Northeast Corridor in the context of "Keystone Service"

Inter-city rail services are express trains that run services that connect cities over longer distances than commuter or regional trains. They include rail services that are neither short-distance commuter rail trains within one city area nor slow regional rail trains stopping at all stations and covering local journeys only. An inter-city train is typically an express train with limited stops and comfortable carriages to serve long-distance travel.

Inter-city rail sometimes provides international services. This is most prevalent in Europe because of the proximity of its 50 countries to a 10,180,000-square-kilometre (3,930,000-square-mile) area. Eurostar and EuroCity are examples. In many European countries, the word InterCity or Inter-City is an official brand name for a network of regular-interval and relatively long-distance train services that meet certain criteria of speed and comfort. That use of the term appeared in the United Kingdom in the 1960s and has been widely imitated.

30th Street Station, officially William H. Gray III 30th Street Station, is a major intermodal transit station in Philadelphia, Pennsylvania, United States. The station opened in 1933 as Pennsylvania Station–30th Street, replacing the 1881 Broad Street station as the Pennsylvania Railroad's main station in the city. The station is the third-busiest Amtrak station in the nation with over 4.1 million passengers as of 2023.

30th Street Station is currently metropolitan Philadelphia's main railroad station and a major stop on Amtrak's Northeast and Keystone corridors. The station is also a major commuter rail station served by all SEPTA Regional Rail lines and is the western terminus for NJ Transit's Atlantic City Line. The station is also served by several SEPTA-managed city and suburban buses and by NJ Transit, Amtrak Thruway, and various intercity operators.

The Acela (/əˈsɛlə/ ə-SEL-ə; originally the Acela Express until September 2019) is Amtrak's flagship passenger train service along the Northeast Corridor (NEC) in the Northeastern United States between Washington, D.C., and Boston via 13 intermediate stops, including Baltimore, New York City and Philadelphia. Acela trains are the fastest in the Americas, reaching 150–160 miles per hour (240–260 km/h), qualifying as high-speed rail, but only for approximately 40 miles (64 km) of the 457-mile (735 km) route.

In fiscal year 2024, Acela carried more than 3.2 million passengers, second only to the slower and less expensive Northeast Regional, which had over 10.8 million passengers. Ridership was down from the pre-COVID-19 pandemic high of 3,557,455 passengers in 2019. Its 2024 revenue of $531 million was around 21% of Amtrak's total.

Pennsylvania Station (also known as New York Penn Station or simply Penn Station) is the main intercity railroad station in New York City and the busiest transportation facility in the Western Hemisphere, serving more than 600,000 passengers per weekday as of 2019. The station is located beneath Madison Square Garden in the block bounded by Seventh and Eighth Avenues and 31st and 33rd Streets and in the James A. Farley Building, with additional exits to nearby streets, in Midtown Manhattan. It is close to several popular Manhattan locations, including Herald Square, the Empire State Building, Koreatown, and Macy's Herald Square.

Penn Station has 21 tracks fed by seven tunnels, including its two North River Tunnels, four East River Tunnels, and one Empire Connection tunnel. It is at the center of the Northeast Corridor, a passenger rail line that connects New York City with Boston to its north and Philadelphia, Baltimore, and Washington, D.C. to its south, along with various intermediate stations. Intercity trains are operated by Amtrak, which owns the station, while commuter rail services are operated by the Long Island Rail Road (LIRR) and NJ Transit (NJT). Connections are available within the complex to the New York City Subway and buses.

The Atlantic City Line (ACL) is a commuter rail line operated by NJ Transit (NJT) in the United States between Philadelphia, Pennsylvania and Atlantic City, New Jersey, operating along the corridor of the White Horse Pike. It runs over trackage that was controlled by both the Pennsylvania Railroad (PRR) and the Pennsylvania-Reading Seashore Lines. It shares trackage with SEPTA and Amtrak on the Northeast Corridor (NEC) until it crosses the Delaware River on Conrail's Delair Bridge into New Jersey.

The Atlantic City Line also shares the right-of-way with the PATCO Speedline between Haddonfield and Lindenwold, New Jersey. There are 12 departures each day in each direction. Conrail also uses short sections of the line for freight movements (which are segregated), including the NEC-Delair Bridge section to its main freight yard in Camden, New Jersey. Unlike all other NJT railway lines, the Atlantic City line does not have traditional rush hour service. The Atlantic City line is colored dark blue on New Jersey Transit's system maps, and the line's symbol is a lighthouse, an homage to the Absecon Lighthouse.

The Northeast Regional is an intercity rail service operated by Amtrak in the Northeastern and Mid-Atlantic United States. In the past it has been known as the NortheastDirect, Acela Regional, or Regional. It is Amtrak's busiest route, carrying 9,163,082 passengers in fiscal year (FY) 2023. The Northeast Regional service received more than $787.7 million in gross ticket revenue in FY 2023.

The Northeast Regional offers daily all-reserved service, usually at least every hour. Trains generally run along the Northeast Corridor between Boston in the north to Washington, D.C., in the south with multiple stops, including in New York City, Philadelphia, and Baltimore. Extensions and branches provide service to Newport News, Norfolk, and Roanoke, Virginia, and Springfield, Massachusetts, with intermediate stops.

CT Rail, stylized as CTrail, is the brand for commuter rail services overseen by the Connecticut Department of Transportation (CTDOT), in the U.S. state of Connecticut, with services on the Hartford Line extending into Massachusetts. CTDOT oversees two lines: Shore Line East, between New Haven and New London, Connecticut, and the Hartford Line, from New Haven, through Hartford, to Springfield, Massachusetts.

Services are operated under contract, with Shore Line East operated by Amtrak along the Northeast Corridor, and the Hartford Line operated by a joint venture of TransitAmerica Services and Alternate Concepts. CT Rail trains, along with other CTDOT rail operations, use the reporting mark CNDX.