The $2.3 billion Massachusetts Bay Transportation Authority (MBTA) Green Line Extension (GLX) extends the existing Green Line 4.3 miles, connecting Massachusetts communities of Cambridge, Somerville and Medford with a one-seat ride to downtown Boston. STV was the lead designer for this program, as part of the design-build team led by Fluor Corporation/Middlesex Corporation/Herzog Contracting Corp/Balfour Beatty joint venture (GLX Constructors).
The program encompassed the design and construction of a new vehicle maintenance facility, an administration building, a viaduct with 50 spans, seven stations, six bridges and a community path with a pedestrian bridge.
Now complete, the MBTA anticipates several benefits for the project, including the reduction of 26,000 regional daily vehicle miles traveled, thereby improving air quality and reducing automobile congestion in the commonwealth. Daily ridership at the new GLX stations is expected to hit 45,000 by 2030.
