In Carmel, Indiana — a city with more roundabouts per capita than anywhere else in America — the installation of roundabout number 140 triggered a citizen uprising so passionate it made a Granville, Ohio pancake dispute look like a polite disagreement. We're talking petitions, competing yard signs, a man who drove a tractor through one in protest, and a local news segment that went viral for all the wrong reasons. It turns out the one thing Americans will absolutely die on a hill for is their constitutional right to turn left whenever they want.