Massachusetts State Route 3A is a north-south highway along the eastern shore of Plymouth County. It runs from Massachusetts State Route 3, at Plymouth, to the Plymouth/Norfolk County Line, near Quincy. MA St Rt 3A passes through the following towns in Plymouth County. Plymouth Kingston Duxbury Marshfield Scituate Hingham MA St Rt 3A is multi-plexed is Plymouth County. Massachusetts State Route 139, at Marshfield. MA St Rt 3A intersects the following highways in Plymouth County. Massachusetts State Route 3, at Plymouth. Massachusetts State Route 3, at Plymouth. U.S. Rt. 44, at Plymouth. Massachusetts State Route 3, at Kingston. Massachusetts State Route 80, at Kingston. Massachusetts State Route 106, at Kingston. Massachusetts State Route 53, at Kingston. Massachusetts State Route 3, at Duxbury. Massachusetts State Route 14, at Duxbury. Massachusetts State Route 139, at Duxbury. Massachusetts State Route 139, at Marshfield. Massachusetts State Route 139, at Marshfield. Massachusetts State Route 123, at Scituate. Massachusetts State Route 228, at Hingham.
A guide marker in Plymouth. Photo from: Paul Dienhart
