The Silver Line is a system of bus routes in Boston and Chelsea, Massachusetts, operated by the Massachusetts Bay Transportation Authority (MBTA). It is operated as part of the MBTA bus system, but branded as bus rapid transit (BRT) as part of the MBTA subway system. Six routes are operated as part of two disconnected corridors. As of 2019, weekday ridership on the Silver Line was 39,000.
South Station, officially The Governor Michael S. Dukakis Transportation Center at South Station, is the largest railroad station and intercity bus terminal in Greater Boston and New England's second-largest transportation center after Logan International Airport. Located at the intersection of Atlantic Avenue and Summer Street in Dewey Square, Boston, Massachusetts, the historic station building was constructed in 1899 to replace the downtown terminals of several railroads. Today, it serves as a major intermodal domestic transportation hub, with service to the Greater Boston region and the Northeastern and Midwestern United States. It is used by thousands of commuter rail and intercity rail passengers daily. Connections to the rapid transit Red Line and bus rapid transit Silver Line are made through the adjacent subway station.
Airport station is a rapid transit station in Boston, Massachusetts. It serves the MBTA Blue Line and the SL3 branch of the Silver Line. It is located in East Boston under the interchange between Interstate 90 and Massachusetts Route 1A. The station provides one of two mass transit connections to the nearby Logan International Airport, as well as serving local residents in East Boston. Shuttle buses connect the station with the airport terminals and other facilities.
The Massachusetts Bay Transportation Authority (MBTA) operates 152 bus routes in the Greater Boston area. The MBTA has a policy objective to provide transit service within walking distance for all residents living in areas with population densities greater than 5,000 inhabitants per square mile (1,900/km2) within the MBTA's service district. Much of this service is provided by bus. In 2023, the system had a ridership of 91,459,700, or about 310,700 per weekday as of the first quarter of 2024.
Key bus routes of the Massachusetts Bay Transportation Authority (MBTA) system are 15 routes that have high ridership and higher frequency standards than other bus lines, according to the 2004 MBTA Service Policy. Together, they account for roughly 40% of the MBTA's total bus ridership. These key bus routes ensure basic geographic coverage with frequent service in the densest areas of Boston, and connect to other MBTA services to give access to other areas throughout the region.
Nubian station is a ground-level Massachusetts Bay Transportation Authority (MBTA) bus station located in Nubian Square in the Roxbury neighborhood of Boston, Massachusetts, United States. It is a transfer point between MBTA bus routes, including two Silver Line bus rapid transit lines and 14 local routes. Like all MBTA bus stops, Nubian is fully accessible.
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 June 2024, service operates on 6 to 8-minute headways at weekday peak hours and 7 to 13-minute headways at other times, using 13 to 19 trains.
As with many large cities, a large number of Boston-area streetcar lines once existed, and many continued operating into the 1950s. However, only a few now remain, namely the four branches of the Green Line and the Ashmont–Mattapan High-Speed Line, with only one running regular service on an undivided street.
Ashmont station is a Massachusetts Bay Transportation Authority (MBTA) intermodal transit station located at Peabody Square in the Dorchester neighborhood of Boston, Massachusetts. It is the southern terminus of the Ashmont branch of the rapid transit Red Line, the northern terminus of the connecting light rail Ashmont–Mattapan High-Speed Line, and a major terminal for MBTA bus service. Ashmont has two side platforms serving the below-grade Red Line and a single side platform on an elevated balloon loop for the Mattapan Line. The station is fully accessible for all modes.
Sullivan Square station is a rapid transit station on the MBTA subway Orange Line, located adjacent to Sullivan Square in the Charlestown neighborhood of Boston, Massachusetts. It is a major transfer point for MBTA bus service, with 12 routes using a two-level busway. The station has two island platforms serving the two active Orange Line tracks plus an unused third track. The Haverhill Line and Newburyport/Rockport Line pass through the station on separate tracks but do not stop.
The Massachusetts Bay Transportation Authority (MBTA) maintains a large public transit system in the Boston, Massachusetts area, and uses various methods to name and number their services for the convenience of users.
World Trade Center station is an underground bus rapid transit station on the MBTA's Silver Line, located south of Congress Street on the South Boston Waterfront. The station is situated between the World Trade Center and the Boston Convention and Exhibition Center; it also serves Commonwealth Pier and nearby residential and commercial development. Like all Silver Line stations, World Trade Center station is accessible.
Broadway station is a subway station in Boston, Massachusetts. It serves the MBTA's Red Line. It is located at the intersection of Dorchester Avenue and Broadway in South Boston. It was opened on December 15, 1917, as part of the Dorchester Extension from Downtown Crossing to Andrew. The station has a single island platform to serve the two tracks.
Silver Line Way station is a surface bus rapid transit station on the Massachusetts Bay Transportation Authority (MBTA) Silver Line, located on Silver Line Way at Pumphouse Road between Massport Haul Road and D Street near the South Boston Waterfront. The station is a block south of the Boston Fish Pier; it also serves the Boston Renaissance Waterfront Hotel and the Leader Bank Pavilion.
Watertown Carhouse is a bus maintenance facility and former streetcar carhouse located in the southern section of Watertown, Massachusetts, across the Charles River from Watertown Square. As Watertown Yard, the site also serves as a bus depot serving local and express routes 52, 57, 59, and 504, with additional connections available at Watertown Square station on the opposite end of the Watertown Bridge.
Bellingham Square station is a Massachusetts Bay Transportation Authority (MBTA) Silver Line bus rapid transit (BRT) station located near Bellingham Square slightly north of downtown Chelsea, Massachusetts. The station has two accessible side platforms for buses on the SL3 route. The Boston and Maine Railroad and predecessor Eastern Railroad served Chelsea station at the same location from the mid-1850s to 1958. The MBTA opened Chelsea station on the Newburyport/Rockport Line in 1985. Prior to its 2010 cancellation, the Urban Ring Project planned for a circumferential BRT line with a stop at Mystic Mall. Planning continued for the Chelsea segment; a Silver Line extension to Mystic Mall was announced in 2013. Construction began in 2015, and SL3 service to the renamed Bellingham Square station began on April 21, 2018. Commuter rail service moved to the newly constructed Chelsea station on November 15, 2021.
Rockport station is an MBTA Commuter Rail station in Rockport, Massachusetts. It is the terminus of the Rockport branch of the Newburyport/Rockport Line. The station complex consists of a single side platform with one revenue track plus 4 layover tracks for parked trains and a short stretch of auxiliary track.
Newton Corner is an MBTA bus transfer point in the Newton Corner neighborhood of Newton, Massachusetts, located on the rotary where Washington Street crosses the Massachusetts Turnpike. The Newton Corner station, known simply as Newton for much of its lifetime, served commuters on the Worcester Line from 1834 to 1959. A streetcar stop, located on the surface streets, served a number of routes beginning in 1863, including the Green Line A branch until 1969. Newton Corner is now a stop and transfer point for MBTA routes 52, 57, 501, 504, 553, 554, 556, and 558, which include express routes to downtown Boston as well as local routes, with stops on the north and south sides of the rotary.
Chelsea station is a Massachusetts Bay Transportation Authority (MBTA) intermodal transit station located adjacent to the Mystic Mall in Chelsea, Massachusetts. It is the terminus of the SL3 route of the MBTA Silver Line bus rapid transit (BRT) network, and is served by the Newburyport/Rockport Line of the MBTA Commuter Rail. The accessible station has a loop with two small platforms for the Silver Line, and two full-length side platforms for commuter rail trains.
MBTA bus: 7, 9, 10, 11 
