Civil Engineering PE

Answer: B - Roundabouts are an intersection control and management option that is used to reduce vehicle speeds and increase traffic and pedestrian safety. An Insurance Institute for Highway Safety study published in 2000 indicated that roundabouts built to date had reduced total crashed by up to 35%, injury crashes by up to 76%, and fatalities by over 90% at hazardous intersections. Roundabouts serve as traffic calming devices by slowing vehicles speeds using geometric design.