Mini Roundabout FAQs

Roundabouts have been effective at increasing safety and efficiency of vehicle traffic. Traditional roundabout design typically requires a larger “footprint” than a traditional four-way intersection. More local agencies are implementing “mini roundabouts,” a type of roundabout characterized by a small diameter and fully traversable islands (central island and splitter islands). The focus of this implementation project will be an FAQ document that: Defines and educates local agencies on use of mini and compact roundabouts; Provides selection criteria on when to use and details regarding the center treatment; Synthesizes and provides easy navigation to technical information.


    • English


    • Status: Active
    • Contract Numbers:

      1036675 WO#8

    • Sponsor Organizations:

      Local Road Research Board

      395 John Ireland Boulevard
      St. Paul, Minnesota  United States  55155-1899
    • Managing Organizations:

      Minnesota Department of Transportation

      395 John Ireland Boulevard
      St Paul, MN  United States  55155
    • Performing Organizations:

      SRF Consulting Group, Incorporated

      One Carlson Parkway North, Suite 150
      Minneapolis, MN  United States  55477-4443
    • Principal Investigators:

      Marti, Michael

    • Start Date: 20220701
    • Expected Completion Date: 20240831
    • Actual Completion Date: 0

    Subject/Index Terms

    Filing Info

    • Accession Number: 01836024
    • Record Type: Research project
    • Source Agency: Minnesota Department of Transportation
    • Contract Numbers: 1036675 WO#8
    • Files: RIP, STATEDOT
    • Created Date: Feb 16 2022 2:00PM