The roundabout has become an acceptable form of intersection improvement (like traffic signals and stop signs). The roundabout intersection provides several benefits when considering intersection improvements.
A roundabout can provide safety improvements to a closely-spaced intersection by channeling traffic around the central island, and using yield signs to help reduce vehicle wait time. The Federal Highway Administration released their brochure (FHWA-SA-08-006) that showed modern roundabouts provide a 76% reduction in injury crashes.
Roundabouts also provide a traffic calming effect along a roadway corridor and aesthetic benefits with landscaping at the island and around the intersection.
Roundabouts help to reduce speeds along a
Because there are slower travel speeds and no right-angle turns in a roundabout, roundabouts typically have fewer collisions when compared to intersections with signals or stop signs.
Entering the roundabout by merging with traffic takes less time than waiting at a light to cross an intersection.
Because vehicles are not idling at intersections, roundabouts contribute to less fuel consumption.
Roundabouts provide aesthetic landscaping and green space in the central island.
Roundabout intersections can navigate high left turn and U-turn movements better than other intersections.
The following resources are available to help maintain improved safety and traffic flow, environmentally-friendly, and landscape beautification benefits at roundabouts. The video and graphics provide steps for navigating single and multi-lane roundabouts for drivers, bicyclists, and pedestrians. The resources also provide guidance on what to do when large trucks, buses, and emergency vehicles travel through a roundabout. In addition, information is provided about roundabout design and frequently asked questions about roundabouts.