Determining the Impacts of Roundabouts on Roadway Networks Status: CompleteReport Date: 07/21/2008 Summary: Roundabouts are gaining in popularity as a method for controlling traffic flow at particular intersections or portions of roadway corridors. They may, however, negatively affect overall system performance. MnDOT developed a toolbox to help cities, counties and other agencies accurately assess the impact of roundabouts on different kinds of highway systems and corridors. Final Deliverables: Report #2008-24 Research Summary Related Materials: Related Research: