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.

May 26, 2017

Starting the week of June 5, 2017 and over the course of approximately two weeks, contractors for the GLX Project will begin performing environmental subsurface exploration work to support the project. The work hours will be limited to weekdays from approximately 7 AM to 4 PM.

These activities will be along the proposed GLX rail corridor in Cambridge, Somerville and Medford which includes the Fitchburg Commuter Rail corridor to Prospect Street in Union Square and the Lowell Commuter Rail corridor to just beyond College Avenue in Medford. This work will include soil borings performed by both hand and drill rigs.

May 23, 2017

The MBTA Green Line Extension (GLX) Project Team has released the Final Request for Proposal (RFP) for the GLX Design Build (DB) contract to the three shortlisted DB teams that were identified in February of this year. View more information about the final RFP

April Updates, 2017

View the Keolis Early Works Construction information on the Construction Updates page.


There are no meetings currently scheduled.

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For Language or Access Accommodations Contact:
1-855-GLX-INFO (459-4636) or
at least one week in advance.
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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