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Southern Pine Lumber Co. 28
Southern Pine Lumber Co. 28 is a preserved 2-8-0 steam locomotive built by Baldwin in 1917 for the United States Army, now operating on the Texas State Railroad.
Southern Railway zone
The Southern Railway zone, also known as SR zone, is a zone of Indian Railways headquartered in Chennai, formed on 14 April 1951 as the first zone after independence.
Southwest Chief
The Southwest Chief is a daily Amtrak long-distance train covering 2,265 miles between Chicago and Los Angeles via Kansas City, Albuquerque, and Flagstaff, successor to the Santa Fe Super Chief.
Soviet and Russian locomotive classification
Soviet and Russian locomotive classification is a Cyrillic letter-and-digit system in which a locomotive's designation encodes its traction type, transmission, duty, and builder, applied across the whole USSR.
Soviet steam locomotive classes
Soviet steam locomotive classes were the standardized steam designs of Soviet Railways, replacing the Russian Empire's varied roster with mass-produced types like the SO, FD, L, and SU.
SPAD (railway)
A signal passed at danger (SPAD) is an event in which a train passes a stop signal without authority, prompting automatic train protection systems to reduce the risk.
Spark arrestor
A spark arrestor is a device fitted to a chimney, flue, or exhaust pipe to stop sparks and burning fragments from escaping, required on engines in fire-prone country.
Spencer Shops
Spencer Shops was the Southern Railway's principal locomotive repair and maintenance complex at Spencer, North Carolina, built from 1896 and now home to the North Carolina Transportation Museum.
Spirit of Progress
The Spirit of Progress was an express passenger train run by Victorian Railways from 1937 between Melbourne and Albury, Australia's first completely streamlined, air-conditioned, all-steel train.
SR (Korean rail operator)
SR is a South Korean public corporation that ran SRT high-speed trains from Suseo Station in Seoul, launched in 2016 as Korea's second high-speed rail operator before merging with KORAIL in 2026.
SR West Country and Battle of Britain classes
The SR West Country and Battle of Britain classes, known as the Bulleid light pacifics, were 110 British 4-6-2 steam locomotives built between 1945 and 1951.
St Pancras railway station
St Pancras railway station, officially London St Pancras International, is a central London terminus on Euston Road, opened in 1868 and the Eurostar terminal since 2007.
Stadler FLIRT
The Stadler FLIRT, short for Fast Light Innovative Regional Train, is a family of low-floor regional trains built by Stadler Rail since 2004, with about 2,700 sold.
Stadler METRO
The Stadler METRO is a family of lightweight electric metro trains built by Swiss manufacturer Stadler Rail, ordered for the Tyne and Wear Metro, Glasgow Subway, and Merseyrail.
Stadler Rail
Stadler Rail is a Swiss rolling stock manufacturer headquartered in Bussnang, founded in 1942, building locomotives, high-speed, regional, and underground trains, tram-trains, trams, and rack railways.
Stadler SMILE
The Stadler SMILE, also known as the Giruno, is a high-speed electric multiple unit built by Stadler Rail for Swiss Federal Railways, reaching 250 km/h and in service since 2019.
Standard-gauge railway
A standard-gauge railway, also known as Stephenson gauge, has rails 1,435 mm apart, a spacing proposed by George Stephenson and now the world's most widely used railway gauge.
Stansted Express
The Stansted Express is a dedicated train service linking London Liverpool Street with Stansted Airport, operated by Greater Anglia with a journey time of about 48 minutes.
Staten Island Railway
The Staten Island Railway, also known as Staten Island Rapid Transit, is the only rapid transit line on Staten Island, running 24/7 between St. George and Tottenville.
Station code
A station code is a short, usually alphabetic identifier for a railway or transit station in ticketing, reservation, or operating systems, independent of the station's name.
Steam locomotive
A steam locomotive is a self-propelled railway engine that burns fuel to boil water and drive pistons, the dominant form of railway traction for about 150 years.
Steam locomotives of British Railways
The steam locomotives of British Railways, operated from nationalisation on 1 January 1948 to August 1968, mixed engines inherited from the Big Four companies with Riddles' twelve BR Standard classes.
Steam locomotives of China Railway
The steam locomotives of China Railway were dominated by the QJ, JS, and SY classes, with the last regular steam service ending at Sandaoling coal mine in January 2024.
Steam locomotives of Imperial Russia
The steam locomotives of Imperial Russia were letter-designated classes, such as O, Shch, and E, built for the empire's 1,524 mm gauge railways from the 1870s to 1917.
Steam locomotives of Taiwan
The steam locomotives of Taiwan were Japanese-derived classes, including the CT150 and DT650, operated by the TRA until regular steam ended in the early 1980s.
Steam locomotives of the Argentine broad and metre gauge
Steam locomotives of the Argentine broad and meter gauge ran on 5 ft 6 in and 1,000 mm networks; in 1939 a Pacific averaged 65.4 mph over 188 miles.
Steam railcar
A steam railcar, or steam-powered railcar, is a self-propelled passenger coach carrying its own steam engine and boiler, an ancestor of the diesel multiple unit used on branch lines from around 1900.
Steam turbine locomotive
A steam turbine locomotive converts boiler steam into traction through a rotary turbine rather than cylinders, experimented with from 1918 through the 1950s in Sweden, Germany, Britain, and the United States.
Steam–diesel hybrid locomotives
A steam–diesel hybrid locomotive combines a steam plant and an internal-combustion engine in one machine. The best known is the Kitson–Still, tested by the LNER from 1928.
Stephenson's Rocket
Stephenson's Rocket, built by Robert Stephenson & Co. in 1829, won the Rainhill Trials for the Liverpool and Manchester Railway and became the template for later steam locomotives.