[C210N]

Roundabouts, or rotaries, can be good... when they are done right.

A rotary near me was done wrong, and required a TON of money to study it, another TON to improve and fix it.

[cgbg]

I hate the roundabouts.

Inner Boston suburbs like Cambridge have nightmare “traffic circles” that turn into dangerous gridlock during rush hour—and drivers that think that they always have the right of way—and turn driving into a game of “chicken”.

Then there is the sad story of Sedona, Arizona. They built beautiful “roundabouts” in the good old days when traffic was light. Nowadays it turns into comedy as huge campers join the high traffic fray—it is impossible for car drivers to see what is going on as the campers block all views. Drivers are more polite there so that everything just grinds to a halt.

[T.B. Yoits]

The best roundabouts I've driven through have a right turn "ramp" prior to the circle. Drivers only use the roundabout to go straight or turn left.

I couldn't find an image to post but here's the idea:
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[4 Libertys sake]

Just come to Carmel, Indiana... our mayor has replaced over 140 intersections with RABs...intent on stomping out all traffic lights.
It’s really a mixed bag of success.

[jz638]

Roundabouts, or rotaries, can be good... when they are done right.

Well, PennDOT is going to be involved, so that's right out of the question.