STANDISH - The Maine Department of Transportation is working to construct a roundabout at the intersection of Route 25, Manchester Road, and Saco Road in Standish. The goal of the project is to alleviate congestion on Manchester and Saco Roads. Daily lane closures will require alternating traffic patterns. The contractor doing the work is R.J. Grondin & Sons of Gorham. The project is expected to be finished by August 23rd.