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Red Line (MBTA)
The Red Line is a rapid transit line operated by the Massachusetts Bay Transportation Authority (MBTA) as part of the MBTA subway system. The line runs south and east underground from Alewife station in North Cambridge through Somerville and Cambridge, surfacing to cross the Longfellow Bridge then returning to tunnels under Downtown Boston. It continues underground through South Boston, splitting into two branches on the surface at JFK/UMass station. The Ashmont branch runs southwest through Dorchester to Ashmont station, where the connecting light rail Mattapan Line (shown as part of the Red Line on maps, but operated separately) continues to Mattapan station. The Braintree branch runs southeast through Quincy and Braintree to Braintree station.
The Red Line operates during normal MBTA service hours (all times except late nights) with six-car trains. The 218-car active fleet consists of three orders of cars built in 1969–70, 1987–89, and 1993–94. A 252-car order from CRRC is being built from 2019 to 2024. The Red Line is fully grade-separated; trains are driven by operators with automatic train control for safety. Cabot Yard in South Boston is used for heavy maintenance and storage; yards at Alewife, Ashmont, and Braintree are also used for storage. All 22 Red Line stations are fully accessible. Averaging 119,000 weekday passengers in 2023, the Red Line has the highest ridership of the MBTA subway lines.
The Boston Elevated Railway opened its Cambridge tunnel between Harvard and Park Street in 1912. It was extended south as the Dorchester Tunnel to Washington (now Downtown Crossing) in 1915, South Station in 1916, Broadway in 1917, and Andrew in 1918. The Dorchester extension added three stops to Fields Corner in 1927 and two more stops to Ashmont in 1928. Charles (now Charles/MGH) was added as an infill station in 1932. The newly formed MBTA assigned colors to its subway lines in 1965, with the Cambridge–Dorchester line becoming the Red Line. The MBTA added the three-station South Shore Line to Quincy Center in 1971; it was extended to Braintree in 1980, with Quincy Adams added as an infill in 1983. The Red Line Northwest Extension, originally planned to run to Arlington Heights or Route 128, opened to Davis in 1984 and Alewife in 1985.
What is now the Red Line was the last of the four original Boston subway lines to opened. The Tremont Street subway (now part of Green Line) opened in 1897, the Main Line Elevated (later part of the Orange Line) opened in 1901, and the East Boston Tunnel (now part of the Blue Line) opened in 1904.
Construction of the Cambridge Tunnel (also called Cambridge Subway), connecting Harvard Square to Boston, was delayed by a dispute over the number of intermediate stations to be built along the new line. Cambridge residents, led by Mayor Wardwell, wanted at least five stations built along the line, while suburbanites interested in faster through travel argued for only a single intermediate station, at Central Square. The contending groups finally compromised on two intermediate stations, at Central and Kendall Squares, allowing construction to start in 1909.
The section from Harvard (and new maintenance facilities at Eliot Yard) to Park Street was opened by the Boston Elevated Railway (BERy) on March 23, 1912. At Harvard, a prepayment station provided easy transfer to streetcars routed through what is now the Harvard bus tunnel. From Harvard, the Cambridge tunnel traveled beneath Massachusetts Avenue to Central Square station. It then continued under Mass. Ave until Main Street, which it followed to reach Kendall station. The underground line then rose onto the Longfellow Bridge, using a central right-of-way which had been reserved during the bridge's 1900–1906 construction. On the Boston side, the line briefly became an elevated railway, as vehicle lanes descended beneath it to Charles Circle; the tracks then immediately entered a tunnel beneath Beacon Hill, leading to new lower-level platforms at Park Street Under. Charles Station (now Charles/MGH) was added above the traffic circle in 1932.
Work soon began on extension to the south. The Dorchester Tunnel to Washington Street and South Station Under opened on April 4, 1915 and December 3, 1916, with transfers to the Washington Street Tunnel and Atlantic Avenue Elevated, respectively. Further extensions opened to Broadway on December 15, 1917 and Andrew on June 29, 1918, both prepayment stations for streetcar transfer. The Broadway station included an upper level with its own tunnel for streetcars, which was soon abandoned in 1919 due to most lines being truncated to Andrew. The upper level at Broadway was later incorporated into the mezzanine.
Next came the Dorchester extension (now the Ashmont Branch), following a rail right-of-way created in 1870 by the Shawmut Branch Railroad. In 1872, the right-of-way was acquired by the Old Colony Railroad to connect their main line at Harrison Square with the Dorchester and Milton Branch Railroad, running from the Old Colony at Neponset, west to what is now Mattapan station. The New York, New Haven and Hartford Railroad succeeded the Old Colony in operating the branch, but passenger service ceased on September 4, 1926, in anticipation of the construction of the BERy's Dorchester extension.
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Red Line (MBTA)
The Red Line is a rapid transit line operated by the Massachusetts Bay Transportation Authority (MBTA) as part of the MBTA subway system. The line runs south and east underground from Alewife station in North Cambridge through Somerville and Cambridge, surfacing to cross the Longfellow Bridge then returning to tunnels under Downtown Boston. It continues underground through South Boston, splitting into two branches on the surface at JFK/UMass station. The Ashmont branch runs southwest through Dorchester to Ashmont station, where the connecting light rail Mattapan Line (shown as part of the Red Line on maps, but operated separately) continues to Mattapan station. The Braintree branch runs southeast through Quincy and Braintree to Braintree station.
The Red Line operates during normal MBTA service hours (all times except late nights) with six-car trains. The 218-car active fleet consists of three orders of cars built in 1969–70, 1987–89, and 1993–94. A 252-car order from CRRC is being built from 2019 to 2024. The Red Line is fully grade-separated; trains are driven by operators with automatic train control for safety. Cabot Yard in South Boston is used for heavy maintenance and storage; yards at Alewife, Ashmont, and Braintree are also used for storage. All 22 Red Line stations are fully accessible. Averaging 119,000 weekday passengers in 2023, the Red Line has the highest ridership of the MBTA subway lines.
The Boston Elevated Railway opened its Cambridge tunnel between Harvard and Park Street in 1912. It was extended south as the Dorchester Tunnel to Washington (now Downtown Crossing) in 1915, South Station in 1916, Broadway in 1917, and Andrew in 1918. The Dorchester extension added three stops to Fields Corner in 1927 and two more stops to Ashmont in 1928. Charles (now Charles/MGH) was added as an infill station in 1932. The newly formed MBTA assigned colors to its subway lines in 1965, with the Cambridge–Dorchester line becoming the Red Line. The MBTA added the three-station South Shore Line to Quincy Center in 1971; it was extended to Braintree in 1980, with Quincy Adams added as an infill in 1983. The Red Line Northwest Extension, originally planned to run to Arlington Heights or Route 128, opened to Davis in 1984 and Alewife in 1985.
What is now the Red Line was the last of the four original Boston subway lines to opened. The Tremont Street subway (now part of Green Line) opened in 1897, the Main Line Elevated (later part of the Orange Line) opened in 1901, and the East Boston Tunnel (now part of the Blue Line) opened in 1904.
Construction of the Cambridge Tunnel (also called Cambridge Subway), connecting Harvard Square to Boston, was delayed by a dispute over the number of intermediate stations to be built along the new line. Cambridge residents, led by Mayor Wardwell, wanted at least five stations built along the line, while suburbanites interested in faster through travel argued for only a single intermediate station, at Central Square. The contending groups finally compromised on two intermediate stations, at Central and Kendall Squares, allowing construction to start in 1909.
The section from Harvard (and new maintenance facilities at Eliot Yard) to Park Street was opened by the Boston Elevated Railway (BERy) on March 23, 1912. At Harvard, a prepayment station provided easy transfer to streetcars routed through what is now the Harvard bus tunnel. From Harvard, the Cambridge tunnel traveled beneath Massachusetts Avenue to Central Square station. It then continued under Mass. Ave until Main Street, which it followed to reach Kendall station. The underground line then rose onto the Longfellow Bridge, using a central right-of-way which had been reserved during the bridge's 1900–1906 construction. On the Boston side, the line briefly became an elevated railway, as vehicle lanes descended beneath it to Charles Circle; the tracks then immediately entered a tunnel beneath Beacon Hill, leading to new lower-level platforms at Park Street Under. Charles Station (now Charles/MGH) was added above the traffic circle in 1932.
Work soon began on extension to the south. The Dorchester Tunnel to Washington Street and South Station Under opened on April 4, 1915 and December 3, 1916, with transfers to the Washington Street Tunnel and Atlantic Avenue Elevated, respectively. Further extensions opened to Broadway on December 15, 1917 and Andrew on June 29, 1918, both prepayment stations for streetcar transfer. The Broadway station included an upper level with its own tunnel for streetcars, which was soon abandoned in 1919 due to most lines being truncated to Andrew. The upper level at Broadway was later incorporated into the mezzanine.
Next came the Dorchester extension (now the Ashmont Branch), following a rail right-of-way created in 1870 by the Shawmut Branch Railroad. In 1872, the right-of-way was acquired by the Old Colony Railroad to connect their main line at Harrison Square with the Dorchester and Milton Branch Railroad, running from the Old Colony at Neponset, west to what is now Mattapan station. The New York, New Haven and Hartford Railroad succeeded the Old Colony in operating the branch, but passenger service ceased on September 4, 1926, in anticipation of the construction of the BERy's Dorchester extension.