SAFETY Addressing Common Crash Types at Multilane Roundabouts C By Phil Weber, P.Eng., P.E. (M) and Fred R. Hanscom, P.E. (F) onsistent with experience in other countries, on average roundabouts in the United States have been shown to reduce total motor vehicle collisions at an intersection compared to stop or traffic signal control by 35 percent, and injury collisions by 76 percent.1 Roundabouts tend to be more efficient than other types of control, especially during off-peak periods, and they can work effectively shutterstock/Carolyn Franks during power outages.2 w w w .i t e.or g Augu st 2020 35http://www.ite.org