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Green Line Transformation

Riders approach a Green Line train in an MBTA station

As part of our $8 billion, 5-year capital investment plan that began July 1, 2018, we’re rebuilding and transforming the Green Line.

We'll be investing in projects to increase overall capacity on the Green Line, remove barriers to access, and make the system more resilient in the event of extreme weather. Along with the Green Line Extension (GLX) to Somerville and Medford, these short- and long-term projects will ensure that twice as many passengers have access to a safer, more comfortable, and more reliable Green Line by 2030.

Check out some of our projects, organized by line, below.

Diversions

Building a Better T 2020

A crew member cuts track at Haymarket as part of rail replacement during the first Orange Line weekend shutdown of 2020

Some of our Green Line Transformation projects are being accelerated in 2020 to deliver results to riders sooner.

Learn more about this work

Recent Updates

View all project updates

Be Part of the Green Line Transformation

We'd like to hear what you think would make the Green Line more comfortable, accessible, enjoyable, and easy to use.

Benefits

Every Green Line Transformation project meets at least one, sometimes many, of our program goals.


Green Line Extension (GLX)

GLX Rendering of Ball Plaza Station

We’re extending the northern end of the Green Line from Lechmere to Union Square in Somerville and College Avenue in Medford.

  • Contract awarded: November 2017
  • Projected completion: Fall 2021
  • Budget: $2,118,600,000
  • Status: 35% construction complete

Benefits

  • Addressing Demand: 6 new subway stops in Cambridge, Medford, and Somerville; center platforms that can accommodate longer trains
  • Accessibility: Fully accessible stations

Learn more about the Green Line Extension


New Green Line Vehicles

New Green Line D vehicle at Kenmore

We're putting 24 all-new, modern Green Line vehicles into service to prepare for increased ridership due to the Green Line Extension. These vehicles will expand the fleet from 189 to 213.

  • Contract awarded: May 2014
  • Projected completion: Spring 2020
  • Budget: $170,000,000
  • Status: First new vehicles went into service December 2018

Benefits

  • Addressing Demand: 24 new vehicles to service the Green Line
  • Accessibility: Low-floor entrances for step-free access

Learn more about the new Green Line vehicles


B Branch Station Consolidation

Rendering of the proposed station between Harry Agganis Way and Babock St, with a view of the platform.

We'll consolidate 4 B Branch stations into 2, for faster, more reliable trips along Commonwealth Ave.

  • Contract awarded: Spring/summer 2020
  • Projected completion: 2021
  • Budget: $29,328,818
  • Status: 100% design; construction to begin in 2020

Benefits

  • Addressing Demand: Faster trips down Commonwealth Ave
  • Accessibility: Full high-level boarding platforms
  • Customer Experience: All-new benches, shelters, and safety features at each station

Learn more about the B Branch Station Consolidation


Newton Highlands Station Accessibility Improvements

Rendering of the planned ramp from Walnut St to the platform below

Newton Highlands Station will be upgraded so it's accessible to people with disabilities, removing barriers to access on a portion of the Green Line.

  • Contract awarded: Expected summer 2020
  • Projected completion: December 2022
  • Budget: $22,969,104
  • Status: 80% design

Benefits

  • Accessibility: Full high-level boarding platforms; multiple accessible pedestrian crossings
  • Customer Experience: New heated shelters, benches, bicycle storage, and in-station signs

Learn more about the Newton Highlands Accessibility Improvements


Solar-Powered E Ink Signs

Closeup of an E Ink sign on the outbound platform at Beaconsfield

We're testing a variety of solar-powered E Ink signs that provide real-time train arrival information at some street-level Green Line stops.

  • Contract awarded: 2017
  • Projected completion: June 2020
  • Budget: $1.5 million
  • Status: Phase 1 pilot complete; Phase 2 in progress

Benefits

  • Customer Experience: Real-time train arrival times at more street-level Green Line stops

Learn more about E Ink


Green Line Intersection Upgrades (2019)

C Line intersection at Carlton and Beacon streets, after intersection upgrade completed

We'll replace sections of rail at vehicle crossings on the B Line, C Line, and the Mattapan Line to improve rider, pedestrian, cyclist, and driver safety.

  • Contract awarded: March 2019
  • Projected completion: Substantial completion November 2019; final completion April 2020
  • Budget: $21,000,001
  • Status: 100% construction complete

Benefits

  • Accessibility: New pedestrian pathways at 18 stations
  • Safety and Resiliency: New rail and pavement at 30 crossings to mitigate risk of service interruptions due to track conditions
  • Customer Experience: Safer pedestrian, vehicle, and bicycle crossings

Learn more about Intersection Upgrades


D Branch Track and Signal Replacement

Placing new railroad ties along the D Branch (November 2018)

We’ll replace 25,000 feet of track and 6.5 miles of signals between Beaconsfield and Riverside for faster, more reliable service on the Green Line D Branch.

  • Contract awarded: June 2018
  • Projected completion: December 2020
  • Budget: $101,600,453
  • Status: 37% construction complete

Benefits

  • Service Delivery: Speed restrictions lifted on some sections of the Green Line for faster service
  • Safety and Resiliency: New tracks and signals mitigate main causes of derailments and reduce time and money needed for maintenance

Learn more about Green Line D Track and Signal work


Fenway Portal Project

A three-person construction crew stands on the left as a Green Line D train exists the Fenway Portal and pulls into Fenway Station.

We're adding large steel doors to the entrance of the Green Line tunnel near Fenway Station to prevent flooding.

  • Contract awarded: March 2018
  • Projected completion: Spring 2020
  • Budget: $22,187,285
  • Status: 62% construction complete

Benefits

  • Safety and Resiliency: Reduce risk of damage from flooding in the Green Line central tunnel

Learn more about Fenway Portal work


Lechmere Viaduct Rehabilitation

Green Line train crosses the Charles River between Science Park and Lechmere.

We’re rebuilding the Lechmere Viaduct, which carries Green Line trains from Lechmere across the Charles River into downtown Boston. This work supports the Green Line Extension (GLX).

  • Contract awarded: December 2019
  • Construction start: January 2020 (full closure starts in May 2020)
  • Projected completion: April 2021
  • Budget: $61.8 million (construction only)

Green Line Transformation Downloads

Public Meetings

Five public meetings were held in September 2019.

View the public meeting presentation

View a summary of the public meetings

Presentations to the Board

Learn more about the Green Line Transformation by watching and downloading the presentations for the Fiscal and Management Control Board (FMCB).

Past Events

View all events

Contact Information

For all queries and comments related to Green Line Transformation, please contact GLT@mbta.com.

For More Information

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Diversions

Building a Better T 2020

A crew member cuts track at Haymarket as part of rail replacement during the first Orange Line weekend shutdown of 2020

Some of our Green Line Transformation projects are being accelerated in 2020 to deliver results to riders sooner.

Learn more about this work

Recent Updates

View all project updates

Be Part of the Green Line Transformation

We'd like to hear what you think would make the Green Line more comfortable, accessible, enjoyable, and easy to use.