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Green Line Track and Intersection Upgrades (2021)

A large construction vehicle moves gravel onto freshly laid track. The track curves around a fence next to a street.

As part of Building a Better T 2020, we accelerated track work and intersection upgrades across the Green Line. We replaced 10.8 miles (24% of the Green Line) of track and upgraded 14 intersections (26% of the Green Line) on the B, C, and E branches. See more details on what we accomplished in 2020 on the B Branch, C Branch, and E Branch.

In 2021, we will again accelerate work on the B Branch—additional track and intersection upgrades will be done alongside work on the B Branch Station Consolidation from April to June. By doing this work simultaneously, we will reduce the need for future B Branch closures.

Building a Better T

As part of our $8 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.

Learn more

Why We're Doing This Work

Much of the Green Line tracks are over 30 years old and have reached the end of their service life. By replacing this track, we’ll be able to lift speed restrictions across the line, saving riders a total of 4 minutes on their trips.

At intersections, we’ll replace uneven pavement with a new, smooth layer and install accessible ramps where needed for improved rider experience, safety, and accessibility.

Service Impacts

As part of accelerated work on the B Branch Station Consolidation, shuttles will replace trains between Washington St and Kenmore all day and night, April 17 – May 9 and May 17 - June 13.

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Work Locations and Schedule

green line B B Green Line B

LocationDates
LocationReplace outdated track between BU Central and Blandford Street and between Babcock Street and Packards CornerDates

April 26 – 30 (6 AM – 6 PM)
April 26 – 30 (9 PM – 5 AM)
May 3 – 7 (6 AM – 6 PM)

LocationUpgrade Cummington Mall intersectionDatesMay 17 – 20 (6 AM – 6 PM)
LocationUpgrade St. Mary's Street intersectionDatesMay 21 – 26 (6 AM – 6 PM)
LocationReplace track from Blandford Street to KenmoreDatesMay 27 – June 13 (6 AM – 6 PM)
LocationGeotechnical survey work between Washington Street and Babcock StreetDatesMay 17 – May 30

Please note that this work schedule is dependent on weather and COVID-19 guidelines and is subject to change without notice. Additional MBTA Departments may perform maintenance work on other areas of the B Branch simultaneously.

Neighborhood Impacts

During this work, there will be single-lane closures on Commonwealth Avenue east and westbound around the work zones listed above. There will also be minor detours for pedestrians and vehicles when intersections are being replaced. We will install signs to indicate vehicle, pedestrian, and bicycle routes.

Contact Information

For all queries and comments related to Green Line Track and Intersection Upgrades (2021), please contact us at GLT@mbta.com.

If you would like to report a noise issue, call the 24/7 hotline at 508-676-3517.

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Building a Better T

As part of our $8 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.

Learn more

Related Projects

Side view of new Green Line car at Riverside (July 2018)

This project is one of many we're working on to ensure twice as many passengers have access to a safer, more comfortable, and more reliable Green Line by 2030.

Learn more about the Green Line Transformation