I lived in England for seven years, they have Roundabouts all over the place, an traffic moves easily. The Biggest thing is their Roundabouts are designed for safe driving, No curbs, hard angles when entering or exiting, good line of sight. Village Roundabouts are just designed incorrectly. There are a few in Maryland and they also are of bad design. Use Google Maps of other map program and look at roads in the UK. There are even some Doubles.
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