MARC Train
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MARC is a commuter rail system in the Washington–Baltimore area. MARC is administered by the Maryland Transit Administration (MTA) and operated under contract by Alstom and Amtrak on track owned by CSX Transportation (CSXT) and Amtrak. In 2023, the system had a ridership of 3,860,600, or about 12,400 per weekday as of the fourth quarter of 2023, less than pre-COVID-19 pandemic weekday ridership of 40,000.
A MARC HHP-8 leads an express train into Odenton station in Odenton, Maryland
A MARC EMD F9PH leads a service through Point of Rocks in 1987
A Baltimore and Ohio Railroad train near the Capital Beltway in 1970, running on what is now the Camden Line
A Penn Central train near the Beltway in 1970, running on what is now the Penn Line
Northeast Corridor
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The Northeast Corridor (NEC) is an electrified railroad line in the Northeast megalopolis of the United States. Owned primarily by Amtrak, it runs from Boston in the north to Washington, D.C. in the south, with major stops in Providence, New Haven, Stamford, New York City, Newark, Trenton, Philadelphia, Wilmington, and Baltimore. The NEC closely parallels Interstate 95 for most of its length. Carrying more than 2,200 trains a day, it is the busiest passenger rail line in the United States by ridership and by service frequency.
Amtrak Acela near Old Saybrook, Connecticut
"K" Tower, north of Washington Union Station, is the only remaining interlocking tower on the Northeast Corridor south of Philadelphia
Pennsylvania Railroad's Congressional west of the North River Tunnels on its way to Washington, D.C.
Northeast Corridor Improvement Project track work in April 1979