Green Line Extension Project

In November 2017, after several years of planning, the Commonwealth of Massachusetts Department of Transportation awarded a $2.3 billion contract to start construction of the Green Line Extension project (GLX) which would provide service in areas that historically did not have access to fast and reliable public transit. The project involved construction of 6 new MBTA Green Line stations along 2 branches: the Union Square Branch which began passenger service on March 21, 2022, and the Medford Branch which opened for passenger service on December 12, 2022 marking the completion of the project.

The Massachusetts Department of Transportation selected hot-dip galvanizing for the long-term corrosion protection, life-cycle cost benefit, and availability.

The Green Line Extension project was a singular project in terms of the benefit to the community as well as the significant cost. The Massachusetts Department of Transportation selected hot-dip galvanizing for the long-term corrosion protection, life-cycle cost benefit, and availability. Additionally, the Agency was concerned with timely delivery since the construction work had resulted in several road closures and detours. The fabricator, galvanizer, and contractor worked together to create a working schedule to ensure timely delivery.