The Baltimore and Ohio Railroad was the first common carrier railroad and the oldest railroad in the United States with its first section opening in 1830. Merchants from Baltimore, which had benefited to some extent from the construction of the National Road early in the century, wanted to do business with settlers crossing the Appalachian Mountains. The railroad faced competition from several existing and proposed enterprises, including the Albany-Schenectady Turnpike, built in 1797, the Erie Canal, which opened in 1825, and the Chesapeake and Ohio Canal.
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 2022, the system had a ridership of 2,815,900, or about 11,800 per weekday as of the first quarter of 2023, less than pre-COVID-19 pandemic weekday ridership of 40,000.
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.
Magnolia is an unincorporated community northeast of Paw Paw in Morgan County in the U.S. state of West Virginia on the Potomac River. Magnolia is located along the Baltimore and Ohio Railroad mainline and east of where the Western Maryland Railway crosses the Potomac, bypassing a series of bends in the river. As a depot and water station on the B&O, Magnolia has been known by a number of names including Magnolia Dale, Magnolia Vale, and sometimes as Water Station Number 12 on the railroad.
The Old Main Line Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. state of Maryland. The line runs from Relay west to Point of Rocks, and was once the main line of the Baltimore and Ohio Railroad, one of the oldest rail lines in the United States. At its east end, it has junctions with the Capital Subdivision and the Baltimore Terminal Subdivision; its west end has a junction with the Metropolitan Subdivision.
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 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 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 Metropolitan Subdivision is a railroad line owned and operated by CSX Transportation in the District of Columbia and the U.S. state of 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 Brunswick Line is a MARC commuter rail line between Washington, D.C., and Martinsburg, West Virginia, with a branch to Frederick, Maryland. It primarily serves the northern and western suburbs of Washington. The line, MARC's second longest at 74 miles, is operated under contract to MARC by Alstom and runs on CSX-owned track, including the Metropolitan, Old Main Line, and Cumberland subdivisions. It is the successor to commuter services provided by the Baltimore & Ohio Railroad (B&O), which date to the mid-19th century.
The Lurgan Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. states of Pennsylvania, Maryland, and West Virginia. The line runs from Chambersburg, Pennsylvania, south to Hagerstown, Maryland, and west to Cherry Run, West Virginia, along a former Western Maryland Railway line. It meets the Hanover Subdivision at Hagerstown and the Cumberland Subdivision at Cherry Run. The line is named after its former northern end in Lurgan Township, Franklin County, Pennsylvania, where the Western Maryland once connected to the Reading Company along the Alphabet Route.
Martinsburg station is a railway station in Martinsburg, West Virginia, United States, served by MARC Brunswick Line commuter rail service and Amtrak Capitol Limited intercity rail service. The station has one side platform serving a siding track of the CSX Cumberland Subdivision, with a footbridge crossing the siding and the two main tracks to provide access to the preserved Baltimore and Ohio Railroad Martinsburg Shops complex.
The Pope's Creek Subdivision is a CSX Transportation railroad line in Maryland, running from Bowie to Morgantown where the Morgantown Generating Station is located and the Chalk Point Generating Station.
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.
The B & O Railroad Potomac River Crossing is a 15-acre (6.1 ha) historic site where a set of railroad bridges, originally built by the Baltimore and Ohio Railroad, span the Potomac River between Sandy Hook, Maryland and Harpers Ferry, West Virginia. The site was added to the National Register of Historic Places on February 14, 1978, for its significance in commerce, engineering, industry, invention, and transportation.
The RF&P Subdivision is a railroad line operated by CSX Transportation and jointly owned by CSX and Virginia. It runs from Washington, D.C., to Richmond, Virginia, over lines previously owned by the Pennsylvania Railroad and the Richmond, Fredericksburg and Potomac Railroad. The line's name pays homage to that railroad, which was a predecessor to the CSX.
The Alexandria Extension is a short rail line in Washington, D.C. and Prince George's County, Maryland. Its northern portion connects the Capital Subdivision to the RF&P Subdivision, allowing freight trains to avoid Downtown Washington. Its southern portion, the Shepherd Industrial Spur, extends south to Shepherds Landing, directly across the Potomac River from Alexandria, Virginia; service on this portion ended in 2001.
The Cumberland Terminal Subdivision is a railroad line owned and operated by CSX Transportation in the Cumberland, Maryland area. The line centers on the Cumberland rail yard and is a junction with three other subdivisions.
