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Rail News Home Passenger Rail

2/25/2019



Rail News: Passenger Rail

MBTA resumes construction of Green Line light-rail extension


GLX construction crews at work.
Photo – mbta.com

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The Massachusetts Bay Transportation Authority (MBTA) will resume construction of its Green Line light-rail extension project, temporarily closing threes bridges in Somerville, Massachusetts starting March 22.

The Green Line Extension (GLX) project includes infrastructure improvements and widening efforts to accommodate light rail tracks and rights of way, which will lead to three bridge closures, MBTA officials said in a press release.

The Broadway and Medford Street bridges, for example, are wide enough only to accommodate the existing commuter-rail service that operates beneath them. The Broadway bridge will be replaced with a wider bridge featuring a center column pier-style foundation, new east and west abutment foundation and wall, and a lengthened roadway surface deck.

The Medford Street bridge will have its pier and abutment structures reconstructed and widened.

The Washington Street bridge requires a complete reconstruction of abutments and structural span to accommodate a light rail service and pathway.

GLX's first phase of construction has been completed. That phase included reconstruction of the Harvard Street rail bridge in Medford and the Medford Street rail bridge in Somerville, as well as demolition of MBTA-owned facilities. Once completed, the Green Line will be extended north and include seven new stations.



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