From the City of Northampton Transportation Policies The suitability of roundabouts and mini-roundabouts will be evaluated during the preliminary engineering analysis for all intersections being considered for significant reconstruction, realignment, signalization, and four-way stops. Roundabouts are the favored intersection treatment for safety, efficiency, and environmental reasons, when appropriate.
Source: Insurance Institute for Highway Safety
Traffic congestion and motor vehicle crashes are widespread problems, especially in urban areas. Roundabouts, used in place of stop signs and traffic signals, are a type of circular intersection that can significantly improve traffic flow and safety. Where roundabouts have been installed, motor vehicle crashes have declined by about 40%, and those involving injuries have been reduced by about 80%. Crash reductions are accompanied by significant improvements in traffic flow, thus reducing vehicle delays, fuel consumption, and air pollution.