Green Line Extension

The Green Line extension is among the most significant expansions undertaken by the Massachusetts Bay Transportation Authority (MBTA) in decades. Work is on schedule to open for revenue service by December 2021 and at this point on the more than $2 billion project, approximately 20 percent of it is completed.

The Green Line Extension (GLX) project and the city of Somerville High School (SHS) Project have accelerated the scheduled closure of the Medford Street Bridge in Gilman Square at Pearl Street. The new closure period for the Medford Street Bridge began during the late evening of May 17, 2019, and will run through spring of 2020.

The MBTA has announced that the Green Line Extension (GLX) Project is on schedule with the next major project steps, including the temporary closure of three bridges in Somerville in order to advance GLX construction, which includes infrastructure improvements as well as widening efforts to accommodate the addition of new Green Line light rail tracks and rights of way.

United States Department of Transportation (USDOT) Secretary Elaine L. Chao was joined by FTA Acting Administrator K. Jane Williams, Massachusetts Governor Charlie Baker, Congressman Michael Capuano, Congresswoman Katherine Clark, and state and local officials on June 25 to announce the release of a $225 million federal grant agreement for the Massachusetts Bay Transportation Authority (MBTA) Green Line Extension (GLX) light rail project.

The U.S. Department of Transportation (DOT) announced that it will issue $100 million in grant funding to the Massachusetts Bay Transportation Authority (MBTA) for its Green Line Extension (GLX) light rail project. The grant represents the first installment of Capital Investment Grants (CIG) Program funding for the GLX after the Federal Transit Administration (FTA) signed a Full Funding Grant Agreement (FFGA) with MBTA for the 4.7-mi.

The Massachusetts Bay Transportation Authority is currently preparing a new bidding process to complete the $1.992 billion Green Line Extension (GLX) project in the greater Boston area. Officials, consultants and commuter activists estimated that the project was $1 billion over budget based mainly on the bidding method.