Boston Subdivision

The line runs from Back Bay Station in Boston west to Wilbraham, just east of Springfield.

The line from Back Bay to Riverside as well as from Framingham station to Worcester Union Station is owned by the Massachusetts Department of Transportation, while the segment between Riverside and Framingham is owned by the Massachusetts Bay Transportation Authority.

West of Worcester Union Station to Wilbraham, the line is owned by CSX Transportation, who has trackage rights over the entire line to reach the Dorchester Branch in Boston.

The number of tracks running into downtown Boston was reduced to two in the 1950s, in order to build the Massachusetts Turnpike, which parallels the easternmost ten miles of trackage, although CSX retains the original Boston and Albany Railroad trackage rights.

[6] Major freight facilities served by the subdivision include intermodal container yards in Worcester and Springfield, a transload facility in Westboro, near I-495, and the Northeast Automotive Intermodal Gateway in East Brookfield.