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

A Message from MBTA General Manager Frank DePaola

Fellow Green Line Supporters -

I would like to update you on the current status of the Green Line Extension project, and on the steps we are taking to move the project forward.

First and foremost, work is ongoing every day on the GLX project. Over $200 million worth of construction is currently underway in Cambridge, Somerville, and Medford, including early site work, utility relocation, and the procurement of long lead items such as steel.

24 new Green Line cars are now being manufactured in Spain, and the design process continues for the balance of the project to College Avenue.

As you have probably heard or read about, however, we are experiencing a significant and very challenging growth in the cost of constructing the Green Line Extension. Our preliminary analysis indicates that the project costs may exceed our last budget estimates by as much as $700 million to $1 billion. This setback requires changes to the project and/or additional sources of funding, as well as reconsideration of whether MassDOT and the MBTA can continue with the project.

Some of the changes to the project concept that are currently being contemplated include streamlining several of the proposed stations in order to reduce their costs and downsizing the proposed vehicle maintenance facility.

We are also seeking additional funding to add to the $2 billion in state and federal resources currently available for the GLX project. New sources of funding could include municipalities; land developers; local institutions; and foundations or philanthropies. Various ‘value capture’ mechanisms could also work well with the Green Line Extension project by allowing future increases in property values to help support the costs of constructing the project.

I ask for your patience and assistance as we work through this very challenging situation. The GLX Project Team and MassDOT/MBTA as a whole are focused on addressing the issues as quickly and as thoughtfully as possible. However, we must make sure that we completely understand the current cost-to-complete of the overall project, as well as the implications of any changes to the project design.

I want to emphasize that the Baker-Polito Administration, the Federal Transit Administration, and your community leaders have all been closely involved and extremely supportive during this period. It is crucial that we approach these challenges with cooperation and collaboration. In that spirit, I urge you to share your thoughts, concerns, and suggestions at

In addition, MassDOT has recently filed an annual report with the Department of the Environmental Protection on the status of the Green Line Extension project, as well as other transportation projects required under the State Implementation Plan. Public comments on the status report can be submitted to

Additional information about the current status of the Green Line Extension can be found in the GLX Contract Presentation for MBTA Fiscal Management Control Board

Thank you for your support of the Green Line Extension project.

Frank DePaola
MBTA General Manager

Construction Info


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