BOSTON (WBZ NewsRadio) — The MBTA has announced service changes during the month of March on several subway and Commuter Rail lines.

The agency said in a release Friday the changes are "to support critical signal upgrade work on the Orange and Red lines, MassDOT’s Maffa Way/Mystic Avenue Bridge Superstructure Replacements project, Maintenance of Way work at Bowdoin, and signal upgrade work at North Station."

Orange Line

Service will be suspended between Jackson Square and North Station during the weekend of March 1-2.
Free shuttle buses will make stops between Jackson Square and Back Bay. Riders can connect to the Green Line at Copley, where there will be free fares (inbound only). Fare gates will also be open at Jackson Square.
Service will be suspended between Oak Grove and North Station starting at around 8:30 p.m. Friday, March 7 and continuing through the weekend of March 8-9.
Free shuttle buses will make all stops between Oak Grove and North Station. Express shuttle buses will stop at Oak Grove, Malden Center, and North Station.

Red Line

Service will be suspended between JFK/UMass and Braintree during the weekends of March 8-9, March 22-23, and March 29-30.
Free shuttle buses will make all stops between JFK/UMass and Braintree. Riders are strongly encouraged to use the Middleborough, Kington, and Greenbush Commuter Rail lines for fare-free service between Braintree, Quincy Center, JFK/UMass, and South Station.

Blue Line

Service will terminate at Government Center with Bowdoin station closed starting at around 7 p.m. on Friday, March 7, continuing through the weekend of March 8-9, and all day Monday, March 10.
Service will terminate at Government Center with Bowdoin station closed starting at around 7 p.m. on Friday, March 21, continuing through the weekend of March 22-23, and all day Monday, March 24.
Riders can board and disembark the Blue Line at Government Center station, which is less than a quarter mile or about a four-minute walk from Bowdoin.

Newburyport/Rockport Commuter Rail Line

Service will be suspended between North Station and Swampscott during the weekends of March 1-2 and March 8-9.
Express shuttle buses will run directly between Swampscott and North Station. Shuttle buses will also make local stops between Swampscott, Lynn within the busway at the legacy station, Wonderland for connections to the Blue Line subway, Chelsea Station for connections to the Silver Line 3 (SL3), and North Station. The last outbound shuttle bus will also make a special late-night stop at Salem and Beverly Depot.
The Commuter Rail will be fare-free between Swampscott and Newburyport or Rockport.

Haverhill Commuter Rail Line

Service will be suspended between Oak Grove and North Station during the weekend of March 1-2.
Orange Line subway service can be utilized between Oak Grove and North Station. Passengers are encouraged to utilize Green Line service between North Station and Copley for service through the downtown area. Free shuttle buses are also replacing Orange Line service between Jackson Square and Back Bay.
Service will be suspended between Oak Grove and North Station during the weekend of March 8-9.
Free shuttle buses will replace train service between Oak Grove and North Station. Regular Commuter Rail fares will be collected between Bradford and Oak Grove. Bus Route 137 will be fare-free.

Lowell Commuter Rail Line

Service will be suspended between Anderson/Woburn and North Station during the weekends of March 1-2 and March 8-9.
Free shuttle buses will replace train service between Anderson/Woburn and North Station. Local and express shuttle bus services will be available. Local shuttle bus service will not serve Winchester Center Station.