Green Line Transformation Program

As part of the Capital Transformation Program, the Green Line Transformation (GLT) is upgrading service on the T’s most popular light rail line.
The GLT program will improve reliability and quality of service for riders and communities served by the Green Line. Achieving this requires major upgrades to tracks, signals, stations, facilities and vehicles.
Building a Better T
As part of our $9.6 billion, 5-year capital investment plan, we're renovating stations, modernizing fare collection systems, upgrading services for our buses, subways, and ferries, and improving the accessibility of the entire system.
GLT in 2023
Take a look at the work we've completed recently, and learn more about what's coming up.
All GLT Projects
Recent 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.
Tell us what you thinkRelated Projects
Green Line Extension (GLX)
The Green Line Extension (GLX) will extend the northern end of the Green Line from Lechmere to Union Square in Somerville and College Avenue in Medford.
GLT Levels of Transformation
The Green Line Transformation portfolio of projects is aligned by multiple Levels of Transformation, including:
We will upgrade infrastructure to lower the risk of high-impact events such as:
- Collisions: A new train protection system
- Derailments: Track and rail upgrades
- Flooding: Water pumps and steel doors at Fenway Portal
These infrastructure upgrades will also have the following benefits:
- Improve on-time performance to up to 90%
- Remove speed restrictions by upgrading tracks and signals
Projects with this goal include:
- D Branch Track and Signal Replacement
- Fenway Portal Flood Protection
- 2019, 2020, and 2021 Track and Intersection Upgrades
- Green Line Train Protection System (GLTPS)
We will remove barriers to access at our stations and on our vehicles:
- Improve accessibility of Green Line stations
- Introduce new vehicles with low-floor entry
Projects with this goal include:
- Newton Highlands, Symphony, Hynes, Brookline Hills, and D Branch Station Accessibility Improvements
- New Green Line Vehicles
- Green Line Extension
- 2019, 2020, and 2021 Track and Intersection Upgrades
- B Branch Station Consolidation
We will provide faster service for more people:
- Increase capacity by as much as 20,000 riders per hour
- Reduce boarding times at street-level stops
- Increase service frequency to less than 5 minutes between each train
- Reduce travel times with centralized digital signals and transit signal priority
Projects with this goal include:
- New Green Line Vehicles
- Green Line Extension
- B Branch Station Consolidation
We will upgrade stations, remove barriers to access, and make them easier to navigate:
- Reduce service delays with new, upgraded vehicles
- New shelters, walkways, and lighting so customers are safer and more comfortable
- Upgrade signs so stations are easier to navigate
- Provide real-time train arrival times at all Green Line stations
Projects with this goal include:
- New Green Line Vehicles
- Newton Highlands, Symphony, Hynes, Brookline Hills, and D Branch Station Accessibility Improvements
- Solar-Powered E Ink Signs
- Green Line Extension
- B Branch Station Consolidation
GLT Program Updates
Learn more about our GLT team members and what we've been working on each week.
- September 22, 2023
- September 15, 2023
- September 8, 2023
- September 1, 2023
- August 25, 2023
- August 18, 2023
- August 11, 2023
- August 4, 2023
- July 28, 2023
- July 21, 2023
- July 14, 2023
- July 7, 2023
- June 30, 2023
- June 23, 2023
- June 16, 2023
- June 9, 2023
- June 2, 2023
- May 26, 2023
- May 19, 2023
- May 12, 2023
- May 5, 2023
- April 28, 2023
- April 21, 2023
- April 14, 2023
- April 7, 2023
- March 31, 2023
- March 24, 2023
- March 17, 2023
- March 10, 2023
- March 3, 2023
- February 24, 2023
- February 17, 2023
- February 10, 2023
- February 3, 2023
- January 27, 2023
- January 20, 2023
- December 9, 2022
- December 2, 2022
- November 18, 2022
- November 11, 2022
- November 4, 2022
- October 28, 2022
- October 21, 2022
- October 14, 2022
- October 7, 2022
- September 30, 2022
- September 23, 2022
- September 16, 2022
- September 9, 2022
- September 2, 2022
- August 26, 2022
- August 19, 2022
- August 12, 2022
- August 5, 2022
- July 29, 2022
- July 22, 2022
- July 15, 2022
- July 8, 2022
- July 1, 2022
- June 24, 2022
- June 17, 2022
- June 10, 2022
- June 3, 2022
- May 27, 2022
- May 20, 2022
- May 13, 2022
- May 6, 2022
- April 29, 2022
- April 22, 2022
- April 15, 2022
- April 8, 2022
- April 1, 2022
- March 25, 2022
- March 18, 2022
- March 11, 2022
- March 4, 2022
- February 25, 2022
- February 18, 2022
- February 11, 2022
- February 4, 2022
- January 28, 2022
- January 21, 2022
- January 14, 2022
- December 17, 2021
- December 10, 2021
- December 3, 2021
- November 19, 2021
- November 12, 2021
- November 5, 2021
- October 22, 2021
- October 15, 2021
- October 8, 2021
- October 1, 2021
- September 24, 2021
- September 17, 2021
- September 10, 2021
- September 3, 2021
- August 27, 2021
- August 20, 2021
- August 13, 2021
- August 6, 2021
- July 30, 2021
- July 23, 2021
- July 16, 2021
- July 9, 2021
- July 2, 2021
- June 25, 2021
- June 18, 2021
- June 11, 2021
- June 4, 2021
- May 28, 2021
- May 21, 2021
- May 14, 2021
- May 7, 2021
- April 30, 2021
- April 23, 2021
- April 16, 2021
- April 9, 2021
- April 2, 2021
- March 26, 2021
- March 19, 2021
- March 12, 2021
- March 5, 2021
- February 26, 2021
- February 19, 2021
- February 12, 2021
- February 5, 2021
- January 29, 2021
- January 22, 2021
- January 15, 2021
Public Meetings and Presentations
Learn more about how we’re engaging with the public and the MBTA Board of Directors as this program progresses.
A public meeting was held in June 2022 for the GLT D Branch Station Accessibility Improvements:
A public meeting was held in May 2022 for the Green Line Train Protection and Track Upgrades:
A public meeting was held in October 2021 for the Symphony Station Accessibility Improvements:
A public meeting was held in July 2021 for the Green Line E Branch track and intersection upgrades:
A public meeting was held in April 2021 for the Green Line D Branch Station Accessibility Improvements:
A public meeting was held in March 2021 for the Symphony Station Accessibility Improvements:
A public meeting was held in January 2021 for the Green Line B Station Consolidation:
Two public meetings were held in summer 2020 for Green Line Track and Intersection Upgrades:
Five public meetings were held in September 2019.
Program update (August 31, 2022)
Program update (April 28, 2022)
Program update (June 21, 2021)
Program update (January 25, 2021)
Program update (May 13, 2019)
Program kickoff (November 5, 2018)
Program overview (May 7, 2018)
Past Events
Contact Information
For all queries and comments related to Green Line Transformation, please contact GLT@mbta.com.
To report construction issues or noise complaints, please call the project hotline: 617-222-4100.
For More Information
Get project news, updates, and information delivered to your inbox.
Building a Better T
As part of our $9.6 billion, 5-year capital investment plan, we're renovating stations, modernizing fare collection systems, upgrading services for our buses, subways, and ferries, and improving the accessibility of the entire system.
Recent Updates
Related Projects
Green Line Extension (GLX)
The Green Line Extension (GLX) will extend the northern end of the Green Line from Lechmere to Union Square in Somerville and College Avenue in Medford.