Roundabouts are the preferred safety alternative for a wide range of intersections. Studies show that roundabouts reduce crashes significantly, including fatal and injury crashes for single lane urban roundabouts. Roundabouts should be considered as an option for all proposed new intersections on Federally-funded highway projects, especially those with major road volumes less than 4,000 vehicles per day. Existing intersections that have been identified as needing major safety or operational improvements should also consider roundabouts.

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