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Massachusetts Avenue Bridge Replacement Project

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What's New

Beginning on Monday, November 27, MassDOT will implement alternating single lane closures on Massachusetts Avenue north and southbound in the vicinity of the bridge over Commonwealth Avenue. The lane closures will occur Monday through Friday from 10:00 AM to 2:00 PM, and will continue through mid-January 2018. The closures are necessary for the contractor to install utilities for new street lighting and traffic signals.

Eastbound vehicle traffic is now using the westbound bypass roadway under the bridge. Due to the narrow bypass roadway, eastbound bicyclists should use the surface roadway. Vehicles destined for Massachusetts Avenue from Commonwealth Avenue eastbound continue to use the surface roadway, and westbound vehicles and bicycles continue to use the surface roadway.

View the Project Documents & Meeting Materials section below for detour maps, the public meeting presentation, and a construction animation.

About the Project

The Massachusetts Department of Transportation (MassDOT) is undertaking the Massachusetts Avenue Bridge Replacement Project over Commonwealth Avenue to reconstruct the existing bridges carrying Massachusetts Avenue over Commonwealth Avenue in Back Bay. The contract was awarded to SPS New England, Inc. Accelerated bridge construction techniques will be used to minimize traffic impacts and complete the project as quickly as possible. Coordination with other projects in the area and with the City of Boston is a significant focus.

The project area extends east and westbound on Commonwealth Avenue from Charlesgate East to Hereford Street, and on Massachusetts Avenue between the ramps from Commonwealth Avenue east and westbound.

Anticipated Project & Work Schedule

  • Phase 1 - Completed on September 30, 2017
    • Rehabilitation of the bridge substructure and abutment walls along the Commonwealth Avenue westbound bypass roadway under the bridge
    • Commonwealth Avenue westbound bypass road under Massachusetts Avenue is closed, and all westbound traffic is rerouted to the surface roadway
  • Phase 2 - September 30, 2017 through end of 2017
    • Rehabilitation of the bridge substructure and abutment walls along the Commonwealth Avenue eastbound bypass roadway under the bridge
    • Eastbound traffic traveling on the bypass roadway under Massachusetts Avenue shifted to westbound bypass roadway
    • Installation of utilities for new street lighting and traffic signals
    • Access to Massachusetts Avenue from Commonwealth Avenue eastbound will be maintained. Westbound vehicles and bicyclists will continue to use the surface roadway
  • Phase 3 - Spring 2018
    • Replacement of the Massachusetts Avenue bridge over Commonwealth Avenue

Work will take place during extended daytime hours, six days a week.

The schedule is weather dependent and subject to change without notice.

Project Documents & Meeting Materials

Project Team

Owner: City of Boston

Partner: Massachusetts Department of Transportation

Contractor Team:
SPS New England, Inc. – General Contractor
Regina Villa Associates, Inc. – Public Outreach

Contact Us

For questions, comments or issues, please contact Jim Kersten, MassDOT Legislative Liaison, at 857-368-9041 or email James.A.Kersten@state.ma.us

Interested in keeping in touch with this project and receiving email advisories about traffic shifts? Sign up for Massachusetts Avenue Bridge Replacement Project over Commonwealth Avenue updates.

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