Somerville Ward 5 Alderman Mark Niedergang with a Green Line Extension GLX Project Update

Green Line Extension Project Updates – GLX Receives 3 Bids.

The MBTA’s Green Line Extension (GLX) project announced that on Sept. 28, 2017, three Design Build teams submitted proposals: GLX Constructors, Green Line Partners, and Walsh Barletta Granite, JV – each a collaboration of highly qualified design, engineering, and construction groups.

GLX Program Management Team is reviewing the proposals, & is now slated to issue a Notice-to-Proceed to the selected Design Build team on December 11, 2017, nearly two months ahead of the original schedule. The change is expected to allow the selected contractor to take full advantage of the 2018 construction season.

In the meantime, construction activities continue on track & signal work near the future College Avenue Station in Medford & the Red Bridge junction in Somerville & Cambridge. These activities will support a smooth hand-off to the selected Design Build contractor & continue a 7-day a week schedule, including weekend overnight work.

For inquiries relating to Green Line Extension construction work, call the Construction Hotline – 1-855-GLX-INFO (459-4636) – 24/7 Coverage. For all other Green Line Extension inquiries, contact the project at

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