A Roundabout Turnaround

"[Roundabouts] have long been a fixture of European countries; they're common in the eastern United States. But until recently, traffic engineers in most American cities favored broad, straight-ahead streets that kept cars moving fast...By slowing traffic and reducing conflict points, roundabouts cut fatal or disabling injuries at intersections by as much as 90%...Crashes are reduced by 39% overall; injury-producing accidents, 76%. But the safety gains don't come at the expense of traffic flow. Where roundabouts replace traffic signals or stop signs, delays are cut by as much as 76%."