May 10-15 – Mass Ave Closure, Detours, and Parking Restrictions

From MassDOT:

Massachusetts Avenue Closure, Detours, and Parking Restrictions for Full Bridge Replacement, May 10-15

In order to replace the City of Boston’s bridge that carries Massachusetts Avenue over Commonwealth Avenue, Massachusetts Avenue north and southbound will be closed in the vicinity of the bridge between the Commonwealth Avenue surface roadways in Back Bay from 10:00 PM on Thursday, May 10, to 5:00 AM on Tuesday, May 15. The Commonwealth Avenue bypass roadways under the bridge will be closed to traffic as well.

Additionally, there will be a 19-day closure of the east and westbound Commonwealth Avenue bypass roadways under the bridge from Saturday, May 5, through Wednesday, May 23. The closures are necessary for the contractor to have access to the bridge substructure to prepare for and complete the full bridge replacement.

During the May 10 to 15 closure, through vehicular, bicycle, and pedestrian traffic will be detoured. Local access will be maintained to residences and businesses. At the direction of the City of Boston, parking will not be permitted along the detour routes to accommodate the additional trafficThe parking restrictions are necessary based on a public safety review to maintain emergency response access to area buildings and to minimize congestion due to higher traffic volumes on the roadways. Please view the parking restrictions flyer for details. Parking will be maintained on Massachusetts Avenue; however, parking on Commonwealth Avenue between Charlesgate East and Hereford Street will not be allowed because it is a detour route. City and State teams will monitor traffic conditions throughout the weekend and will make adjustments, as feasible, to minimize disruption and congestion.

MBTA bus service for Routes 1 and CT1 may be delayed due to the detour. Some bus stops within the project area will be closed or relocated. View the bus stop flyer for details.

Vehicle Detour Routes (see the detour map):

  • Northbound Detour Route: From Massachusetts Avenue, vehicles traveling northbound will turn right onto Boylston Street and then turn left onto Hereford Street. Continue on Hereford Street, turn left onto Beacon Street, and then turn right onto Massachusetts Avenue to continue northbound.
  • Southbound Detour Route: From Massachusetts Avenue, vehicles traveling southbound will turn right onto Beacon Street, turn left onto Charlesgate West, and then left onto Commonwealth Avenue. Continue on Commonwealth Avenue and bear right at the closed bypass roadway using the surface roadway to reach Massachusetts Avenue and turn right to continue southbound.

Bicyclist and Pedestrian Detour Route (see the detour map)

  • Through bicycle and pedestrian traffic should use the crossings at Charlesgate East and Hereford Street.

MassDOT hosted a public meeting on April 25, 2018. Responses to questions received at the meeting are posted on the website. View the question and answer document, as well as the presentation given at the meeting.

For more information about the project and to sign up for email advisories, visit the website at

For issues during the 4.5-day closure, please contact the hotline at 978-479-9170. For immediate assistance, visit the project site to discuss concerns with project or City staff.

Drivers are encouraged to avoid the area and seek alternate routes to minimize delays. Those traveling through the area should expect delays, reduce speed, and use caution. The schedule for this major infrastructure project is weather dependent and subject to change without notice.

Title VI Notice of Nondiscrimination: MassDOT complies with Title VI of the Civil Rights Act of 1964 and related federal and state statutes and regulations. It is the policy of MassDOT to ensure that no person or group of persons shall on the grounds of Title VI protected categories, including race, color, national origin, or under additional federal and state protected categories including sex, age, disability, sexual orientation, gender identity or expression, religion, creed, ancestry, veteran’s status (including Vietnam-era veterans), or background, be excluded from participation in, be denied the benefits of, or be otherwise subjected to discrimination under any program or activity administered by MassDOT. To request additional information about this commitment, or to file a complaint under Title VI or a related nondiscrimination provision, please contact MassDOT’s Title VI Specialist by phone at (857) 368-8580, TTY at (857) 368-8580, fax (857) 368-0602 or by e-mail at

If information is needed in another language, please contact the MassDOT Title VI Specialist by phone at (857) 368-8580.

Caso esta informação seja necessária em outro idioma, favor contar o Especialista em Título VI do MassDOT pelo fone 857-368-8580.
Si necesita información en otro lenguaje, favor contactar al especialista de MassDOT del Título VI al 857-368-8580.
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