MA 31

Whitmans River Bridge (Worcester County, Massachusetts)
Built 1929
Stone arch bridge over Whitmans River on MA 31 (Princeton Road) in Fitchburg
Open to traffic

Willard Brook Bridge (Middlesex County, Massachusetts)
Built 1908; rehabilitated 1932
Concrete arch bridge over Willard Brook on MA 31 (State Road) in Ashby
Open to traffic