[MetroMPG]

A funny thing: my brother is the municipal civil engineer where I live. He's the guy who decides on things like traffic lights vs. traffic circles. He hasn't put in one in 25 years. We've talked about it. Part of the problem is we have an unusually high concentration of seniors who don't like/adapt well to change (my take, not his). Another issue (already mentioned) is roundabouts require more space. Another is they complicate snow removal.

Yet in the closest neighbouring small city, their engineer has been adding them regularly in the last 10 years or so, mostly on major roads.