When I was a kid they used to call a Roundabout, a Rotary. They put in Roundabouts on the roadway through Griffiss Business Park, which was once Griffiss Airforce Base here in Rome, NY. I know how to drive on them. Most other people here don’t. I usually take a different route when I go out so I can avoid them. They were part of Andrew Cuomo’s plans to expand the community college annex here, so you know someone he knew or one of his big donors got a kickback from the construction. The worst city I came across for Roundabouts is Indianapolis. It seems there’s one about every block once you get off the main highway.
I first encountered a rotary while driving to Boston from California in 1977. I had never driven on one before let alone ever seen one. I noticed that most of the cars had dents on their sides. Everyone in Boston called them rotarys. Now they have traffic circles in some areas of Carson City, Nevada and encountered them in Arizona last your near Prescott.