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Preach! They're not great if you are prone to get car sickness, but they are safer by lowering the speed for everyone and in most low-to-medium-volume intersections they can process more traffic from more directions. What I've heard (as in, anecdotally) is that drivers in the US are not taught what it is and that pretty much nobody knows how to properly yield. Did you also get to see a turbo-roundabout? Instead of a circle, it consists of two interlocking spirals: My hometown of 100k already has more than a hundred roundabouts, but added a dozen of those in recent years because they can handle a much larger capacity. It obviously has a larger footprint, since two directions need to pick a lane, but it's pretty darn cool.