Cars enter a roundabout at a slower speed and must yield to cars already in the roundabout. Roundabouts direct all traffic movements to the right, which helps to prevent crashes, Brown said. Drivers who approach a roundabout have a clear view of other vehicles in the roundabout. A roundabout has a smaller circumference than a traffic circle, and there is one lane in and one lane out. The consultant engineering firm was hired by Mercer County.Ī roundabout is not the same as a traffic circle. The move to replace the “Y” intersection with a roundabout grew out of a study of the area, said Brown, who works for Urban Engineers. The “Y” intersection results in many sideswipe crashes and encroachment crashes as cars headed south on the Brunswick Circle Extension attempt to merge onto Princeton Avenue with cars that are also traveling south on Princeton Avenue, said project engineer Adam Brown.
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