Evaluation of Safety and Mobility of Two-Lane Roundabouts

Principal Investigator

John Hourdos, Director, MN Traffic Observatory, Civil, Environmental and Geo-Engineering


  • Stephen Zitzow, Research Specialist, Civil, Environmental and Geo-Engineering

Project Summary

This research is expanding on a current study by collecting observations of all undesirable driving maneuvers on the remaining 2x2 roundabouts (two entering through-lanes crossing two exiting through-lanes) in Minnesota and relating the frequency of each individual type to specific design features. Although the resources this proposal is requesting will not allow for more than three roundabouts to be covered, it could be the impetus for a bigger pooled-fund study covering 15 to 20 roundabouts in several states.


  • Minnesota Local Road Research Board

Project Details

  • Start date: 05/2014
  • Project Status: Completed
  • Research Area: Transportation Safety and Traffic Flow
  • Topics: None

Reports or Products: