Massachusetts Bay Transportation Authority (MBTA) Massachusetts Department of Transportation
Green Line Extension Green Line Extension

The GLX Project regularly gives updates to the MassDOT Board of Directors and the MBTA Fiscal & Management Control Board (FMCB). To view the GLX presentation materials shared with these boards please visit the Fiscal and Management Control Board page of the MBTA website.

November 17, 2017

The MBTA Green Line Extension project team today held a "price opening" to select the design-build firm that will perform the design and construction for the Green Line Extension.

The winning team is a Joint Venture of GLX Constructors, with a total contract price offering of $1,082,118,600. The bid includes all six additive options and MBTA contingency. The inclusion of prioritized additive options means that in addition to track infrastructure and seven station stops, construction will include platform canopies, additional elevators at select stations, public art, additional community connection to the community path located on Chester Street in Somerville, extension of the community path between East Somerville and Lechmere Stations and an enhanced vehicle maintenance facility in Somerville.

On Monday, the Fiscal and Management Control Board will be asked to accept staff’s recommendation of GLX Constructors for the total contract price offering.

GLX Constructors is comprised of Fluor Enterprises, Inc., The Middlesex Corp., Herzog Contracting Corp., and Balfour Beatty Infrastructure, Inc.

October - November 2017

On October 17, 2017, the MBTA filed a Notice of Project Change (NPC) for the Green Line Extension Project with the Executive Office of Energy and Environmental Affairs (EEA). This NPC will be published in the November 8, 2017 edition of the Environmental Monitor. A copy of the document can be found on the Project Documents page.

The NPC presents a preliminary proposal for a one-mile extension of the Green Line along the MBTA Lowell Line commuter rail right of way from the currently planned terminus at College Avenue in Medford to Mystic Valley Parkway (Route 16) in Medford and Somerville. You can read more about the NPC on the About this Project page.

EEA will now accept public comments on this document. Comments should be addressed to:

Secretary of Energy and Environmental Affairs
Executive Office of Energy and Environmental Affairs (EEA)
MEPA Office
Attn: Erin Flaherty, MEPA Analyst
EEA No. 13886
100 Cambridge Street, Suite 900
Boston MA 02114

Comments must be received by EEA no later than 5:00 PM on Tuesday, November 28.

MassDOT and the MBTA are hosting a Public Information Meeting on the NPC on Monday, November 20 - see the meeting flyer for more information.


GLX Extension to Mystic Valley Parkway
NPC Public Meeting

Monday, November 20, 2017
6:00 PM - 8:00 PM

Tufts University Breed Memorial Hall

51 Winthrop Street, Medford, MA

* * *
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Construction Info

For all queries and comments related to the Green Line Extension project, please contact the project staff.

If you need project materials in alternative languages or formats, please submit your request here.

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