Intersections

The first modern roundabout in Maine was opened to traffic in July 1997. The site in Gorham replaced a non-signalized intersection at the junction of Rt. 237 and Rt. 202. Before/After traffic crash data and delay data was collected and evaluated by Dr. Per Garder of the University of Maine. The one lane design has reduced delay on the minor approaches by approximately 80% during morning and afternoon peak hours. In total, the roundabout has saved 5000 to 10,000 hours of annual delay to its users. That by itself will pay for the construction of the roundabout in about five years. Crash rates were reduced and modeling indicates a significant reduction in crashes compared to a signalized intersection. Because of this success other roundabouts are being planned and/or considered throughout the State of Maine.

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