They installed a round about near us, a route I often go. It was a three way intersection, so it should work pretty well, but at least half the time some car stops dead even if zero traffic is coming the other way. They aren't common enough for visitors to realize how they operate, and no doubt some locals unfamiliar with the area. I've also had cars in the round about who stop even though they have right of way over me, and I'm already clearly stopping.
It is better than the old traffic signal there. It's a very small RAB that didn't take up much extra room. Just past that is a weird intersection that is ancient, it has an exit ramp and entrance ramp to an ancient freeway that has room for an RAB, maybe.
That freeway is from 1954, some of its concrete is still present. They built a parallel new freeway and left the old one intact for a few miles.