The Green Line is a light rail system run by the Massachusetts Bay Transportation Authority (MBTA) in the Boston, Massachusetts, metropolitan area. It is the oldest MBTA subway line, and with tunnel sections dating from 1897, the oldest subway in North America. It runs underground through downtown Boston, and on the surface into inner suburbs via six branches on radial boulevards and grade-separated alignments. With an average daily weekday ridership of 137,700 in 2019, it is the third most heavily used light rail system in the country. The line was assigned the green color in 1967 during a systemwide rebranding because several branches pass through sections of the Emerald Necklace of Boston.
The Massachusetts Bay Transportation Authority (MBTA) system is mostly but not fully accessible. Like most American mass transit systems, much of the MBTA subway and commuter rail were built before wheelchair access became a requirement under the Americans with Disabilities Act of 1990. The MBTA has renovated most stations to be compliant with the ADA, and all stations built since 1990 are accessible. The MBTA also has a paratransit program, The Ride, which provides accessible vehicles to transport passengers who cannot use the fixed-route system.
Porter station is a Massachusetts Bay Transportation Authority (MBTA) transit station in Cambridge, Massachusetts. It serves the Red Line rapid transit line, the MBTA Commuter Rail Fitchburg Line, and several MBTA bus lines. Located at Porter Square at the intersection of Massachusetts and Somerville Avenues, the station provides rapid transit access to northern Cambridge and the western portions of Somerville. Porter is 14 minutes from Park Street on the Red Line, and about 10 minutes from North Station on commuter rail trains. Several local MBTA bus routes also stop at the station.
Central station is a Massachusetts Bay Transportation Authority (MBTA) rapid transit station in Cambridge, Massachusetts. It serves the Red Line and has a street-level terminal for the MBTA bus system. It is located at the intersection of Massachusetts Avenue with Western Avenue, Prospect Street, and Magazine Street at Central Square.
Downtown Crossing station is an underground Massachusetts Bay Transportation Authority (MBTA) rapid transit station located in the Downtown Crossing retail district in the downtown core of Boston, Massachusetts. It is served by the Orange Line and Red Line, and is one of four "hub stations" on the MBTA subway system. Downtown Crossing is also a major bus transfer location serving 13 MBTA bus routes, including one Silver Line route. It is the second busiest subway station in the MBTA network, with an average of 24,074 entries per weekday in FY2019.
Coolidge Corner is a light rail stop on the MBTA Green Line C branch, located at the intersection of Beacon Street and Harvard Street in the Coolidge Corner neighborhood of Brookline, Massachusetts. With 3,440 daily boardings by a 2011 count, it had more than twice the ridership of any other surface station on the branch.
The B branch, also called the Commonwealth Avenue branch or Boston College branch, is a branch of the MBTA Green Line light rail system which operates on Commonwealth Avenue west of downtown Boston, Massachusetts. One of four branches of the Green Line, the B branch runs from Boston College station down the median of Commonwealth Avenue to Blandford Street. There, it enters Blandford Street portal into Kenmore station, where it merges with the C and D branches. The combined services run into the Boylston Street subway and Tremont Street subway to downtown Boston. B branch service has terminated at Government Center since October 2021. Unlike the other branches, the B branch runs solely through the city limits of Boston. The Green Line Rivalry between Boston College and Boston University is named in reference to the B branch, which runs to both universities.
Museum of Fine Arts is a surface-level light rail stop on the MBTA Green Line E branch, located the median of Huntington Avenue in Boston, Massachusetts, between Museum Road and Ruggles Street. The station is named after the adjacent Museum of Fine Arts, although it also provides access to Northeastern University, Wentworth Institute of Technology, and the Isabella Stewart Gardner Museum. Museum of Fine Arts station is accessible.
Fenway station is a light rail stop on the MBTA Green Line D branch, located under Park Drive near the Riverway in the Fenway–Kenmore neighborhood of Boston, Massachusetts. It opened along with the rest of the D branch on July 4, 1959, when trolleys replaced Highland branch commuter rail service. The station is fully accessible from Park Drive via the Landmark Center parking lot, as well as from Miner Street.
Cleveland Circle is a surface light rail station on the MBTA Green Line C branch, located in the Brighton neighborhood of Boston, at Cleveland Circle. Cleveland Circle station is handicapped accessible, with raised platforms to accommodate low-floor trams.
St. Mary's Street station is a surface light rail stop on the MBTA Green Line C branch, located just west of the intersection of Beacon Street and Park Drive in the northeastern tip of Brookline, Massachusetts. Like all surface stops on the line, St Mary's Street consists of two side platforms serving two tracks. The station is accessible.
Newton Centre station is a light rail station on the MBTA Green Line D branch, located in the Newton Centre village of Newton, Massachusetts. A former commuter rail station, it was converted for light rail use and reopened on July 4, 1959, along with the rest of the line. The 1891-built station and express office are part of the Newton Railroad Stations Historic District, which was placed on the National Register of Historic Places in 1976.
Washington Square is a surface light rail stop on the MBTA Green Line C branch, located in the median of Beacon Street in the Washington Square neighborhood of Brookline, Massachusetts. Washington Square is the 4th-busiest surface stop on the line, with 1,091 daily boardings by a 2011 count. The station has two side platforms serving two tracks.
Brookline Hills station is a light rail station on the Massachusetts Bay Transportation Authority (MBTA) Green Line D branch in the Brookline Hills neighborhood of Brookline, Massachusetts. The station has two side platforms serving the line's two tracks. It was closed from April 2021 to January 2022 as part of adjacent construction on a Brookline High School building, which included renovations to make the station accessible.
Valley Road station is a light rail station in Milton, Massachusetts. It serves the MBTA's Ashmont–Mattapan High-Speed Line, a branch of the Red Line. The station is located off Eliot Street near Valley Road and consists of two side platforms that serve the lines's two tracks. Valley Road is the only station on the Line that is not accessible.
Babcock Street station is a light rail stop on the Massachusetts Bay Transportation Authority (MBTA) Green Line B branch, located in the median of Commonwealth Avenue in the west part of the Boston University campus. The accessible station has two side platforms serving the line's two tracks, with access at Babcock Street and Pleasant Street.
Packards Corner station is a light rail stop on the MBTA's Green Line B branch located at Packard's Corner—the intersection of Commonwealth Avenue and Brighton Avenue—in Allston, Boston, Massachusetts. The station is located in a median between the westbound travel lanes and frontage road of Commonwealth Avenue.
Harvard Avenue station is a light rail station on the MBTA Green Line B branch, located in the Allston neighborhood of Boston, Massachusetts. The station is located on the west side of Commonwealth Avenue at Harvard Avenue, in a residential and commercial district. The station consists of two side platforms, located on opposite sides of Harvard Avenue, which serve the B branch's two tracks. The station is fully accessible. Harvard Avenue is the second-busiest surface stop on the Green Line surface branches, with an average of 4,077 boardings on weekdays.
Amory Street station is a light rail stop on the Massachusetts Bay Transportation Authority (MBTA) Green Line B branch, located in the median of Commonwealth Avenue in the west part of the Boston University campus. The accessible station has two side platforms serving the line's two tracks, with access at Amory Street and St. Paul Street.
Boston University Central station is a surface-level light rail station on the MBTA Green Line B branch, located the center median of Commonwealth Avenue west of St. Marys Street in Boston, Massachusetts, surrounded by the Boston University campus. It consists of two side platforms, which serve the B branch's two tracks. The station is accessible, with raised platforms to allow level boarding onto low-floor trams and a high platform on the inbound side to serve high-floor light rail vehicles.
MBTA bus: 65 
