An Indiana city has the most roundabouts in the country. They’ve saved lives and reduced injuries from crashes — and lowered carbon emissions.

It’s getting harder and harder to run a stoplight here, because there are fewer and fewer of them around. Every year, at intersections throughout this thriving city, traffic lights and stop signs have disappeared, replaced with roundabouts. Lots and lots of roundabouts. There is a roundabout decorated with the local high school mascot, a greyhound and another with giant steel flowers. A three-mile stretch of Carmel’s Main Street has 11 roundabouts alone. The roundabout that locals perhaps prize the most features box hedges and a three-tier bronze fountain made in France. In 2016, it was named “International Roundabout of the Year” by no less than the U.K. Roundabout Appreciation Society, which, according to the Carmel mayor, Jim Brainard, is largely made up of “three guys in a pub.” (Their actual membership is six. But, still.)
Source: NYT Science