Massachusetts Bay Transportation Authority (MBTA) Massachusetts Department of Transportation
Green Line Extension Green Line Extension
Medford St. Detour Details


Phase 1 Project Description

The Green Line Extension Project (GLX) wanted to let you know that as of 3:30 PM on August 1, 2014, Medford Street in Somerville will be reopened to traffic. The GLX Phase 1 work that necessitated this current closing is now complete.

Starting Monday, August 4, 2014, the continuing bridge construction will necessitate single lane closures through to the end of 2014. The single lane closures would only be from 9 AM – 3:30 PM, Monday – Friday. During these single lane closures vehicular traffic will still be allowed in both directions, and the police detail officers will be assisting in alternating the traffic through the single available lane. During these single lane closures, pedestrians will be restricted to a single sidewalk, otherwise both sidewalks will be open.

Upcoming Medford Street Bridge work includes bridge widening steel erection which will require 3 to 4 full roadway closures during the weekend. The traffic plan for this closure will be the same as that utilized during the 7/21/14 – 8/1/14 closure. View the Medford Street Detour Map

In order to ensure pedestrian safety during these weekends of steel erection, it will be necessary to close the sidewalks as well. View the Medford Street Pedestrian Detour Map

The dates for the weekend closures are as follows (please note that these dates are forecast and subject to change):

  • 9/13 – 9/14/14 - COMPLETE
  • 10/4 – 10/5/14 - COMPLETE
  • 10/25 – 10/26/14 - NOT NEEDED, NO CLOSURE
  • Additional weekend to be determined (if necessary) - NOT NEEDED, NO CLOSURE

Local Medford Street businesses will remain open during these closures.

The GLX project would like to thank the Cities of Somerville and Cambridge for their continued assistance and cooperation. Working together the project will be able to complete this important bridge work while minimizing the impacts on the community.

This work is part of the widening of the Medford Street Railroad Bridge to allow for Green Line tracks to run alongside the Commuter Rail tracks and an important step in bringing the Green Line from Cambridge to Somerville and Medford.

As always, if you have any questions, you can email us at or contact the Green Line Extension Project at 855-GLX-INFO (855-459-4636).

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