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How roundabouts work

Roundabouts, used in place of stop signs and traffic signals, are a type of circular intersection that can significantly improve traffic flow and safety, according to the American Insurance Institute for Highway Safety. In this 2010 video, IIHS explains that where roundabouts were installed, motor vehicle crashes declined by about 40 percent, and those involving injuries were reduced by about 80 percent.
IIHS

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