The Baltimore and Ohio Railroad was the first common carrier railroad and the oldest railroad in the United States. It operated as B&O from 1830 until 1987, when it was merged into the Chessie System; its lines are today controlled by CSX Transportation.
CSX Transportation, known colloquially as simply CSX, is a Class I freight railroad company operating in the Eastern United States and the Canadian provinces of Ontario and Quebec. Operating about 21,000 route miles (34,000 km) of track, it is the leading subsidiary of CSX Corporation, a Fortune 500 company headquartered in Jacksonville, Florida.
Chessie System, Inc. was a holding company that owned the Chesapeake and Ohio Railway (C&O), the Baltimore and Ohio Railroad (B&O), the Western Maryland Railway (WM), and Baltimore and Ohio Chicago Terminal Railroad (B&OCT). Trains operated under the Chessie name from 1973 to 1987.
The Chesapeake and Ohio Railway was a Class I railroad formed in 1869 in Virginia from several smaller Virginia railroads begun in the 19th century. Led by industrialist Collis P. Huntington, it reached from Virginia's capital city of Richmond to the Ohio River by 1873, where the railroad town of Huntington, West Virginia, was named for him.
The Western Maryland Railway was an American Class I railroad (1852–1983) that operated in Maryland, West Virginia, and Pennsylvania. It was primarily a coal hauling and freight railroad, with a small passenger train operation.
The Capital Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. state of Maryland and the District of Columbia. The line runs from near Baltimore, Maryland, southwest to Washington, D.C., along the former Baltimore and Ohio Rail Road (B&O) Washington Branch. The subdivision's Alexandria Extension provides a connection to Virginia and points south.
The Frederick Branch is a railroad line in Frederick County, Maryland. It was built by the Baltimore and Ohio Railroad (B&O) in 1831, and is now owned by the Maryland Department of Transportation (MDOT). The 3.4 mi (5.5 km) branch extends between Frederick Junction – a wye with the Old Main Line Subdivision of CSX Transportation on the west side of the Monocacy River – and its terminus at East Street in downtown Frederick, Maryland. The wye at Frederick Junction was the first example of its kind in the United States and is still in use today.
The Baltimore Belt Line was constructed by the Baltimore and Ohio Railroad (B&O) in the early 1890s to connect the railroad's newly constructed line to Philadelphia and New York City/Jersey City with the rest of the railroad at Baltimore, Maryland. It included the Howard Street Tunnel, the Mount Royal Station for B&O's Royal Blue Line passenger trains, and the first mainline railroad electrification in the United States. CSX Transportation currently operates the line as part of its Baltimore Terminal Subdivision.
The Mountain Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. states of Maryland and West Virginia. The line runs from Cumberland, Maryland, west to Grafton, West Virginia, along the original Baltimore and Ohio Railroad (B&O) main line. It was known as the West End Subdivision until the B&O's absorption into the Chessie System, and included the B&O's original crossing of the Allegheny Mountains. Through CSX traffic to the west from Cumberland now uses the Keystone Subdivision over Sand Patch Grade.
The Hanover Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. states of Maryland and Pennsylvania. The line runs from Baltimore, Maryland, west to Hagerstown, Maryland, along several former Western Maryland Railway (WM) lines. It meets the Baltimore Terminal Subdivision at its east end, and the Lurgan Subdivision heads both north and west from its west end.
The Keystone Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. states of Maryland and Pennsylvania. The line runs from Cumberland, Maryland, west to McKeesport, Pennsylvania, along a former Baltimore and Ohio Railroad (B&O) line. The line includes the well-known Sand Patch Grade over the Allegheny Mountains.
The Philadelphia Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. states of Pennsylvania, Delaware, and Maryland. The line runs from Philadelphia, Pennsylvania, southwest to Baltimore, Maryland, along a former Baltimore and Ohio Railroad (B&O) line.
The Metropolitan Subdivision is a railroad line owned and operated by CSX Transportation in Washington, D.C. and Maryland.The 53-mile line runs from Washington, D.C., northwest to Weverton, Maryland, along the former Metropolitan Branch of the Baltimore and Ohio Railroad.
The CSX Cumberland Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. states of Maryland and West Virginia. The line runs from Brunswick, Maryland, west to Cumberland, Maryland, along the old Baltimore and Ohio Rail Road (B&O) main line. At its east end, the Cumberland Subdivision becomes the Metropolitan Subdivision; at its west end at Cumberland, Maryland it becomes the Cumberland Terminal Subdivision. It meets the Shenandoah Subdivision at Harpers Ferry, West Virginia, and the Lurgan Subdivision in Cherry Run, West Virginia.
The New Castle Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. states of Pennsylvania and Ohio. The line runs from New Castle, Pennsylvania west through Youngstown and Akron to Greenwich, Ohio along a former Baltimore and Ohio Railroad line. Its east end is near Mahoningtown, at the west end of the New Castle Terminal Subdivision. Its west end is at the Willard Terminal Subdivision, just east of the Greenwich Subdivision junction at Greenwich. It junctions with the Newton Falls Subdivision at Newton Falls, Ohio, and the CL&W Subdivision at Sterling, Ohio.
The CL&W Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. state of Ohio. The line runs from a junction with the New Castle Subdivision at Sterling northwest to Lorain along a former Baltimore and Ohio Rail Road line. It junctions with the Cleveland Subdivision at Lester and the Greenwich Subdivision at Grafton.
Kensington is a passenger railroad station at 10417 Howard Avenue in Kensington, Maryland, United States. Opened by the Baltimore and Ohio Railroad (B&O) in 1891, the Kensington station is today served by MARC Train's Brunswick Line, which makes 15 weekday scheduled stops at Kensington, plus one flag stop on Fridays.
The Patterson Creek Cutoff is an abandoned railroad line built by the Baltimore and Ohio Railroad (B&O) in northern West Virginia and Western Maryland, that served trains running on the B&O "West End" line in the Cumberland, Maryland area. The cutoff route ran from McKenzie, Maryland to Patterson Creek, West Virginia, providing a bypass of the B&O rail yard in Cumberland for coal trains moving between Keyser, West Virginia and Brunswick, Maryland.
Camden Station, now also referred to as Camden Street Station, Camden Yards, and formally as the Transportation Center at Camden Yards, is a train station at the intersection of South Howard and West Camden Streets in Baltimore, Maryland, adjacent to Oriole Park at Camden Yards, behind the B&O Warehouse. It is served by MARC commuter rail service and local Light Rail trains.
The Baltimore Terminal Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. state of Maryland. The line runs from Baltimore to Halethorpe along the original Baltimore and Ohio Railroad (B&O) line, one of the oldest rail lines in the United States and the first passenger railroad line. At its east (north) end, it connects with the Philadelphia Subdivision; its west (south) end has a junction with the Capital Subdivision and the Old Main Line Subdivision.
