Massachusetts Bay Transportation Authority (MBTA) Massachusetts Department of Transportation
Green Line Extension Green Line Extension
Phase 1 Project Description


Phase 1 - Early Bridge and Demolition Package
Medford, Somerville and Cambridge, MA

The Phase 1 construction contract (E22CN01) was awarded to Barletta Heavy Division in December, 2012. They received their Notice To Proceed in January, 2013. The date for project completion is March, 2015.

Phase 1 Weekly Construction Schedule

December 2014: Harvard Street Construction and Weekend Road Closure

Medford Street Construction and Weekend Road Closures

Key Phase 1 work items include:

  • Reconstruct and widen the Harvard Street Rail Bridge in Medford
  • Widen the Medford Street Rail Bridge in Somerville
  • Demolish 21 Water Street in Cambridge in preparation for the construction of the new Lechmere Station under Phase 2/2A of the GLX project
  • Construct retaining walls and noise walls adjacent to the Harvard Street Rail Bridge
  • Relocate MBTA Commuter Rail tracks in the Harvard Street Rail Bridge area
  • Upgrade and replace existing storm drain system between Harvard Street and Granville Avenue

For more information see the Phase 1 Public Meeting Presentations Phase 1 Public Meeting Presentations

Emergency Contact Info


For emergencies relating to Green Line Extension construction work please use our
Emergency Construction Hotline - 1-855-GLX-INFO (459-4636) - 24/7 Coverage

For all other Green Line Extension inquiries please contact the project at



Construction Notice To Proceed: January 31, 2013

Progress Photos


Phase 1 Progress Photos on Flickr

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