The Milford Branch of the Boston and Albany Railroad (B&A) formerly terminated on the opposite side of Central Street, with freight tracks connecting the two lines.

The now-abandoned portion of the Milford Secondary continued north, paralleling the Charles River to its source.

It opened in 1868 from Milford to Bellingham Junction on the Charles River Branch Railroad, which ran from Boston to Woonsocket, Rhode Island.

[2][3] The southern half of the line was similarly reduced to a mixed train in 1919, and all passenger service between Ashland and Franklin Junction ended the next year.

This lasted until July 18, 1938, when all Charles River Branch service was discontinued as part of the 88 stations case.

[2][1] It resumed briefly in March 1940, but service south of Caryville (including the segment between Bellingham Junction and Franklin) ended again that May.

[1] In July 2011, a study by the Boston Region Metropolitan Planning Organization proposed implementing new MBTA Commuter Rail service along the line.

The new service was to be an extension of the existing Franklin Line, and the plan was to create a new station in Milford, before the commuter rail would diverge onto the Grafton and Upton Railroad, and eventually terminate in Hopedale.

A second Milford station was additionally proposed near the intersection of Central and Depot streets, but this location was past where the Grafton and Upton Railroad connects with the line, and it was scrapped from the project.