The Massachusetts Bay Transportation Authority (MBTA) bus division manages a network of 151 routes throughout the Boston metropolitan region in Massachusetts. Each route offers connections to the MBTA subway system, the Commuter Rail, or other MBTA bus lines. Many of these services trace their origins to historic streetcar lines operated by the Boston Elevated Railway and suburban operators such as the Eastern Massachusetts Street Railway and Middlesex and Boston Street Railway. Of the total routes, 147 are directly operated by the MBTA, while four are managed by private contractors. Additionally, four suburban routes receive partial financial support from the MBTA.
The majority of buses require a local fare, which is $1.70 for a one-way trip as of 2024. The Silver Line routes serving the waterfront (SL1, SL2, SL3, SLW) apply the standard subway fare of $2.40. Express bus services feature both local and express fare segments priced at $1.70 and $4.25 respectively for 2024.
Bus operations were interrupted during the COVID-19 pandemic but had largely returned to their previous service levels by 2021, although some routes remain inactive. Since 2018, the MBTA has been undertaking a comprehensive redesign of its bus network, with an anticipated completion date in 2028. The first phase of this redesign was implemented in December 2024.
Silver Line
The Silver Line is a bus rapid transit (BRT) system consisting of six routes and is promoted as a rapid transit option. It features two distinct segments: the Waterfront service (SL1, SL2, SL3, SLW), which travels through the South Boston Transitway tunnel, and the Washington Street service (SL4, SL5), which operates on surface streets. Waterfront routes charge fares equivalent to the subway system, whereas Washington Street routes maintain standard bus fare levels. All Silver Line vehicles are articulated buses; those serving the Waterfront are hybrid models equipped with extended battery capacity to enable electric operation within tunnels.
The SL5 route commenced service in 2002 as a replacement for the Washington Street Elevated line. The Shuttle began operating in 2004, followed by SL2 and the original SL3 also in 2004, with SL1 launching in 2005 utilizing dual-mode buses. The SL4 route started in 2009 as a substitute for a canceled Phase III tunnel project. In 2018, a new SL3 route connecting Chelsea was introduced.
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From a page move: This is a redirect from a page that has been moved (renamed). This page was kept as a redirect to avoid breaking links, both internal and external, that may have been made to the old page name.
When appropriate, protection levels are automatically sensed, described and categorized.
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From a page move: This is a redirect from a page that has been moved (renamed). This page was kept as a redirect to avoid breaking links, both internal and external, that may have been made to the old page name.
When appropriate, protection levels are automatically sensed, described and categorized.
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When appropriate, protection levels are automatically sensed, described and categorized.
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When appropriate, protection levels are automatically sensed, described and categorized.
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When appropriate, protection levels are automatically sensed, described and categorized.
The MBTA operates two crosstown (CT) routes that provide limited-stop service connecting key subway stations and major bus transfer hubs. Initially launched with three routes in 1994, route CT1 was merged into route 1 in 2019.
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These routes cover almost all local transit within the metropolitan center, many tracing their origins back to the Boston Elevated Railway streetcar lines. Arranged approximately in a clockwise sequence from the southeast to the northeast, this system has largely preserved its original structure since the BERy period, notwithstanding some consolidations and expansions during the Metropolitan Transit Authority and MBTA eras.
Seven routes—, , , , , , and —serve western suburban communities including Bedford, Waltham, Lexington, and Needham. These lines originated from the 1972 acquisition of Middlesex and Boston Street Railway services.
In 2004, fourteen routes—such as , , , , , , , , , , , , , and —were identified as key bus routes due to their high ridership. These critical lines provide frequent service that complements subway operations in the most densely populated urban neighborhoods. Beginning in 2024, the MBTA’s Bus Network Redesign will phase out the "key bus route" label in favor of a more comprehensive frequent service network. Notably, routes 28 and 39 operate with 60-foot articulated buses.
Four early morning round trips (191–194) link outlying stations to over multiple local routes. Originally intended primarily for station agents, these runs are accessible to all passengers.
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When appropriate, protection levels are automatically sensed, described and categorized.
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From a page move: This is a redirect from a page that has been moved (renamed). This page was kept as a redirect to avoid breaking links, both internal and external, that may have been made to the old page name.
When appropriate, protection levels are automatically sensed, described and categorized.
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Routes numbered 131 through 137 serve the Melrose area and originate from former Eastern Massachusetts Street Railway lines that became part of the MBTA in 1968. The discontinued route 136 and route 137 briefly extended service to Lowell and Lawrence when operated by the MBTA. Route 132 was incorporated into the system following its acquisition from Service Bus Lines in 1975.
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When appropriate, protection levels are automatically sensed, described and categorized.
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From a page move: This is a redirect from a page that has been moved (renamed). This page was kept as a redirect to avoid breaking links, both internal and external, that may have been made to the old page name.
When appropriate, protection levels are automatically sensed, described and categorized.
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From a page move: This is a redirect from a page that has been moved (renamed). This page was kept as a redirect to avoid breaking links, both internal and external, that may have been made to the old page name.
When appropriate, protection levels are automatically sensed, described and categorized.
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Route 171 functions as a limited-service substitute for early morning CT3 trips following their reduction from Logan Airport in 2002. Other variants of route 170 were short-term industrial shuttle services.
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Initially formed by the M.T.A. in 1962 from BERy’s 20 belt route services, this loop was renamed in 2005 as routes 201 and 202 to distinguish between loop directions more clearly.
Routes numbered 210 through 245 operate within Quincy and have their origins in the Eastern Massachusetts Street Railway lines that were integrated into the MBTA system in 1968. Following the inauguration of the Red Line’s Braintree Branch between 1971 and the 1980s, these bus lines were adjusted to conclude at rapid transit stations such as .
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From a page move: This is a redirect from a page that has been moved (renamed). This page was kept as a redirect to avoid breaking links, both internal and external, that may have been made to the old page name.
When appropriate, protection levels are automatically sensed, described and categorized.
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From a page move: This is a redirect from a page that has been moved (renamed). This page was kept as a redirect to avoid breaking links, both internal and external, that may have been made to the old page name.
When appropriate, protection levels are automatically sensed, described and categorized.
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From a page move: This is a redirect from a page that has been moved (renamed). This page was kept as a redirect to avoid breaking links, both internal and external, that may have been made to the old page name.
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From a page move: This is a redirect from a page that has been moved (renamed). This page was kept as a redirect to avoid breaking links, both internal and external, that may have been made to the old page name.
When appropriate, protection levels are automatically sensed, described and categorized.
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From a page move: This is a redirect from a page that has been moved (renamed). This page was kept as a redirect to avoid breaking links, both internal and external, that may have been made to the old page name.
When appropriate, protection levels are automatically sensed, described and categorized.
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From a page move: This is a redirect from a page that has been moved (renamed). This page was kept as a redirect to avoid breaking links, both internal and external, that may have been made to the old page name.
When appropriate, protection levels are automatically sensed, described and categorized.
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From a page move: This is a redirect from a page that has been moved (renamed). This page was kept as a redirect to avoid breaking links, both internal and external, that may have been made to the old page name.
When appropriate, protection levels are automatically sensed, described and categorized.
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From a page move: This is a redirect from a page that has been moved (renamed). This page was kept as a redirect to avoid breaking links, both internal and external, that may have been made to the old page name.
When appropriate, protection levels are automatically sensed, described and categorized.
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From a page move: This is a redirect from a page that has been moved (renamed). This page was kept as a redirect to avoid breaking links, both internal and external, that may have been made to the old page name.
When appropriate, protection levels are automatically sensed, described and categorized.
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From a page move: This is a redirect from a page that has been moved (renamed). This page was kept as a redirect to avoid breaking links, both internal and external, that may have been made to the old page name.
When appropriate, protection levels are automatically sensed, described and categorized.
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From a page move: This is a redirect from a page that has been moved (renamed). This page was kept as a redirect to avoid breaking links, both internal and external, that may have been made to the old page name.
When appropriate, protection levels are automatically sensed, described and categorized.
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From a page move: This is a redirect from a page that has been moved (renamed). This page was kept as a redirect to avoid breaking links, both internal and external, that may have been made to the old page name.
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From a page move: This is a redirect from a page that has been moved (renamed). This page was kept as a redirect to avoid breaking links, both internal and external, that may have been made to the old page name.
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Serving the Burlington and Woburn regions, these routes descend from the Lowell–Boston line of the Eastern Massachusetts Street Railway, which was taken over by the MBTA in 1968 and subsequently truncated to Burlington.
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Covering Lynn and other North Shore communities, these routes include former Service Bus Lines operations (routes 411 and 430) acquired in 1975, along with mainly Eastern Massachusetts Street Railway lines absorbed in 1968. Weekend short-turn services, indicated by a W suffix, operate between Haymarket and Wonderland stations.
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These express bus routes provide service between Newton and downtown Boston utilizing the Massachusetts Turnpike (I-90). The MBTA launched the 500 series during the 1960s to take advantage of the newly extended turnpike. The 550 series has its origins in former Middlesex and Boston Street Railway routes terminating at Newton Corner, which were extended into downtown Boston in the 1960s and later integrated into the MBTA system in 1972; however, these routes were truncated back to Newton Corner in 2020.
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When appropriate, protection levels are automatically sensed, described and categorized.
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Several suburban routes beyond the MBTA’s primary service area receive partial funding from the authority and connect with MBTA transit options. The radial commuter routes numbered 712 through 716 were acquired from private companies: Rapid Transit Inc. operates routes 712 and 713, Nantasket Transportation runs route 714, while Hudson Bus Lines manages route 716.
Local circulator services without route numbers are municipal initiatives supported partially by MBTA subsidies. Except for the Beverly Shuttle—which is overseen by the Cape Ann Transportation Authority—all these services are privately contracted.
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From a page move: This is a redirect from a page that has been moved (renamed). This page was kept as a redirect to avoid breaking links, both internal and external, that may have been made to the old page name.
When appropriate, protection levels are automatically sensed, described and categorized.
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From a page move: This is a redirect from a page that has been moved (renamed). This page was kept as a redirect to avoid breaking links, both internal and external, that may have been made to the old page name.
When appropriate, protection levels are automatically sensed, described and categorized.