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I-90 Commonwealth Avenue Bridge GraphicMassDOT has scheduled a community meeting for the Commonwealth Avenue Bridge Reconstruction Project as follows:


Thursday, June 2, 6:00 PM to 8:00 PM, Jacob Sleeper Auditorium (CGS 129), Boston University, 871 Commonwealth Avenue.

The Commonwealth Avenue Bridge Reconstruction Project will replace the existing superstructure concrete deck and steel beams that carries Commonwealth Avenue and the MBTA Green “B” Line over I-90 and the MBTA Commuter Rail line. Construction is anticipated to begin during the summer of 2017 and be completed no later than the summer of 2019. Based on current plans, the Eastbound and Green Line segments will be replaced in summer 2017, with the Westbound side following the next summer.

The existing superstructure consists of three sections:

  • one for Commonwealth Avenue (heading east)
  • one for the MBTA Green “B” Line
  • one for Commonwealth Avenue (heading west)

Constructed circa 1965, the bridge superstructure is in poor condition and in need of replacement. The deck has deteriorated, beams have significant corrosion in numerous locations, and the paint system, which was lead-based, has failed. The substructures are also in poor condition and are being rehabilitated under the I-90 Median Replacement project.

The project will replace the entire superstructure of the bridge and incorporates functional and safety improvements, including a revised bike lane layout, into the roadway. The width of the bridge superstructure will be approximately the same as it is today, and its vertical profile will be similar to avoid other impacts.

To stay informed of the latest project information and to be notified of meeting updates please sign up for email updates.

For questions and comments, please contact James Kersten, 857-368-9041 or e-mail:

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