The Fitchburg Cutoff was a rail line running 2.8 miles (4.5 km) from Brighton Street in Belmont, Massachusetts, to Somerville Junction in Somerville, Massachusetts. It was constructed in two segments in 1870 and 1881 to connect the Lexington Branch and Central Massachusetts Railroad to the Boston and Lowell Railroad. Passenger service lasted until 1927. Freight service ended in 1979–80 to allow construction of the Red Line Northwest Extension; the line was abandoned in three sections in 1979, 1983, and 2007.

Magoun Square station is a light rail station on the Massachusetts Bay Transportation Authority (MBTA) Green Line located at Lowell Street south of Magoun Square in Somerville, Massachusetts. The accessible station has a single island platform serving the two tracks of the Medford Branch. It opened on December 12, 2022, as part of the Green Line Extension (GLX), which added two northern branches to the Green Line, and is served by the E branch.