Eisenhower Avenue station

The National Science Foundation (NSF) is an independent agency of the United States government that supports fundamental research and education in all the non-medical fields of science and engineering. Its medical counterpart is the National Institutes of Health. With an annual budget of about $8.3 billion, the NSF funds approximately 25% of all federally supported basic research conducted by the United States' colleges and universities. In some fields, such as mathematics, computer science, economics, and the social sciences, the NSF is the major source of federal backing.

The United States Patent and Trademark Office (USPTO) is an agency in the U.S. Department of Commerce that serves as the national patent office and trademark registration authority for the United States. The USPTO's headquarters are in Alexandria, Virginia, after a 2005 move from the Crystal City area of neighboring Arlington, Virginia.

Ronald Reagan Washington National Airport station is a Washington Metro station in Arlington, Virginia on the Blue and Yellow Lines. The station platform is elevated and covered and is the last above-ground station on the Yellow Line in Virginia, heading into Washington, D.C. It is one of only two stations in the system to have three tracks. The station is located across Smith Boulevard from Terminal 2 at Ronald Reagan Washington National Airport; the mezzanine is directly connected to Level 2 of the terminal by two pedestrian bridges. Airport shuttle buses or a walkway connect the station and Terminal 1. The airport's Abingdon Plantation historical site is near the station.

Huntington is an island-platformed Washington Metro station in the Huntington area of Fairfax County, Virginia, United States. The station was opened on December 17, 1983, and is operated by the Washington Metropolitan Area Transit Authority (WMATA). Serving as the southern terminus for the Yellow Line, the station is built into a hillside; the south mezzanine, along with escalator access, is accessible via an incline elevator.

Braddock Road is an island-platformed Washington Metro station in Alexandria, Virginia, United States. The station was opened on December 17, 1983, and is operated by the Washington Metropolitan Area Transit Authority (WMATA). Providing service for both the Blue and Yellow Lines, the station is located at Braddock Road and West Street.

King Street–Old Town is a Washington Metro station in Alexandria, Virginia, United States. The station opened on December 17, 1983, and is operated by the Washington Metropolitan Area Transit Authority (WMATA). Providing service for both the Blue and Yellow Lines, this is the southernmost transfer station for the Blue and Yellow lines, as the two lines diverge just south of the station. During inclement weather, Crystal City is commonly used as an unofficial transfer point, being the southernmost underground station common to both lines. King Street was originally served only by the Yellow Line, until the Blue Line was extended from National Airport to Van Dorn Street in 1991.

Potomac Yard station is a Washington Metro station under construction in Alexandria, Virginia, United States. The station will be operated by the Washington Metropolitan Area Transit Authority (WMATA), serving both the Blue and Yellow Lines, and is expected to open in May 2023. The station will be located at Alexandria's planned 7.5-million-square-foot (700,000 m2) Potomac Yard mixed-use development bounded by Richmond Highway and the George Washington Memorial Parkway. Upon its completion, Potomac Yard will be the second infill station to be added to the Washington Metro system, after NoMa–Gallaudet U in 2004. Potomac Yard station is being constructed on the site of Potomac Yard, a former railroad freight yard.

The Blue Line is a rapid transit line of the Washington Metro system, consisting of 27 stations in Fairfax County, Alexandria and Arlington, Virginia; the District of Columbia; and Prince George's County, Maryland, United States. The Blue Line runs from Franconia–Springfield to Downtown Largo. The line shares tracks with the Orange Line for 13 stations, the Silver Line for 18, and the Yellow Line for six. Only three stations are exclusive to the Blue Line.

The 14th Street bridges refers to the three bridges near each other that cross the Potomac River, connecting Arlington, Virginia and Washington, D.C. Sometimes the two nearby rail bridges are included as part of the 14th Street bridge complex. A major gateway for automotive, bicycle and rail traffic, the bridge complex is named for 14th Street, which feeds automotive traffic into it on the D.C. end.

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.

An elevated railway or elevated train is a rapid transit railway with the tracks above street level on a viaduct or other elevated structure. The railway may be broad-gauge, standard-gauge or narrow-gauge railway, light rail, monorail, or a suspension railway. Elevated railways are normally found in urban areas where there would otherwise be multiple level crossings. Usually, the tracks of elevated railways that run on steel viaducts can be seen from street level.

A side platform is a platform positioned to the side of one or more railway tracks or guideways at a railway station, tram stop, or transitway. A station having dual side platforms, one for each direction of travel, is the basic design used for double-track railway lines. Side platforms may result in a wider overall footprint for the station compared with an island platform where a single width of platform can be shared by riders using either track.

West Hyattsville is a Washington Metro station in Hyattsville, Maryland on the Green Line. It is the first station in Maryland northeast on the Green Line, and is located at 2700 Hamilton Street, near the west side of Ager Road and the north side of Queens Chapel Road.

An elevator or lift is a machine that vertically transports people or freight between levels. They are typically powered by electric motors that drive traction cables and counterweight systems such as a hoist, although some pump hydraulic fluid to raise a cylindrical piston like a jack.

The Yellow Line is a rapid transit line of the Washington Metro system that runs between Huntington Station in Virginia and Greenbelt station in Maryland. It consists of 21 stations in Fairfax County, Alexandria County, and Arlington County in Virginia, as well as Washington, D.C. and Prince George's County, Maryland.

Huntington is an island-platformed Washington Metro station in the Huntington area of Fairfax County, Virginia, United States. The station was opened on December 17, 1983, and is operated by the Washington Metropolitan Area Transit Authority (WMATA). Serving as the southern terminus for the Yellow Line, the station is built into a hillside; the south mezzanine, along with escalator access, is accessible via an incline elevator.

The Blue Line is a rapid transit line of the Washington Metro system, consisting of 27 stations in Fairfax County, Alexandria and Arlington, Virginia; the District of Columbia; and Prince George's County, Maryland, United States. The Blue Line runs from Franconia–Springfield to Downtown Largo. The line shares tracks with the Orange Line for 13 stations, the Silver Line for 18, and the Yellow Line for six. Only three stations are exclusive to the Blue Line.

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.

King Street–Old Town is a Washington Metro station in Alexandria, Virginia, United States. The station opened on December 17, 1983, and is operated by the Washington Metropolitan Area Transit Authority (WMATA). Providing service for both the Blue and Yellow Lines, this is the southernmost transfer station for the Blue and Yellow lines, as the two lines diverge just south of the station. During inclement weather, Crystal City is commonly used as an unofficial transfer point, being the southernmost underground station common to both lines. King Street was originally served only by the Yellow Line, until the Blue Line was extended from National Airport to Van Dorn Street in 1991.