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Round and Round

Cars going around a roundabout


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Approaching a traffic roundabout can conjure up consternation among motorists. “Which lane do I need to be in?” “Do I need to stop?” “Do I need to yield?”

Kakan Dey, assistant professor of civil and environmental engineering, hopes to alleviate this confusion — and more importantly, vehicle accidents — by studying the feasibility of a newer type of roundabout called the “turbo roundabout.” Popularized in Europe, turbo roundabouts are designed to limit weaving/lane changing movements. Their configuration forces drivers to choose an entry lane before entering the roundabout, eliminating the possibility of changing lanes within it. They also have fewer conflict points (locations where VIKTOR SZABO vehicle movements are more hazardous than others) —10 to be exact, compared to 16 for a traditional two-lane roundabout.