GREAT BARRINGTON — Work on the state's freight railroad corridor that runs from northern Connecticut to Pittsfield has resumed, but it won't result in any road closings or detours.

The state Department of Transportation said Tuesday that contractors will replace the railroad bridge near Park Street north in Housatonic, and rebuild private railroad crossings near Van Deusenville Road and North Plain Road in Great Barrington, and the Furnace Road grade crossing in Stockbridge.

The agency began this second phase of work to the Berkshire Line Railroad that includes adding ballast to the track, upgrading rails and replacing equipment. The work is to prepare for more construction on the line next spring, due for completion in the summer.

It is part of a $21 million initial overhaul of the rail corridor to make it faster and safer, the agency has said.

In 2015, the state purchased the line from Housatonic Railroad Co. for $12 million, to upgrade the line for freight and possibly to revive the passenger line from New York City to Pittsfield that operated here until 1971.

Heather Bellow can be reached at or on Twitter @BE_hbellow and 413-329-6871.