DRUID HILLS, Ga. — Roundabout explainers have been low-hanging fruit for American news operations for years, as traffic planners are installing more of them, and people can be flummoxed by these traffic circles.

We have done no shortage of roundabout stories and guides since my new traffic gig at 11Alive began, including a thorough how-to from GDOT's Natalie Dale back in September on our daily show "The Take."

Very simply, roundabouts are meant to keep traffic moving uniformly through an intersection, with cars outside of them blending in at the gaps between others inside the circle. Doing so decreases what traffic engineers call friction points, or places where cars may collide. The circles also keep traffic moving, even slowly, instead of the harsher stop-starts that stop signs and tr

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