ThatOwlWoman
Leftist Vermin
they are proven to be more efficient than 4 way stops
https://www.michiganautolaw.com/blog/2014/07/19/mythbusters-tackle-roundabout-versus-4-way-stop/
We have at least seven in our smallish city. I like them. Compared to the stoplights that they replaced, traffic moves much more smoothly, and there are a lot fewer collisions.