These Americans Are Just Going Around in Circles. It Helps the Climate.


America's capital of the traffic roundabout is Carmel, Indiana, a city of 102,000 people and 140 roundabouts. The city boasts exceptionally low rates of traffic deaths and injury crashes. Studies of roundabout use elsewhere show benefits as well in pedestrian and bicycle safety, and in cutting environmentally harmful emissions because traditional intersections cause much longer idling times. Not all drivers like them, but Carmel long ago overcame initial qualms when the longtime mayor put into practice the traffic idea he admired when he was a university student in England.

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