An elevated railway (also known as an El train for short) is a rapid transit railway with the tracks above street level on a viaduct or other elevated structure (usually constructed from steel, cast iron, concrete, or bricks). 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.
The earliest elevated railway was the London and Greenwich Railway on a brick viaduct of 878 arches, built between 1836 and 1838. The first 2.5 miles (4.0 km) of the London and Blackwall Railway (1840) was also built on a viaduct. During the 1840s there were other plans for elevated railways in London that never came to fruition.
From the late 1860s onward elevated railways became popular in US cities. The New York West Side and Yonkers Patent Railway operated with cable cars from 1868 to 1870, thereafter locomotive-hauled. This was followed by the Manhattan Railway in 1875, the South Side Elevated Railroad, Chicago (1892–), and the elevated lines of the Boston Elevated Railway (1901–). The Chicago transit system itself is known as "L", short for "elevated". The Berlin Stadtbahn (1882) and the Vienna Stadtbahn (1898) are also mainly elevated.
The first electric elevated railway was the Liverpool Overhead Railway, which operated through Liverpool docks from 1893 until 1956.
Most monorails are elevated railways, such as the Disneyland Monorail System (1959), the Tokyo Monorail (1964), the Sydney Monorail (1988–2013), the KL Monorail, the Las Vegas Monorail, and the São Paulo Monorail. Many maglev railways are also elevated.
During the 1890s there was some interest in suspension railways, particularly in Germany, with the Schwebebahn Dresden, (1891–) and the Wuppertal Schwebebahn (1901). H-Bahn suspension railways were built in Dortmund and Düsseldorf airport, 1975. The Memphis Suspension Railway opened in 1982.
People mover systems
People mover or automated people mover (APM) is a type of driverless grade-separated, mass-transit system. The term is generally used only to describe systems that serve as loops or feeder systems, but is sometimes applied to considerably more complex automated systems. Similar to monorails, Bombardier Innovia APM technology uses only one rail to guide the vehicle along the guideway. APMs are common at airports and effective at helping passengers quickly reach their gates. Several elevated APM systems at airports including the PHX Sky Train at Phoenix Sky Harbor International Airport; AeroTrain at Kuala Lumpur International Airport; and the Tracked Shuttle System at London Gatwick Airport, United Kingdom.
Full metro system
- Baltimore Metro (west of Mondawmin)
- BART (partial)
- Chicago "L" (except for parts of the Red Line and Blue Line)
- Cleveland Red Line (partial)
- Guadalajara light rail system Line 3 (partial under construction)
- Honolulu Rail Transit (under construction light metro)
- Medellín Metro
- Mexico City Metro (partial)
- Miami Metrorail
- New York City Subway (partial)
- Philadelphia “El” Market–Frankford Line (underground in downtown Philadelphia and West Philadelphia up to 40th Street Station but elevated elsewhere)
- Line 3 Scarborough, a medium capacity metro rail line in Toronto, Ontario, Canada
- SkyTrain, Vancouver, British Columbia, Canada.
- Washington Metro (partial)
- Bangalore metro
- Chennai Metro
- Chennai Mass Rapid Transit System
- Delhi Metro (Green Line)
- Hyderabad Metro
- Kochi Metro
- Kolkata Metro (future line 5 & 6, later is under construction)
- Lahore Metro (Orange Line)
- Manila Light Rail Transit System
- Mumbai Metro
- Mumbai Monorail
- Nagpur Metro
- Rapid Metro Gurgaon
- BTS Skytrain, two elevated rapid transit lines in Bangkok, Thailand
- Wenhu line, Taipei, Taiwan
- Berlin U-Bahn (U1 and U2 lines)
- Copenhagen Metro
- Docklands Light Railway (partial)
- Hamburg U-Bahn (U3 line)
- Paris Metro (Line 2 and Line 6)
- Vienna U-Bahn (U6 line)
- Wuppertal Suspension Railway
- Boston Elevated Railways - Atlantic Avenue Elevated, Charlestown Elevated, Washington Street Elevated, Causeway Street Elevated
- Elevated railways operated by the Interborough Rapid Transit Company and Brooklyn Rapid Transit Company in New York City
- Liverpool Overhead Railway
- The elevated Airport line of Kolkata Suburban Railway, closed in 2016 for reconstruction relating Kolkata Metro line 4
- Tomorrowland Transit Authority PeopleMover, a people mover at and around Tomorrowland, Magic Kingdom, Walt Disney World Resort, Orlando, Florida, United States
- AirTrain JFK, a people mover at and around John F. Kennedy International Airport, New York City, New York, United States
- ATL Skytrain, a people mover at Hartsfield–Jackson Atlanta International Airport, Atlanta, Georgia, United States
- Changi Airport Skytrain, an inter-terminal people mover at Changi International Airport in Singapore
- Detroit People Mover, an urban transit people mover in Detroit, Michigan, United States
- H-Bahn, an inter-terminal automated people mover in Dortmund and Düsseldorf, Germany
- Metromover, a people mover at Miami, Florida, United States
- PHX Sky Train, a people mover at Phoenix Sky Harbor International Airport, Phoenix, Arizona, United States
- UC San Diego Blue Line extension will mostly be aerial light rail.
- Réseau express métropolitain
- Phnom Penh SkyTrain (Cambodia)
- Managua Metro (Nicaragua)
- San Salvador Metro (El Salvador)
- Ljubljana Metro (Slovenia)