Evaluation of Roundabout Crash Rates and Effectiveness

Summary:

The purpose of this project was to provide guidance to support identification and selection of roundabout intersection treatments. The guidebook focuses on: • Summarizing the key characteristics of common roundabout types; • Describing safety and operational performance considerations; • Providing decision trees that can be applied before detailed operational modeling; and • Describing when Intersection Control Evaluation (ICE) and Roundabout Justification Reports (RJR) are needed. A related brochure summarizes the improved safety at roundabouts.

Final Deliverables:

• Roundabout Design and Selection Guide (Guidebook #2026RIC07)
• Roundabouts Safer for all Travellers (Fact Sheet #2026RIC07B)

Related Materials:

Related Research:

Project Personnel:

Principal Investigator:  Renae Kuehl

Technical Liaison:  Matt Wegwerth

Project Coordinator:  Briah Carlson

Panel Members: 
Chad Hausman - Wright County
Derek Leuer - Traffic Engineering
Dillon Dombrovski - City of Rochester
Girma Feyissa - State Aid for Local Transp
Greg Kimman - City of Little Falls
JinYeene Neumann - Carlton County Transportation Department
Joe Gustafson - Washington County Public Works - Engineer
Katelyn Vue - Minnesota Daily, University of Minnesota
Kenneth Johnson - Traffic Engineering
Mark Vizecky - State Aid for Local Transp
Ryan Thilges - Blue Earth County
Shannon Grabow - 
Victor Lund - St. Louis County Public Works - Engineer