I noted that the circles as built in NJ worked until traffic got too high. I also noted that the traffic circles in MN seemed to have been designed to imped traffic, rather than smooth it.
The deciding factor seems to be whether the State Highway Department can be trusted to build them in areas with little enough traffic and/or big enough loops to make them really free flowing. Maybe in Kansas they can. But in MN they can't, and WI is similarly progressive and anti-automobile.
You might still be in Kansas, but many of us aren't in such conservative states.
The guy who started the thread literally did.
MN they can't, and WI is similarly progressive and anti-automobile.
You are implying rounds are a conspiracy to drive people off the roads and don't even try to deny it. And your implication is insane.