Back Bay/ Mass Ave Detour and Parking Restrictions

From MassDOT, see the flyer here which includes maps of the detour and parking restrictions.

As part of the project to replace the City of Boston’s bridge that carries Massachusetts Avenue over Commonwealth Avenue, Massachusetts Avenue north and southbound will be closed to through vehicular, bicycle, and pedestrian traffic in the vicinity of the bridge between the Commonwealth Avenue surface roadways. The road will be closed from 7:00 AM on Saturday, March 10, to 7:00 PM on Sunday, March 11. Local access will be maintained. At the direction of the City of Boston, parking will not be permitted along the detour routes to accommodate the additional traffic. The parking restrictions are necessary based on public safety review to maintain emergency response access to area buildings and to minimize congestion due to higher traffic volumes on the roadways. City and State teams will monitor traffic conditions and make modifications, as feasible, to minimize disruption and congestion.

Parking restrictions will be in place on the following roadways:

  • Commonwealth Avenue – east and westbound from Hereford St. to
    Charlesgate West
  • Beacon Street – even side from Hereford St. to Massachusetts Ave.
  • Beacon Street – odd side from Massachusetts Ave. to Charlesgate West
  • Hereford Street – both sides from Boylston St. to Beacon St.
  • Boylston Street – both sides from Massachusetts Ave. to Hereford St.

Detour Route Parking Restrictions
7:00 AM on March 10 – 7:00 PM on March 11

All businesses will be open MassDOT encourages you to support your local businesses.

For more details about the Mass Ave Bridge Replacement Project, please visit the website at:

For questions, comments, or issues regarding this closure, please contact Christopher Coakley, Boston Public Works Department Public Information Officer, at 617-308-1554.