The Green Line is a semi-metro 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.
Longwood Medical Area station is a light rail stop on the MBTA Green Line E branch, located in the Mission Hill neighborhood of Boston, Massachusetts. It is named for the adjacent Longwood Medical Area.
Boston College station is a light rail station on the MBTA Green Line B branch. It is located at St. Ignatius Square on the Boston College campus near the intersection of Commonwealth Avenue and Lake Street, on the border between the Brighton neighborhood of Boston and the Chestnut Hill neighborhood of Newton, Massachusetts. Originally opened in 1896, it has been the terminus of the Commonwealth Avenue line since 1900. The current station is planned to be replaced by a new station located in the median of Commonwealth Avenue just east of Lake Street.
Reservoir station is a light rail station on the MBTA Green Line D branch, located in Brookline, Massachusetts, adjacent to the Cleveland Circle area of Brighton. The station is adjacent to Reservoir Yard and Carhouse, with the Cleveland Circle terminus of the C branch just a block away. With a daily ridership of 3,395, Reservoir is the second-busiest surface stop on the D branch.
Heath Street station is a Massachusetts Bay Transportation Authority (MBTA) Green Line light rail station in Boston, Massachusetts. It is the southwestern terminus of the Green Line E branch. It is located at the intersection of South Huntington Avenue and Heath Street on the border between the Mission Hill and Jamaica Plain neighborhoods.
Coolidge Corner station 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 E branch is a light rail line in Boston, Cambridge, Medford, and Somerville, Massachusetts, operating as part of the Massachusetts Bay Transportation Authority (MBTA) Green Line. The line runs in mixed traffic on South Huntington Avenue and Huntington Avenue between Heath Street and Brigham Circle, in the median of Huntington Avenue to Northeastern University, then into the Huntington Avenue subway. The line merges into the Boylston Street subway just west of Copley, running to North Station via the Tremont Street subway. It then follows the Lechmere Viaduct to Lechmere, then the Medford Branch to Medford/Tufts. As of February 2023, service operates on eight-minute headways at weekday peak hours and eight to nine-minute headways at other times, using 13 to 17 trains.
The C branch, also called the Beacon Street Line or Cleveland Circle Line, is one of four branches of the Massachusetts Bay Transportation Authority's Green Line light rail system in the Boston, Massachusetts metropolitan area. The line begins at Cleveland Circle in the Brighton neighborhood of Boston and runs on the surface through Brookline along the median of Beacon Street. Reentering Boston, the line goes underground through the St. Mary's Street incline and joins the B and D branches at Kenmore. Trains run through the Boylston Street subway to Copley where the E branch joins, then continue through the Tremont Street subway to downtown Boston. The C branch has terminated at Government Center station since October 2021.
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.
The Green Line D branch is a light rail line in Boston, Brookline, Cambridge, Newton, and Somerville, Massachusetts, operating as part of the Massachusetts Bay Transportation Authority (MBTA) Green Line. The line runs on a grade separated surface right-of-way for 9 miles (14 km) from Riverside station to Fenway station. The line merges into the C branch tunnel west of Kenmore, then follows the Boylston Street subway and Tremont Street subway to North Station. It is the longest and busiest of the four Green Line branches. As of February 2023, service operates on 8 to 9-minute headways at weekday peak hours and 8 to 11-minute headways at other times, using 13 to 19 trains.
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. Named after the Fenway parkway rather than Fenway Park, it is further from the stadium than Kenmore, though still used during events.
Back of the Hill station is a surface stop on the light rail MBTA Green Line E branch, located in the Mission Hill neighborhood of Boston, Massachusetts. It is named after, and primarily serves, the adjacent Back of the Hill apartment complex, a Section 8 development for elderly and disabled residents. Back of the Hill is located on the street running section of the E branch on South Huntington Avenue. The station has no platforms; passengers wait in bus shelters on the sidewalks and cross a traffic lane to reach Green Line trains.
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 has two side platforms serving two tracks. The station is accessible. With just over 1,500 daily boardings by a 2011 count, St. Mary's Street is the second-busiest stop on the C branch, behind only Coolidge Corner.
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 station 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.
Chestnut Hill Avenue station is a light rail surface stop on the MBTA Green Line B branch, located in the median of Commonwealth Avenue just east of Chestnut Hill Avenue in the Brighton neighborhood of Boston, Massachusetts. Chestnut Hill Avenue has two low-level platforms, serving the B branch's two tracks; the stop is not accessible.
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.
Washington Street station is a surface stop on the Massachusetts Bay Transportation Authority (MBTA)'s Green Line B branch, located in Brighton, Boston. The station is located in the median of Commonwealth Avenue northeast of Washington Street. Washington Street station consists of two side platforms, which serve the B branch's two tracks. The station is fully accessible.
MBTA bus (at Reservoir): 51, 86 
