Evaluation of Safety and Mobility of Two-Lane Roundabouts Status: CompleteReport Date: 07/31/2017 Summary: Researchers studied driving behavior at four multilane roundabouts to better understand the relationship between traffic control designs and driver errors. Data collected showed that certain traffic control changes decreased turn violations but failed to eliminate yield violations. Researchers were unable to identify long-term solutions for improving roundabout design and signage, and recommended further research to improve the overall safety and mobility of multilane roundabouts. Final Deliverables: Report #2017-30 Research Summary Related Materials: Transportation Safety Webinar: Evaluation of Safety and Mobility of Two-Lane Roundabouts - (Video/Webinar) Transportation Safety Webinar: Evaluation of Safety and Mobility of Two-Lane Roundabouts - (Video/Webinar) Related study: Effect of Signing and Lane Markings on the Safety of a Two-Lane Roundabout - (Other) Related Research: