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[citation needed] (See MBTA History and MBTA Future plans sections.) Streetcar congestion in downtown Boston led to the creation of underground subways and elevated rail, the former in 1897 and the latter in 1901. The Tremont Street subway was the first rapid transit tunnel in the United States and had a 24/7 service. [4]
All MBTA commuter rail service is provided by push-pull trains powered by diesel locomotives (see § Rolling stock). Maximum speed for trains is 79 miles per hour (127 km/h), though some lines have lower limits. [18] The entire system is signalled and operates with Positive Train Control using the Advanced Civil Speed Enforcement System.
The Type 10 LRV is a future class of low-floor light rail vehicles, to be manufactured by Construcciones y Auxiliar de Ferrocarriles (CAF) for the MBTA Green Line in Greater Boston, Massachusetts. The Type 10 cars are 54% longer than the existing rolling stock of the Green Line, and will be equipped with new safety and accessibility features.
Uniquely among MBTA rolling stock, Blue Line cars use both third rail power and pantograph current pickup from overhead catenary wires. The overhead pantograph was implemented to avoid third rail icing that frequently occurs in winter.
The historic rolling stock is retained largely because the line, built for 1920s streetcars, would have to be substantially rebuilt to accommodate the heavier modern cars used on the Green Line. [22] In order to clear the line of snow, the MBTA maintains a jet engine-powered snowblower , officially the Portec RMC Hurricane Jet Snow Blower ...
Schematic map of Green Line branches and stations. The Green Line's core is the central subway, a group of tunnels which run through downtown Boston. [10] The Tremont Street subway runs roughly north–south through downtown, with stations at Boylston, Park Street, Government Center, Haymarket, and North Station – all with connections to other lines of the MBTA subway system.
In 1973, the MBTA bought most of its present-day commuter rail trackage from the Boston and Maine Railroad and Penn Central (into which the New York Central Railroad and the New York, New Haven and Hartford Railroad had merged). It also purchased rolling stock at this time.
The Orange 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 on the surface from Oak Grove station in Malden, Massachusetts through Malden and Medford, paralleling the Haverhill Line, then crosses the Mystic River on a bridge into Somerville, then into Charlestown.