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.

Diversions Green Line Service Changes Green Line Service Changes We'll be performing maintenance and planned work on the Green Line to bring you better, safer, and more reliable subway service.

Building a Better T 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

GLT in 2020 Take a look at the work we've completed so far in 2020—and what's coming up this fall.

Benefits Every Green Line Transformation project meets at least one, sometimes many, of our program goals. Safety and Resiliency We will upgrade infrastructure to lower the risk of high-impact events such as: Collisions: A new train protection system

A new train protection system Derailments: Track and rail upgrades

Track and rail upgrades Flooding: Water pumps and steel doors at Fenway Portal Projects with this goal include: D Branch Track and Signal Replacement

Fenway Portal Project

Intersection Upgrades Addressing Demand We will provide faster service for more people: Increase capacity by as much as 20,000 riders per hour

by as much as 20,000 riders per hour Reduce boarding times at street-level stops

at street-level stops Increase service frequency to less than 5 minutes between each train

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 Consolidation Service Delivery We will meet our own policies for service expectations: Improve on-time performance to up to 90%

to up to 90% Remove speed restrictions by upgrading tracks and signals

by upgrading tracks and signals Reduce service delays with new, upgraded vehicles Projects with this goal include: D Branch Track and Signal Replacement

Green Line Extension Accessibility We will remove barriers to access at our stations and on our vehicles: Make all Green Line stations accessible

Ensure step-free boarding at all platforms

at all platforms Introduce new vehicles with low-floor entry across the fleet Projects with this goal include: Newton Highlands, Symphony, Hynes, and Brookline Hills Accessibility Improvements

New Green Line Vehicles

Green Line Extension

Intersection Upgrades

B Branch Station Consolidation Customer Experience We will upgrade stations, remove barriers to access, and make them easier to navigate: 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: Newton Highlands, Symphony, Hynes, and Brookline Hills Accessibility Improvements

Solar Powered E Ink Signs

Green Line Extension

B Branch Station Consolidation

Green Line Extension (GLX) 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

November 2017 Projected completion: December 2021

December 2021 Budget: $2.3 billion

$2.3 billion Status: Construction

Benefits Addressing Demand: 6 new subway stops in Cambridge, Medford, and Somerville; center platforms that can accommodate longer trains

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 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

May 2014 Projected completion: Spring 2020

Spring 2020 Budget: $170,000,000

$170,000,000 Status: First new vehicles went into service December 2018

Benefits Addressing Demand: 24 new vehicles to service the Green Line

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

Contract awarded: Spring/summer 2020

Spring/summer 2020 Projected completion: 2021

2021 Budget: $29,328,818

$29,328,818 Status: 100% design; construction to begin in 2021

Benefits Addressing Demand: Faster trips down Commonwealth Ave

Faster trips down Commonwealth Ave Accessibility: Full high-level boarding platforms

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 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

Expected summer 2020 Projected completion: December 2022

December 2022 Budget: $22,969,104

$22,969,104 Status: 80% design

Benefits Accessibility: Full high-level boarding platforms; multiple accessible pedestrian crossings

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

Symphony Station Accessibility Improvements We’re renovating Symphony Station to improve accessibility, safety, and customer experience.

Design contract awarded: August 2019

Projected design completion: March 2021

Budget: $30.7 million (construction only)

Status: 30% design

Benefits Accessibility: Raised platforms, new elevators, and accessible bathrooms

Raised platforms, new elevators, and accessible bathrooms Customer experience: Improved wayfinding and lighting Learn more about Symphony Station Accessibility Improvements

Hynes Station Accessibility Improvements As part of a mixed-use development at Parcel 13, Hynes Station will be upgraded for accessibility, safety, and customer experience.

Design contract awarded: Expected spring 2020

Projected completion: Fall 2025

Budget: $45.7 million (design and construction)

Status: Conceptual design

Benefits Accessibility: Raised platforms, new elevators and escalators

Raised platforms, new elevators and escalators Customer experience: Modernization of the station and new wayfinding and lighting Learn more about Hynes Station Accessibility Improvements

Solar-Powered E Ink Signs 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

2017 Projected completion: June 2021

June 2021 Budget: $1.5 million

$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 Track and Intersection Upgrades (2020) As part of Building a Better T 2020, we’re accelerating track work and intersection upgrades across the Green Line. We’ll replace 10.8 miles of track (24% of the Green Line) and upgrade 14 intersections (26% of Green Line). Benefits Safety and Resiliency: Improved safety by replacing track (much of which is over 30 years old)

Improved safety by replacing track (much of which is over 30 years old) Addressing Demand: Reduced travel times by eliminating speed restrictions across Green Line to save riders 4 minutes on their trips

Reduced travel times by eliminating speed restrictions across Green Line to save riders 4 minutes on their trips Customer Experience: Safer pedestrian, vehicle, and bicycle crossings Learn more about Green Line track and intersection upgrades in 2020

Green Line Intersection Upgrades (2019) 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

March 2019 Projected completion: Substantial completion November 2019; final completion April 2020

Substantial completion November 2019; final completion April 2020 Budget: $21,000,001

$21,000,001 Status: 100% construction complete

Benefits Accessibility: New pedestrian pathways at 18 stations

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

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 Green Line intersection upgrades in 2019

D Branch Track and Signal Replacement Note: Starting on Saturday, June 6, Green Line D Branch service will be replaced with shuttle buses between Riverside and Kenmore for two 9-day periods: June 6-14 and June 20-28. These shutdowns will allow us to get track and signal work back on schedule after being impacted by several COVID-19-related postponements. See Green Line D service changes 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

June 2018 Budget: $101,600,453

$101,600,453 Status: 72% complete

Benefits Service Delivery: Speed restrictions lifted on some sections of the Green Line for faster service

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

Brookline Hills Station Accessibility Improvements Brookline Hills Station is being renovated as part of the Town of Brookline’s High School Expansion project. These upgrades will improve accessibility, safety, and customer experience at the station. Timeline: September 2019 – Fall 2021

September 2019 – Fall 2021 Status: 100% design; in construction Benefits Accessibility: Raised platforms, accessible crosswalks and pathways, and a new pickup/dropoff location for The RIDE

Raised platforms, accessible crosswalks and pathways, and a new pickup/dropoff location for The RIDE Customer experience: New canopies, seating, lighting, and wayfinding Learn more about Brookline Hills Station Accessibility Improvements

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

Contract awarded: March 2018

March 2018 Projected completion: Fall 2020

Fall 2020 Budget: $22,187,285

$22,187,285 Status: 75% 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 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

December 2019 Projected completion: July 2021

July 2021 Budget: $61.8 million (construction only)

$61.8 million (construction only) Status: 28% construction complete