However, summer-only trains from New York to Hyannis used the line from Attleboro to Middleborough from 1960 to 1964, as did Boston–Hyannis service on the Taunton–Middleborough section briefly in 1961.

[5] Portions of the Middleborough Secondary are planned for passenger use as part of the South Coast Rail project.

The MBTA issued a $403.5 million contract for the Middleborough Secondary and New Bedford Main Line portions of the project on August 24, 2020; construction was expected to begin later in 2020 and take 37 months.

[6] Phase 2, planned for 2030, will extend passenger service from the Providence/Stoughton Line to New Bedford and Fall River, and will involve the construction of new track connecting Stoughton to the Dighton and Somerset Railroad; trains will run along this new track, down the Dighton and Somerset Railroad, and then along the Middleborough Secondary from Weir Junction to Cotley Junction.

When Phase 2 is completed, service from Middleborough to New Bedford and Fall River will be eliminated (but will kept as a backup option in the event of service/delays cancellation along the old Dighton and Somerset line), and Middleborough/Lakeville Line will terminate at Pilgrim Junction; the section of the Middleborough Secondary east of Cotley Junction will return to being used only for freight service.