The extension of MBTA rail service along the Greenbush Line, a branch of the MBTA Commuter Rail system, is intended to reduce congestion plaguing South Shore commuters in recent years along the Southeast Expressway , Route 3 and Route 3A. The 18-mile line restores service along the New Haven Railroad's Greenbush Branch, from downtown Boston, Massachusetts through the towns of Braintree , Weymouth , Hingham , Cohasset and Scituate on the South Shore of Boston. Prior to 2007, the last passenger trains to use this branch of the Old Colony Line ran in 1959. The station stops along the Greenbush Line are: South Station , JFK/UMass, Quincy Center, Weymouth Landing, East Weymouth, West Hingham, Nantasket Junction , Cohasset, North Scituate and Greenbush.

There is also the existing MBTA commuter rail lin of Kingston/Plymouth which makes stops at South Station, JFK/UMass, Quincy Center, Braintree, South Weymouth, Abington, Whitman, Hanson, Halifax, Kingston and The Rt. 44 extension is a 15 minute direct route from Plymouth to the Middleboro Rotary with access to Rts. 495, 24, and 195.