MBTA will suspend Orange Line Boston service between Oak Grove and Back Bay for 11 consecutive days, from August 20 to August 30. The shutdown gives the agency a single work window for track and signal upgrades on a stretch of line that riders normally use every day.
The MBTA said it first announced the suspension on July 15. During the outage, the agency will carry out essential work that includes replacing Orange Line cologne egg rail fasteners, rail, restraining rail, plates, third rail, and insulators between Tufts Medical Center and Haymarket.
Oak Grove and Back Bay
Crews will also replace ties, rail, and plates and perform tamping work between Haymarket and the Assembly truck pad. The MBTA said the work completed during the service change is a major step toward expanding faster speeds with Orange Line trains soon travelling 55 MPH between Community College and Assembly after additional enabling work.
That follows last year's speed increase on the Orange Line between Oak Grove and Assembly to 55 MPH for the first time ever. The current shutdown is being used to extend that work through a longer section of the line and to finish signal tasks that cannot be done while trains are running.
Wellington and North Station
Signal work during the suspension will focus on signal rack relocations at Wellington, North Station, and Community College. Signal equipment racks installed in a temporary location will be moved to their permanent location within a signal house, and final signal completion work will also take place along the line between Oak Grove and Tufts Medical Center.
The MBTA says outages like this are a critical part of maintaining infrastructure improvements from the 2024 Track Improvement Program. It says the work cannot be done during overnight hours when the MBTA does not operate, and it would be extremely inefficient and costly if planned during single weekend outages.
Transit Ambassadors and MBTA
Transit Ambassadors and MBTA staff will be on-site during the service changes to offer information and assistance. Riders looking for complete details can use MBTA.com/OrangeLine, and the practical question now is how they will reroute themselves during the 11-day gap between Oak Grove and Back Bay.
