN  United States  55155
  • Project Managers:

    Moe, Clark

  • Performing Organizations:

    Iowa State University, Ames

    Center for Transportation Research and Education
    2711 South Loop Drive, Suite 4700
    Ames, IA  United States  50010-8664
  • Principal Investigators:

    Hallmark, Shauna

  • Start Date: 20061121
  • Expected Completion Date: 0
  • Actual Completion Date: 20080731
  • Source Data: RiP Project 12893

Subject/Index Terms

Filing Info

  • Accession Number: 01476373
  • Record Type: Research project
  • Source Agency: Midwest Transportation Consortium
  • Contract Numbers: 89256-1, 2006-002R
  • Files: UTC, RiP
  • Created Date: Mar 21 2013 1:00AM