than that of the E branch. The D branch was temporarily extended to North Station on October 24, 2021, as part of changes in preparation for the opening of the extension. The Union Square Branch opened on March 21, 2022. It was initially served by the E branch rather than the D branch. The western portion of the E branch was closed from August 6–20, 2022, for track work; during that time, Union Square was served by C branch trains plus Reservoir short turns from the D branch. All service was cut back to Government Center from August 22 to September 18, 2022, to allow for final integration of the Medford Branch and other work. Upon reopening, most D branch service (plus E branch service) began running to Union Square, though some peak hour trains short turned at Government Center. E branch trains began non-revenue test service to Medford/Tufts on November 1, 2022, leaving only the D branch serving Union Square. Station listing References External links MBTA – Green Line D Green Line (MBTA) Rail infrastructure in Massachusetts Railway lines opened in 1959 1959 establishments in Massachusetts