E branch (Green Line)

E branch (Green Line). The E branch is a surface-level light rail line of the MBTA's Green Line in Boston, Massachusetts. It primarily operates along a reserved right-of-way in the median of Huntington Avenue, connecting the Longwood Medical and Academic Area and the Mission Hill neighborhood to Downtown Boston. The branch currently terminates at Heath Street in Jamaica Plain, with service continuing through the Green Line tunnel to Lechmere or Medford/Tufts.

History

The line's history originates from the late 19th century with the West End Street Railway, which electrified streetcar routes along Tremont Street and Huntington Avenue. Service was later operated by the Boston Elevated Railway, with the Huntington Avenue subway opening in 1941 to bypass street-level congestion. The modern E branch designation was created in 1967 as part of the MBTA's color-coding of its rail lines. The branch was truncated from its former terminal at Arborway to Heath Street in 1985, a decision that has remained a point of community contention and periodic review. Historical operations also included streetcars to Forest Hills via the Washington Street Elevated.

Route and stations

The E branch begins at Heath Street, traveling northeast along the surface-level median of Huntington Avenue. Key surface stops include Brigham Circle, serving the Brigham and Women's Hospital, and Longwood Medical Area, a major hub for the Harvard Medical School and numerous hospitals. The line enters the Huntington Avenue subway at Northeastern University, adjacent to the school's Centennial Common. It then merges with the Green Line tunnel at Copley, near the Boston Public Library, and proceeds underground through stations like Arlington and Boylston before reaching the central transfer point at Park Street. Trains continue under Government Center to North Station and terminate at either Lechmere in East Cambridge or Medford/Tufts.

Rolling stock

The E branch is served by the MBTA's standard Green Line fleet. Primary vehicles include the Kinki Sharyo Type 7 cars, introduced in the late 1980s, and the low-floor AnsaldoBreda Type 8 cars, which entered service in the early 2000s to improve accessibility. All maintenance for these vehicles is performed at the Southampton Street Yard or the Riverside carhouse. The branch's street-running segment requires compatible light rail equipment capable of operating in both dedicated medians and mixed-traffic environments.

Service and operations

Service operates from early morning until approximately 1:00 AM, with headways ranging from 6 to 12 minutes during peak periods. The E branch shares the central subway with the B, C, and D branches, merging at Copley and Kenmore. Key transfer points include Park Street for the Red Line and Orange Line, and North Station for the Orange Line and Commuter Rail. Due to its surface operation along Huntington Avenue, the branch can be susceptible to traffic delays, which the MBTA attempts to mitigate with signal priority and dedicated lanes.

Future plans

Long-discussed proposals include restoring service beyond Heath Street to the original terminal at Arborway, a project studied by the MBTA and advocated for by groups like the Arborway Committee. The Green Line Extension project, which opened service to Medford/Tufts and Union Square in 2022, integrated the E branch's northern terminus into an expanded network. Other potential improvements involve station accessibility upgrades, fleet replacement with new Green Line vehicles from CRRC, and enhanced traffic signal coordination along Huntington Avenue to improve reliability.

Category:Green Line (MBTA) branches Category:Rail transportation in Boston, Massachusetts Category:Light rail in the United States