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, Trenton, Philadelphia, Wilmington, and Baltimore. The NEC closely parallels Interstate 95 for most of its length, and, as of 2013, is the busiest passenger rail line in the United States both by ridership and by service frequency. The NEC carries more than 2,200 trains daily.
Washington Union Station, known locally as Union Station, is a major train station, transportation hub, and leisure destination in Washington, D.C. Designed by Daniel Burnham and opened in 1907, it is Amtrak's headquarters, the railroad's second-busiest station, and North America's 10th-busiest railroad station. The station is the southern terminus of the Northeast Corridor, an electrified rail line extending north through major cities including Baltimore, Philadelphia, New York City, and Boston, and the busiest passenger rail line in the nation. In 2015, it served just under five million passengers.
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 12,100 per weekday as of the third quarter of 2023, less than pre-COVID-19 pandemic weekday ridership of 40,000.
Rockville station is an intermodal train station located in downtown Rockville, Maryland, United States. It is served by the Washington Metro Red Line, MARC Brunswick Line commuter trains, and Amtrak Capitol Limited intercity trains.
New Carrollton station is a joint Washington Metro, MARC, and Amtrak station just outside the city limits of New Carrollton, Prince George's County, Maryland located at the eastern end of the Metro's Orange Line. The station will also serve as the eastern terminus of the Purple Line, currently under construction, and is adjacent to the Capital Beltway.
Baltimore Penn Station, formally named Baltimore Pennsylvania Station in full, is the main inter-city passenger rail hub in Baltimore, Maryland. Designed by New York City architect Kenneth MacKenzie Murchison (1872–1938), it was constructed in 1911 in the Beaux-Arts style of architecture for the Pennsylvania Railroad. It is located at 1515 N. Charles Street, about a mile and a half north of downtown and the Inner Harbor, between the Mount Vernon neighborhood to the south, and Station North to the north. Originally called Union Station because it served the Pennsylvania Railroad and Western Maryland Railway, it was renamed to match other Pennsylvania Stations in 1928.
BWI Rail Station is an intermodal passenger station in Linthicum, Maryland near Baltimore/Washington International Airport (BWI). It is served by Amtrak Northeast Corridor intercity trains, MARC Penn Line regional rail trains, and several local bus lines.
The Queen City Hotel was constructed in 1871 by the Baltimore and Ohio Railroad (B&O) in Cumberland, Maryland to serve both as a train station and as a destination. Hosting 174 rooms, it also had such features as formal gardens with a fountain, a ballroom and 400-seat dining room. It was torn down in 1972 to make room for a new main United States Post Office and Distribution facility with a much smaller station for Amtrak service between the new Post Office and the railroad tracks.
The Alvarado Transportation Center (ATC) is a multimodal transit hub located at 100 1st Street SW in Downtown Albuquerque, New Mexico. The complex was built as a hub for Albuquerque's regional transit system and as a replacement for Albuquerque's previous bus depot and train station. The center serves ABQ RIDE, Amtrak, Greyhound Lines, and the New Mexico Rail Runner Express commuter rail line.
The Northern Central Railway (NCRY) was a Class I Railroad in the United States connecting Baltimore, Maryland, with Sunbury, Pennsylvania, along the Susquehanna River. Completed in 1858, the line came under the control of the Pennsylvania Railroad (PRR) in 1861, when the PRR acquired a controlling interest in the Northern Central's stock to compete with the rival Baltimore and Ohio Railroad (B&O).
The Harrisburg Transportation Center is a railway station and transportation hub in Harrisburg, Pennsylvania. It is located on the eastern edge of Downtown Harrisburg between the intersections of Aberdeen and Market Streets and 4th and Chestnut Streets.
Phoenix Union Station is a former train station at 401 South 4th Avenue in downtown Phoenix, Arizona, United States. From 1971 to 1996 it was an Amtrak station. Until 1971, it was a railroad stop for the Santa Fe and Southern Pacific Railroads. Union Station was served by Amtrak's Los Angeles–New Orleans Sunset Limited and Los Angeles–Chicago Texas Eagle. The station is on the National Register of Historic Places.
The Indianapolis Union Station is an intercity train station in the Wholesale District of Indianapolis, Indiana. The terminal is served by Amtrak's Cardinal line, passing through Indianapolis three times weekly.
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.
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 Bowie Railroad Buildings comprise three small frame structures at the former Bowie train station, located at the junction of what is now the Northeast Corridor and the Pope's Creek Subdivision in the town center of Bowie, Maryland. The complex includes a single-story freight depot, a two-story interlocking tower, and an open passenger shed. The station was served by passenger trains from 1872 until 1989, when it was replaced by Bowie State station nearby. The buildings were restored in 1992 as the Bowie Railroad Museum and added to the National Register of Historic Places in 1998.
Silver Spring station is a former train station on the Metropolitan Subdivision in Silver Spring in Montgomery County, Maryland. It was built in 1945 by the Baltimore and Ohio Railroad on the foundation of a previous station, a Victorian-style brick structure built in 1878. It served intercity trains until 1986 and commuter rail until 2000. Today, it is owned and operated as a museum by Montgomery Preservation, Inc., a non-profit organization.
Cumberland station is a historic railway station in Cumberland, Allegany County, Maryland. It was built in 1913 as a stop for the Western Maryland Railway (WM). The building was operated as a passenger station until the WM ended service in 1959, and it continued to be used by the railway until 1976. It was subsequently restored and currently serves as a museum and offices, as well as the operating base for a heritage railway.
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.
Allegany County Transit 
