New York, New Haven and Hartford Railroad and the wye connection to the west-facing lines (now used by the MBTA Commuter Rail) and the Red Line tunnel roughly underneath
However, the service between Gardner and Fitchburg was ended at the end of 1986 after the parallel Massachusetts Route 2 was upgraded to expressway standards, reducing travel time between these cities.
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Its south end is at Amtrak's Northeast Corridor, over which CSX has trackage rights to reach the Middleboro Subdivision at Attleboro and the Boston Subdivision in Boston (via the Dorchester Branch).
Its north end is at Amtrak's Northeast Corridor, over which CSX has trackage rights to reach the Framingham Subdivision at Mansfield and the Boston Subdivision in Boston (via the Dorchester Branch).
West Concord Depot is a rail station on the MBTA Commuter Rail system in West Concord, Massachusetts.