Department of Transportation Scott Kubly, Director
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Roundabouts

Roundabouts are large circular raised islands, usually landscaped, located at the intersection of two or more streets. Traffic circulates around the island in the same direction. Traffic control signing and pavement markings are used instead of traffic signals. Motorists must decrease their speed to go around the raised island. Medians are typically used with roundabouts to identify lanes and minimize pedestrian crossings. Roundabouts are not the same as traffic circles used to calm traffic.

Roundabouts

photo by Missoula Institute for Sustainable Transportation

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