637 articles
InterCity 125
InterCity 125, also known as the High Speed Train (HST), is a British diesel passenger train that entered service in 1976 and became the world's fastest diesel train.
InterCity 225
The InterCity 225 is a British high-speed train of a Class 91 electric locomotive and Mark 4 coaches, built for the East Coast Main Line from 1989.
Intermodal freight transport
Intermodal freight transport moves goods in one and the same loading unit using two or more transport modes like road, rail, or air. It is a type of multimodal transport.
International Association of Sheet Metal, Air, Rail and Transportation Workers
SMART, the International Association of Sheet Metal, Air, Rail and Transportation Workers, is a North American labor union formed by the 2008 merger of the SMWIA and UTU, with about 230,000 members.
Invicta (locomotive)
Invicta is an early British steam locomotive built in 1829 by Robert Stephenson and Company for the Canterbury and Whitstable Railway, preserved today at the Whitstable Museum and Gallery.
Jackshaft (locomotive)
A jackshaft is a locomotive crankshaft, mounted in the frame and carrying no wheels, that passes motor power to the driving axles through side rods.
Janney coupler
The Janney coupler, also known as the knuckle coupler, is the automatic railroad coupler patented by Eli H. Janney of Virginia in 1873, letting cars couple on impact without a worker between them.
Japan Railways locomotive numbering and classification
Japan Railways locomotive numbering and classification is the system of class codes identifying locomotives on Japan's railways, first standardized in 1909 and still used by the JR companies.
Japanese electric locomotives
Japanese electric locomotives are the mainline electric traction fleet of Japan's national and private railways, including the ED75, EF58, and EF81 classes; EF58 61 still hauls the imperial train.
Japanese locomotive and multiple-unit classification
Japanese locomotive and multiple-unit classification is a family of systems in which JNR locomotive class letters encode driving axles and multiple-unit series are named for their leading motor coach.
Jenbacher
Jenbacher is an Austrian engine manufacturer based in Jenbach, Tyrol, known for diesel locomotives built from 1949 to 1999 and today as INNIO's Jenbacher gas engine brand.
Jersey Arrow
The Jersey Arrow is a family of electric multiple unit railcars for New Jersey's electrified commuter rail lines, comprising the Arrow I, II, and III series, introduced in 1968.
JNR Class C62
The JNR Class C62 (C62形) was a Japanese 4-6-4 express passenger steam locomotive built in 1948 and 1949, hauling flagship limited expresses on the Tokaido and Sanyo main lines.
JNR Class D51
The JNR Class D51 (D51形), nicknamed Degoichi, is a Japanese 2-8-2 tender steam locomotive built for freight from 1936, with 1,115 units built, the most numerous single class in Japan.
John Bull (locomotive)
The John Bull is an 1831 steam locomotive built by Robert Stephenson and Company for the Camden and Amboy Railroad, now displayed at the Smithsonian in Washington, D.C.
Kawasaki Heavy Industries C151
The Kawasaki Heavy Industries C151 was Singapore's first-generation MRT train, a fleet of 66 six-car trains built in Japan that served from 1987 until 2025.
Keikyu N1000 series
The Keikyu N1000 series (京急新1000形) is a commuter electric multiple unit run by Keikyu since 2002, built for through services onto the Toei Asakusa Line.
Kerr, Stuart and Company
Kerr, Stuart and Company was a British locomotive manufacturer founded in Glasgow in 1881, based at Stoke-on-Trent, which built about 1,500 locomotives before collapsing in 1930.
KiHa 100 series
The KiHa 100 series (キハ100系) is a diesel multiple unit built for JR East, introduced in 1990 to replace aging Japanese National Railways cars on rural non-electrified lines.
KiHa 181 series
The KiHa 181 series (キハ181系) was a limited express diesel multiple unit built by Japanese National Railways from 1968 to 1972, with 158 cars serving steep non-electrified lines until 2010.
KiHa 183 series (キハ183系)
The KiHa 183 series (キハ183系) is a Japanese limited-express diesel multiple unit designed for Hokkaido's snow and cold, the island's diesel express backbone from 1981 to 2023.
KiHa 40 series
The KiHa 40 series, also known as KiHa 40 (国鉄キハ40系), is a Japanese diesel multiple unit introduced by Japanese National Railways in 1977 for unelectrified local lines.
Kleinlokomotive
Kleinlokomotive, or Kleinlok, is a German classification for small, low-power shunting locomotives created by the Deutsche Reichsbahn-Gesellschaft in 1931; the best known is the Köf II.
Korea Train Express (한국고속철도)
Korea Train Express (한국고속철도), commonly known as KTX, is the high-speed rail service of South Korea, operated by KORAIL since 2004 and cutting Seoul–Busan to under three hours.
Krauss-Maffei ML 2200 C'C'
The Krauss-Maffei ML 2200 C'C' was a six-axle diesel-hydraulic locomotive built in Munich in 1957 for the Yugoslav State Railways, where it ran as class 761.
Kriegslokomotive
Kriegslokomotive, also known as Kriegslok, is the German wartime steam locomotive designation, above all the class 52 freight locomotive, about 7,000 of which were built from 1942.
KTM Class 26
The KTM Class 26, known as the Blue Tiger, is a class of 20 diesel-electric locomotives delivered to Malaysia's KTM in 2003 for passenger and freight service.
KTX-I
The KTX-I, also called KTX-1, is South Korea's first-generation high-speed train, a twenty-car TGV-derived trainset built by Alstom that entered service on April 1, 2004.
KTX-Sancheon
KTX-Sancheon is a South Korean high-speed train built by Hyundai Rotem with domestic Korean technology, the second high-speed fleet in KORAIL service, entering use in 2010.
Kylchap
The Kylchap is a multi-stage exhaust system for steam locomotives, developed by French engineer André Chapelon from Kyösti Kylälä's design, which improved draught while reducing cylinder back pressure.