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Green Line Extension

The Green Line Extension (GLX) will extend the northern end of the MBTA’s Green Line from Lechmere to Union Square in Sommerville and College Avenue in Medford. GLX will provide service in areas that historically did not have access to fast and reliable public transit. With an expected increased ridership of more than 50,000 passenger trips per day, this project aims to significantly reduce vehicle trips and related air emissions. The project involves the relocation and reconstruction of Lechmere Station as well as the construction of 6 new Green Line stations along 2 branches.

Contract awarded: November 2017
Budget: $2.3 billion
Status: Under construction

Working Group Members
The City of Medford has representatives working on our behalf as part of the Green Line Extension Working Group. Medford’s representatives are:

Jim Silva
Laurel Ruma
Nicole Morell

Green Line Extension Resources


What are some of the project features?

  • A new Green Line branch on existing Lowell Commuter Rail tracks, from Lechmere to Medford.

  • A new Green Line branch on existing Fitchburg Commuter Rail tracks, from Lechmere to Union Square in Somerville.

  • The relocation and reconstruction of Lechmere Station in Cambridge, plus 6 new additional T stations.

  • A new vehicle storage and maintenance facility.

What are the benefits?

  • Create additional transportation routes in the Medford and Somerville neighborhoods

  • Reduce the number of vehicles on local roads to improve traffic concerns

  • Support municipal plans for sustainability and urban redevelopment

  • A commitment to universal access, with new stations that will meet or exceed the Americans with Disabilities Act (ADA) standards.

  • Operation in existing railroad rights-of-way, reducing the need to purchase local property and minimizing construction impacts.

  • Mitigation measures that will reduce existing noise and vibration impacts from area railroads.

Contact Information

  • GLX HOTLINE: For any questions or concerns (for example about noise, lights, dust – things that need immediate attention), email, or call the 24/7 project hotline: 1-855-GLX-INFO. Dangerous conditions or injuries that require fire, ambulance or police- please call 911.

  • MBTA Accessibility: 617-337-2756,