The MBTA announced that Orange Line and Green Line Union Square service will resume on Monday, September 19, 2022.

The MBTA initiated the 30-day full closure of the Orange Line on August 19 to complete five years of improvements in 30 days and bring track and signal infrastructure into a state of good repair, while also addressing safety actions identified by the Federal Transit Administration (FTA).

Orange Line track replacement work addresses FTA Special Directive 22-4 which mandates that the MBTA take actions related to maintenance of way. In Directive 22-4, the FTA noted that defective track conditions had forced the MBTA to implement slow zones where trains had to operate at restricted speeds. By replacing thousands of feet of rail during the Orange Line closure, the MBTA is eliminating the slow zones, and providing riders with faster and more reliable service.

-via Press Release