Bill, That's an excellent link to better understand them. Be sure to click on 'all answers' to see all at once.
We have a traffic circle on the university campus where I used to work and I don't ever recall an accident even with all the young, careless drivers. I think people pay closer attention when driving on them and that is part of the successful reduction of accidents. It seems maybe the roundabouts may be too small.
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Courtesy is Contagious. * In theory, theory and reality are the same.
In reality, they're different!
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