These Americans Are Just Going Around in Circles. It Helps the Climate.: An Indiana city has the most roundabouts in the country. They’ve saved lives and reduced injuries from crashes — and lowered carbon emissions. - "Carmel, Ind., has the most roundabouts in the country. The main reason is safety; compared with regular intersections, roundabouts significantly reduce injuries and deaths.
"And because the city doesn’t have red lights where cars sit and idle, burning gasoline, the cars of Carmel emit many fewer tons of planet-heating carbon emissions a year.
"The reason that Carmel has so many roundabouts is Jim Brainard, the city’s seven-term Republican mayor. When he studied at the University of Oxford in the 1980s, he became taken with European traffic flow. Brainard built Carmel’s first roundabout in 1997. Now it has 140, with a dozen still to come.
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"Having greener intersections dovetails with Mr. Brainard’s climate mitigation efforts. He was among the thousands of leaders who pledged to uphold the Paris climate agreement when former President Donald J. Trump announced the American pullout in 2017. Carmel’s city vehicles are either hybrid or run by biofuels, green spaces sown with native plants have exploded in number and size, and solar panels help fuel the city’s water treatment and sewage plants. Under Mr. Brainard’s watch, the city has also added bike paths, taken out traffic lanes, widened sidewalks and increased walkability, all in an effort to get people out of their cars."
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