Rail transport

Rail transport(also known astrain transport) is ameans of transportusing wheeled vehicles running intracks,which usually consist of two parallelsteel rails.^[1]Rail transport is one of the two primary means ofland transport,next toroad transport.It is used for about 8% of passenger and freight transport globally,^[2]thanks to itsenergy efficiency^[2]and potentiallyhigh speed.

Rolling stockon rails generally encounters lowerfrictional resistancethan rubber-tyred road vehicles, allowing rail cars to be coupled into longertrains.Power is usually provided bydieselorelectrical locomotives.While railway transport iscapital-intensiveand less flexible than road transport, it can carry heavy loads of passengers and cargo with greater energy efficiency and safety.^[a]

Precursors of railways driven by human or animal power have existed since antiquity, but modern rail transport began with the invention of thesteam locomotivein theUnited Kingdomat the beginning of the 19th century. The first passenger railway, theStockton and Darlington Railway,opened in 1825. The quick spread of railways throughout Europe and North America, following the1830 opening of the first intercity connectionin England, was a key component of theIndustrial Revolution.The adoption of rail transport loweredshippingcosts compared to water transport, leading to "national markets" in which prices varied less from city to city.

In the 1880s,railway electrificationbegan with tramways and rapid transit systems. Starting in the 1940s, steam locomotives were replaced bydiesel locomotives.The firsthigh-speed railway systemwas introduced inJapanin 1964, and high-speed rail lines now connect many citiesin Europe,East Asia,andthe eastern United States.Following some decline due to competition from cars and airplanes, rail transport has had a revival in recent decades due toroad congestionand rising fuel prices, as well as governmentsinvesting in railas a means of reducingCO₂emissions.

History

Smooth, durableroad surfaceshave been made forwheeled vehiclessince prehistoric times. In some cases, they were narrow and in pairs to support only the wheels. That is, they werewagonwaysor tracks. Some had grooves or flanges or other mechanical means to keep the wheels on track.

For example, evidence indicates that a 6 to 8.5 km longDiolkospaved trackway transported boats across theIsthmus of CorinthinGreecefrom around 600 BC. The Diolkos was in use for over 650 years, until at least the 1st century AD.^[3]Paved trackways were also later built inRoman Egypt.^[4]

Pre-steam modern systems

Wooden rails introduced

In 1515,Cardinal Matthäus Langwrote a description of theReisszug,afunicularrailway at theHohensalzburg Fortressin Austria. The line originally used wooden rails and ahemphaulage rope and was operated by human or animal power, through atreadwheel.^[5]The line is still operational, although in updated form and is possibly the oldest operational railway.^[6]

Wagonways (ortramways) using wooden rails, hauled by horses, started appearing in the 1550s to facilitate the transport of ore tubs to and from mines and soon became popular in Europe. Such an operation was illustrated in Germany in 1556 byGeorgius Agricolain his workDe re metallica.^[7]This line used "Hund" carts with unflanged wheels running on wooden planks and a vertical pin on the truck fitting into the gap between the planks to keep it going the right way. The miners called the wagonsHunde( "dogs" ) from the noise they made on the tracks.^[8]

There are many references to their use in central Europe in the 16th century.^[9]Such a transport system was later used by German miners atCaldbeck,Cumbria,England, perhaps from the 1560s.^[10]A wagonway was built atPrescot,nearLiverpool,sometime around 1600, possibly as early as 1594. Owned by Philip Layton, the line carried coal from a pit near Prescot Hall to a terminus about one-half mile (800 m) away.^[11]A funicular railway was also made atBroseleyinShropshiresome time before 1604. This carried coal for James Clifford from his mines down to theRiver Severnto be loaded onto barges and carried to riverside towns.^[12]TheWollaton Wagonway,completed in 1604 byHuntingdon Beaumont,has sometimes erroneously been cited as the earliest British railway. It ran fromStrelleytoWollatonnearNottingham.^[13]

TheMiddleton RailwayinLeeds,which was built in 1758, later became the world's oldest operational railway (other than funiculars), albeit now in an upgraded form. In 1764, the first railway in the Americas was built inLewiston, New York.^[14]

Metal rails introduced

In the late 1760s, theCoalbrookdaleCompany began to fix plates ofcast ironto the upper surface of the wooden rails. This allowed a variation ofgaugeto be used. At first onlyballoon loopscould be used for turning, but later, movable points were taken into use that allowed for switching.^[15]

A system was introduced in which unflanged wheels ran on L-shaped metal plates, which came to be known asplateways.John Curr,aSheffieldcolliery manager, invented this flanged rail in 1787, though the exact date of this is disputed. The plate rail was taken up byBenjamin Outramfor wagonways serving his canals, manufacturing them at hisButterley ironworks.In 1803,William Jessopopened theSurrey Iron Railway,a double track plateway, erroneously sometimes cited as world's first public railway, in south London.^[16]

William Jessophad earlier used a form of all-ironedge railand flanged wheels successfully for an extension to theCharnwood Forest CanalatNanpantan,Loughborough, Leicestershire in 1789. In 1790, Jessop and his partner Outram began to manufacture edge rails. Jessop became a partner in the Butterley Company in 1790. The first public edgeway (thus also first public railway) built wasLake Lock Rail Roadin 1796. Although the primary purpose of the line was to carry coal, it also carried passengers.

These two systems of constructing iron railways, the "L" plate-rail and the smooth edge-rail, continued to exist side by side until well into the early 19th century. The flanged wheel and edge-rail eventually proved its superiority and became the standard for railways.

Cast iron used in rails proved unsatisfactory because it was brittle and broke under heavy loads. Thewrought ironinvented byJohn Birkinshawin 1820 replaced cast iron. Wrought iron, usually simply referred to as "iron", was a ductile material that could undergo considerable deformation before breaking, making it more suitable for iron rails. But iron was expensive to produce untilHenry Cortpatented thepuddling processin 1784. In 1783 Cort also patented therolling process,which was 15 times faster at consolidating and shaping iron than hammering.^[17]These processes greatly lowered the cost of producing iron and rails. The next important development in iron production washot blastdeveloped byJames Beaumont Neilson(patented 1828), which considerably reduced the amount ofcoke (fuel)or charcoal needed to produce pig iron.^[18]Wrought iron was a soft material that contained slag ordross.The softness and dross tended to make iron rails distort and delaminate and they lasted less than 10 years. Sometimes they lasted as little as one year under high traffic. All these developments in the production of iron eventually led to the replacement of composite wood/iron rails with superior all-iron rails. The introduction of theBessemer process,enabling steel to be made inexpensively, led to the era of great expansion of railways that began in the late 1860s. Steel rails lasted several times longer than iron.^[19]^[20]^[21]Steel rails made heavier locomotives possible, allowing for longer trains and improving the productivity of railroads.^[22]The Bessemer process introduced nitrogen into the steel, which caused the steel to become brittle with age. Theopen hearth furnacebegan to replace the Bessemer process near the end of the 19th century, improving the quality of steel and further reducing costs. Thus steel completely replaced the use of iron in rails, becoming standard for all railways.

The first passengerhorsecarortram,Swansea and Mumbles Railway,was opened betweenSwanseaandMumblesinWalesin 1807.^[23]Horses remained the preferable mode for tram transport even after the arrival of steam engines until the end of the 19th century, because they were cleaner compared to steam-driven trams which caused smoke in city streets.

Steam power introduced

A replica of Trevithick's engine at theNational Waterfront MuseuminSwansea,Wales

In 1784James Watt,a Scottish inventor and mechanical engineer, patented a design for asteam locomotive.Watt had improved thesteam engineofThomas Newcomen,hitherto used to pump water out of mines, and developed areciprocating enginein 1769 capable of powering a wheel. This was a largestationary engine,powering cotton mills and a variety of machinery; the state of boiler technology necessitated the use of low-pressure steam acting upon a vacuum in the cylinder, which required a separatecondenserand anair pump.Nevertheless, as the construction of boilers improved, Watt investigated the use of high-pressure steam acting directly upon a piston, raising the possibility of a smaller engine that might be used to power a vehicle. Following his patent, Watt's employeeWilliam Murdochproduced a working model of a self-propelled steam carriage in that year.^[24]

The first full-scale working railwaysteam locomotivewas built in the United Kingdom in 1804 byRichard Trevithick,a British engineer born inCornwall.This used high-pressure steam to drive the engine by one power stroke. The transmission system employed a largeflywheelto even out the action of the piston rod. On 21 February 1804, the world's first steam-powered railway journey took place when Trevithick's unnamed steam locomotive hauled a train along the tramway of thePenydarrenironworks, near Merthyr Tydfil inSouth Wales.^[25]^[26]Trevithick later demonstrated a locomotive operating upon a piece of circular rail track inBloomsbury,London, theCatch Me Who Can,but never got beyond the experimental stage with railway locomotives, not least because his engines were too heavy for the cast-iron plateway track then in use.^[27]

The first commercially successful steam locomotive wasMatthew Murray'sracklocomotiveSalamancabuilt for theMiddleton RailwayinLeedsin 1812. This twin-cylinder locomotive was light enough to not break theedge-railstrack and solved the problem ofadhesionby acog-wheelusing teeth cast on the side of one of the rails. Thus it was also the firstrack railway.

This was followed in 1813 by the locomotivePuffing Billybuilt byChristopher BlackettandWilliam Hedleyfor theWylamColliery Railway, the first successful locomotive running byadhesiononly. This was accomplished by the distribution of weight between a number of wheels.Puffing Billyis now on display in theScience Museumin London, and is the oldest locomotive in existence.^[28]^[29]

In 1814,George Stephenson,inspired by the early locomotives of Trevithick, Murray and Hedley, persuaded the manager of theKillingworth collierywhere he worked to allow him to build asteam-poweredmachine. Stephenson played a pivotal role in the development and widespread adoption of the steam locomotive. His designs considerably improved on the work of the earlier pioneers. He built the locomotiveBlücher,also a successfulflanged-wheel adhesion locomotive. In 1825 he built the locomotiveLocomotionfor theStockton and Darlington Railwayin the northeast of England, which became the first public steam railway in the world in 1825, although it used both horse power and steam power on different runs. In 1829, he built the locomotiveRocket,which entered in and won theRainhill Trials.This success led to Stephenson establishing his company as the pre-eminent builder of steam locomotives for railways in Great Britain and Ireland, the United States, and much of Europe.^[30]^: 24–30The first public railway which used only steam locomotives, all the time, wasLiverpool and Manchester Railway,built in 1830.^[31]

Steam power continued to be the dominant power system in railways around the world for more than a century.

Electric power introduced

The first known electric locomotive was built in 1837 by chemistRobert DavidsonofAberdeenin Scotland, and it was powered bygalvanic cells(batteries). Thus it was also the earliest battery-electric locomotive. Davidson later built a larger locomotive namedGalvani,exhibited at theRoyal Scottish Society of ArtsExhibition in 1841. The seven-ton vehicle had twodirect-drive reluctance motors,with fixed electromagnets acting on iron bars attached to a wooden cylinder on each axle, and simplecommutators.It hauled a load of six tons at four miles per hour (6 kilometers per hour) for a distance of one and a half miles (2.4 kilometres). It was tested on theEdinburgh and Glasgow Railwayin September of the following year, but the limited power from batteries prevented its general use. It was destroyed by railway workers, who saw it as a threat to their job security.^[32]^[33]^[34]By the middle of the nineteenth century most european countries had military uses for railways.^[35]

Werner von Siemensdemonstrated an electric railway in 1879 in Berlin. The world's first electric tram line,Gross-Lichterfelde Tramway,opened inLichterfeldenearBerlin,Germany, in 1881. It was built by Siemens. The tram ran on 180 volts DC, which was supplied by running rails. In 1891 the track was equipped with anoverhead wireand the line was extended toBerlin-Lichterfelde West station.TheVolk's Electric Railwayopened in 1883 inBrighton,England. The railway is still operational, thus making it the oldest operational electric railway in the world. Also in 1883,Mödling and Hinterbrühl Tramopened near Vienna in Austria. It was the first tram line in the world in regular service powered from an overhead line. Five years later, in the U.S. electrictrolleyswere pioneered in 1888 on theRichmond Union Passenger Railway,using equipment designed byFrank J. Sprague.^[36]

The first use of electrification on a main line was on a four-mile section of theBaltimore Belt Lineof theBaltimore and Ohio Railroad(B&O) in 1895 connecting the main portion of the B&O to the new line toNew Yorkthrough a series of tunnels around the edges of Baltimore's downtown. Electricity quickly became the power supply of choice for subways, abetted by the Sprague's invention of multiple-unit train control in 1897. By the early 1900s most street railways were electrified.

TheLondon Underground,the world's oldest underground railway, opened in 1863, and it began operating electric services using afourth railsystem in 1890 on theCity and South London Railway,now part of theLondon Underground Northern line.This was the first major railway to useelectric traction.The world's first deep-level electric railway, it runs from theCity of London,under theRiver Thames,toStockwellin south London.^[37]

The first practicalACelectric locomotive was designed byCharles Brown,then working forOerlikon,Zürich. In 1891, Brown had demonstrated long-distance power transmission, usingthree-phase AC,between ahydro-electric plantatLauffen am NeckarandFrankfurt am MainWest, a distance of 280 km (170 mi). Using experience he had gained while working forJean Heilmannon steam–electric locomotive designs, Brown observed thatthree-phase motorshad a higherpower-to-weight ratiothanDCmotors and, because of the absence of acommutator,were simpler to manufacture and maintain.^[b]However, they were much larger than the DC motors of the time and could not be mounted in underfloorbogies:they could only be carried within locomotive bodies.^[39]

In 1894, Hungarian engineerKálmán Kandódeveloped a new type 3-phase asynchronous electric drive motors and generators for electric locomotives. Kandó's early 1894 designs were first applied in a short three-phase AC tramway inÉvian-les-Bains(France), which was constructed between 1896 and 1898.^[40]^[41]

In 1896, Oerlikon installed the first commercial example of the system on theLugano Tramway.Each 30-tonne locomotive had two 110 kW (150 hp) motors run by three-phase 750 V 40 Hz fed from double overhead lines. Three-phase motors run at a constant speed and provideregenerative braking,and are well suited to steeply graded routes, and the first main-line three-phase locomotives were supplied by Brown (by then in partnership withWalter Boveri) in 1899 on the 40 kmBurgdorf–Thun line,Switzerland.

Italian railways were the first in the world to introduce electric traction for the entire length of a main line rather than a short section. The 106 kmValtellinaline was opened on 4 September 1902, designed by Kandó and a team from the Ganz works.^[42]^[43]The electrical system was three-phase at 3 kV 15 Hz. In 1918,^[44]Kandó invented and developed therotary phase converter,enabling electric locomotives to use three-phase motors whilst supplied via a single overhead wire, carrying the simple industrial frequency (50 Hz) single phase AC of the high-voltage national networks.^[43]

An important contribution to the wider adoption of AC traction came from SNCF of France after World War II. The company conducted trials at AC 50 Hz, and established it as a standard. Following SNCF's successful trials, 50 Hz, now also called industrial frequency was adopted as standard for main-lines across the world.^[45]

Diesel power introduced

Swiss&Germanco-production: world's first functional diesel–electric railcar 1914

Earliest recorded examples of aninternal combustion enginefor railway use included a prototype designed byWilliam Dent Priestman.Sir William Thomsonexamined it in 1888 and described it as a "Priestman oil engine mounted upon a truck which is worked on a temporary line of rails to show the adaptation of a petroleum engine for locomotive purposes."^[46]^[47]In 1894, a 20 hp (15 kW) two axle machine built byPriestman Brotherswas used on theHull Docks.^[48]

In 1906,Rudolf Diesel,Adolf Kloseand the steam and diesel engine manufacturerGebrüder Sulzerfounded Diesel-Sulzer-Klose GmbH to manufacture diesel-powered locomotives. Sulzer had been manufacturing diesel engines since 1898. The Prussian State Railways ordered a diesel locomotive from the company in 1909. The world's first diesel-powered locomotive was operated in the summer of 1912 on theWinterthur–Romanshorn railwayin Switzerland, but was not a commercial success.^[49]The locomotive weight was 95 tonnes and the power was 883 kW with a maximum speed of 100 km/h (62 mph).^[50]Small numbers of prototype diesel locomotives were produced in a number of countries through the mid-1920s. TheSoviet Unionoperated three experimental units of different designs since late 1925, though only one of them (theE el-2) proved technically viable.^[51]

A significant breakthrough occurred in 1914, whenHermann Lemp,aGeneral Electricelectrical engineer, developed and patented a reliabledirect currentelectrical control system (subsequent improvements were also patented by Lemp).^[52]Lemp's design used a single lever to control both engine and generator in a coordinated fashion, and was theprototypefor alldiesel–electric locomotivecontrol systems. In 1914, world's first functional diesel–electric railcars were produced for theKöniglich-Sächsische Staatseisenbahnen(Royal Saxon State Railways) byWaggonfabrik Rastattwith electric equipment fromBrown, Boveri & Cieand diesel engines fromSwiss Sulzer AG.They were classified asDET 1 and DET 2(de.wiki). The first regular used diesel–electric locomotives wereswitcher (shunter) locomotives.General Electric produced several small switching locomotives in the 1930s (the famous "44-tonner"switcher was introduced in 1940) Westinghouse Electric and Baldwin collaborated to build switching locomotives starting in 1929.

In 1929, theCanadian National Railwaysbecame the first North American railway to use diesels in mainline service with two units, 9000 and 9001, from Westinghouse.^[53]

High-speed rail

Although steam and diesel services reaching speeds up to 200 km/h (120 mph) were started before the 1960s in Europe, they were not very successful.https:// lococarriage.org.uk/high_speed_rail.html

The first electrifiedhigh-speed rail Tōkaidō Shinkansenwas introduced in 1964 betweenTokyoandOsakain Japan. Since thenhigh-speed railtransport, functioning at speeds up to and above 300 km/h (190 mph), has been built in Japan, Spain, France, Germany, Italy, the People's Republic of China, Taiwan (Republic of China), theUnited Kingdom,South Korea,Scandinavia,Belgiumand theNetherlands.The construction of many of these lines has resulted in the dramatic decline of short-haul flights and automotive traffic between connected cities, such as the London–Paris–Brussels corridor, Madrid–Barcelona, Milan–Rome–Naples, as well as many other major lines.^{[citation needed]}

High-speed trains normally operate onstandard gaugetracks ofcontinuously welded railongrade-separated right-of-waythat incorporates a largeturning radiusin its design. While high-speed rail is most often designed for passenger travel, some high-speed systems also offer freight service.

Preservation

Since 1980, rail transport has changed dramatically, but a number ofheritage railwayscontinue to operate as part ofliving historyto preserve and maintain old railway lines for services of tourist trains.

Trains

A train is a connected series of rail vehicles that move along the track. Propulsion for the train is provided by a separate locomotive or from individual motors in self-propelled multiple units. Most trains carry a revenue load, although non-revenue cars exist for the railway's own use, such as formaintenance-of-waypurposes. Theengine driver(engineer in North America) controls the locomotive or other power cars, althoughpeople moversand some rapid transits are under automatic control.

Haulage

Traditionally, trains are pulled using a locomotive. This involves one or more powered vehicles being located at the front of the train, providing sufficienttractive forceto haul the weight of the full train. This arrangement remains dominant for freight trains and is often used for passenger trains. Apush–pull trainhas the end passenger car equipped with a driver's cab so that the engine driver can remotely control the locomotive. This allows one of the locomotive-hauled train's drawbacks to be removed, since the locomotive need not be moved to the front of the train each time the train changes direction. Arailroad caris a vehicle used for the haulage of either passengers or freight.

A multiple unit has powered wheels throughout the whole train. These are used for rapid transit and tram systems, as well as many both short- and long-haul passenger trains. Arailcaris a single, self-powered car, and may be electrically propelled or powered by adiesel engine.Multiple units have a driver's cab at each end of the unit, and were developed following the ability to buildelectric motorsand other engines small enough to fit under the coach. There are only a few freight multiple units, most of which are high-speed post trains.

Motive power

Steam locomotivesare locomotives with asteam enginethat provides adhesion.Coal,petroleum,orwoodis burned in afirebox,boiling water in theboilerto create pressurized steam. The steam travels through thesmokeboxbefore leaving via the chimney or smoke stack. In the process, it powers apistonthat transmits power directly through aconnecting rod(US: main rod) and acrankpin(US: wristpin) on thedriving wheel(US main driver) or to acrankon a driving axle. Steam locomotives have been phased out in most parts of the world for economical and safety reasons, although many are preserved in working order byheritage railways.

Electric locomotivesdraw power from a stationary source via anoverhead wireorthird rail.Some also or instead use abattery.In locomotives that are powered by high-voltagealternating current,atransformerin the locomotive converts the high-voltage low-current power to low-voltage high current used in thetraction motorsthat power the wheels. Modern locomotives may usethree-phase AC induction motorsordirect currentmotors. Under certain conditions, electric locomotives are the most powerful traction.^{[citation needed]}They are also the cheapest to run and provide less noise and no local air pollution.^{[citation needed]}However, they require high capital investments both for theoverhead linesand the supporting infrastructure, as well as the generating station that is needed to produce electricity. Accordingly, electric traction is used on urban systems, lines with high traffic and for high-speed rail.

Diesel locomotivesuse a diesel engine as theprime mover.The energy transmission may be eitherdiesel–electric,diesel-mechanical or diesel–hydraulic but diesel–electric is dominant.Electro-diesel locomotivesare built to run as diesel–electric on unelectrified sections and as electric locomotives on electrified sections.

Alternative methods of motive power includemagnetic levitation,horse-drawn,cable,gravity,pneumaticsandgas turbine.

Passenger trains

A passenger train stops at stations where passengers may embark and disembark. The oversight of the train is the duty of aguard/train manager/conductor.Passenger trains are part of public transport and often make up the stem of the service, with buses feeding to stations. Passenger trains provide long-distance intercity travel, daily commuter trips, or local urban transit services, operating with a diversity of vehicles, operating speeds, right-of-way requirements, and service frequency. Service frequencies are often expressed as a number of trains per hour (tph).^[54]Passenger trains can usually be into two types of operation, intercity railway and intracity transit. Whereas intercity railway involve higher speeds, longer routes, and lower frequency (usually scheduled), intracity transit involves lower speeds, shorter routes, and higher frequency (especially during peak hours).^[55] Intercity trainsare long-haul trains that operate with few stops between cities. Trains typically have amenities such as adining car.Some lines also provide over-night services withsleeping cars.Some long-haul trains have been given aspecific name.Regional trainsare medium distance trains that connect cities with outlying, surrounding areas, or provide a regional service, making more stops and having lower speeds.Commuter trainsserve suburbs of urban areas, providing a dailycommutingservice.Airport rail linksprovide quick access from city centres toairports.

High-speed railare special inter-city trains that operate at much higher speeds than conventional railways, the limit being regarded at 200 to 350 kilometres per hour (120 to 220 mph). High-speed trains are used mostly for long-haul service and most systems are in Western Europe and East Asia.Magnetic levitationtrains such as theShanghai maglev trainuse under-riding magnets which attract themselves upward towards the underside of a guideway and this line has achieved somewhat higher peak speeds in day-to-day operation than conventional high-speed railways, although only over short distances. Due to their heightened speeds, route alignments for high-speed rail tend to have broader curves than conventional railways, but may have steeper grades that are more easily climbed by trains with large kinetic energy.

Highkinetic energytranslates to higher horsepower-to-ton ratios (e.g. 20 horsepower per short ton or 16 kilowatts per tonne); this allows trains to accelerate and maintain higher speeds and negotiate steep grades as momentum builds up and recovered in downgrades (reducingcut and filland tunnelling requirements). Since lateral forces act on curves, curvatures are designed with the highest possible radius. All these features are dramatically different from freight operations, thus justifying exclusive high-speed rail lines if it is economically feasible.^[55]

Higher-speed railservices are intercity rail services that have top speeds higher than conventional intercity trains but the speeds are not as high as those in the high-speed rail services. These services are provided after improvements to the conventional rail infrastructure to support trains that can operate safely at higher speeds.

Rapid transitis an intracity system built in large cities and has the highest capacity of any passenger transport system. It is usually grade-separated and commonly built underground or elevated. At street level, smallertramscan be used.Light railsare upgraded trams that have step-free access, their own right-of-way and sometimes sections underground.Monorailsystems are elevated, medium-capacity systems. Apeople moveris a driverless, grade-separated train that serves only a few stations, as a shuttle. Due to the lack of uniformity of rapid transit systems, route alignment varies, with diverse rights-of-way (private land, side of road, street median) andgeometric characteristics(sharp or broad curves, steep or gentle grades). For instance, theChicago 'L'trains are designed with extremely short cars to negotiate the sharp curves in theLoop.New Jersey'sPATHhas similar-sized cars to accommodate curves in the trans-Hudson tunnels. San Francisco'sBARToperates large cars on its routes.^[55]

Freight trains

Freight trains carrycargousingfreight carsspecialized for the type of goods. Freight trains are very efficient, with economy of scale and high energy efficiency.^[56]However, their use can be reduced by lack of flexibility, if there is need of transshipment at both ends of the trip due to lack of tracks to the points of pick-up and delivery. Authorities often encourage the use of cargo rail transport due to its efficiency and to reduce road traffic.^[57]

Container trainshave become widely used in many places for general freight, particularly in North America, wheredouble stackingreduces costs. Containers can easily be transshipped between other modes, such as ships and trucks, and atbreaks of gauge.Containers have succeeded theboxcar(wagon-load), where the cargo had to be loaded and unloaded into the train manually. The intermodalcontainerizationof cargo has revolutionized thesupply chain logisticsindustry, reducing shipping costs significantly. In Europe, thesliding wall wagonhas largely superseded theordinary covered wagons.Other types of cars includerefrigerator cars,stock carsfor livestock andautoracksfor road vehicles. When rail is combined with road transport, aroadrailerwill allowtrailersto be driven onto the train, allowing for easy transition between road and rail.

Bulk handlingrepresents a key advantage for rail transport. Low or even zero transshipment costs combined with energy efficiency and low inventory costs allow trains to handlebulkmuch cheaper than by road. Typical bulk cargo includes coal, ore, grains and liquids. Bulk is transported inopen-topped cars,hopper carsandtank cars.

Infrastructure

Right-of-way

Railway tracks are laid upon land owned or leased by the railway company. Owing to the desirability of maintaining modest grades, in hilly or mountainous terrain rails will often be laid in circuitous routes. Route length and grade requirements can be reduced by the use of alternatingcuttings,bridges and tunnels – all of which can greatly increase the capital expenditures required to develop a right-of-way, while significantly reducing operating costs and allowing higher speeds on longer radius curves. In densely urbanised areas, railways are sometimes laid in tunnels to minimise the effects on existing properties.

Track

Left: Railway turnouts; Right:Chicago Transit Authoritycontrol box guides elevatedChicago 'L'north and southboundPurpleandBrownlinesintersectingwith east and westboundPinkandGreenlines and the loopingOrange lineabove theWellsandLake street intersectionin theloopat anelevated right of way.

Track consists of two parallel steel rails, anchoredperpendicularto members calledsleepers(ties) of timber, concrete, steel, or plastic to maintain a consistent distance apart, orrail gauge.Other variations are also possible, such as "slab track", in which the rails are fastened to a concrete foundation resting on a prepared subsurface.

Rail gauges are usually categorized asstandard gauge(used on approximately 70% of the world's existing railway lines),broad gauge,andnarrow gauge.^[58]In addition to the rail gauge, the tracks will be laid to conform with aloading gaugewhich defines the maximum height and width for railway vehicles and their loads to ensure safe passage through bridges, tunnels and other structures.

The track guides the conical, flanged wheels, keeping the cars on the track without active steering and therefore allowing trains to be much longer than road vehicles. The rails and ties are usually placed on a foundation made of compressed earth on top of which is placed a bed ofballastto distribute the load from the ties and to prevent the track frombucklingas the ground settles over time under the weight of the vehicles passing above.

The ballast also serves as a means of drainage. Some more modern track in special areas is attached directly without ballast. Track may be prefabricated or assembled in place. Byweldingrails together to form lengths ofcontinuous welded rail,additional wear and tear on rolling stock caused by the small surface gap at the joints between rails can be counteracted; this also makes for a quieter ride.

On curves, the outer rail may be at a higher level than the inner rail. This is called superelevation orcant.This reduces the forces tending to displace the track and makes for a more comfortable ride for standing livestock and standing or seated passengers. A given amount of superelevation is most effective over a limited range of speeds.

Points and switches – also known asturnouts– are the means of directing a train onto a diverging section of track. Laid similar to normal track, a point typically consists of afrog(common crossing), check rails and two switch rails. The switch rails may be moved left or right, under the control of the signalling system, to determine which path the train will follow.

Spikes in wooden ties can loosen over time, but split and rotten ties may be individually replaced with new wooden ties or concrete substitutes. Concrete ties can also develop cracks or splits, and can also be replaced individually. Should the rails settle due to soil subsidence, they can be lifted by specialized machinery and additional ballast tamped under the ties to level the rails.

Periodically, ballast must be removed and replaced with clean ballast to ensure adequate drainage. Culverts and other passages for water must be kept clear lest water is impounded by the trackbed, causing landslips. Where trackbeds are placed along rivers, additional protection is usually placed to prevent streambank erosion during times of high water. Bridges require inspection and maintenance, since they are subject to large surges of stress in a short period of time when a heavy train crosses.

Gauge incompatibility

The use of different track gauges in different regions of the world, and sometimes within the same country, can impede the movement of passengers and freight. Often elaborate transfer mechanisms are installed where two lines of different gauge meet to facilitate movement across thebreak of gauge.Countries with multiple gauges in use, such asIndiaandAustralia,have invested heavily to unify their rail networks. China is developing a modernizedEurasian Land Bridgeto move goods by rail to Western Europe.

Train inspection systems

The inspection of railway equipment is essential for the safe movement of trains. Many types ofdefect detectorsare in use on the world's railroads. These devices use technologies that vary from a simplistic paddle and switch toinfraredand laser scanning, and evenultrasonic audio analysis.Their use has avoided many rail accidents over the 70 years they have been used.

Signalling

Bardon Hillbox inEngland(seen here in 2009) is aMidland Railwaybox dating from 1899, although the original mechanical lever frame has been replaced by electrical switches.

Railway signallingis a system used to control railway traffic safely to prevent trains from colliding. Being guided by fixedrailswhich generate low friction, trains are uniquely susceptible to collision since they frequently operate at speeds that do not enable them to stop quickly or within the driver's sighting distance; road vehicles, which encounter a higher level of friction between their rubber tyres and the road surface, have much shorter braking distances. Most forms of train control involve movement authority being passed from those responsible for each section of a rail network to the train crew. Not all methods require the use of signals, and some systems are specific tosingle trackrailways.

The signalling process is traditionally carried out in asignal box,a small building that houses thelever framerequired for the signalman to operate switches and signal equipment. These are placed at various intervals along the route of a railway, controlling specified sections of track. More recent technological developments have made such operational doctrine superfluous, with the centralization of signalling operations to regional control rooms. This has been facilitated by the increased use of computers, allowing vast sections of track to be monitored from a single location. The common method ofblock signallingdivides the track into zones guarded by combinations of block signals, operating rules, and automatic-control devices so that only one train may be in a block at any time.

Electrification

The electrification system provides electrical energy to the trains, so they can operate without a prime mover on board. This allows lower operating costs, but requires large capital investments along the lines. Mainline and tram systems normally have overhead wires, which hang from poles along the line. Grade-separated rapid transit sometimes use a groundthird rail.

Power may be fed asdirect(DC) oralternating current(AC). The most common DC voltages are 600 and 750 V for tram and rapid transit systems, and 1,500 and 3,000 V for mainlines. The two dominant AC systems are15 kVand25 kV.

Stations

Arailway stationserves as an area where passengers can board and alight from trains. Agoods stationis a yard which is exclusively used for loading and unloading cargo. Large passenger stations have at least one building providing conveniences for passengers, such as purchasing tickets and food. Smaller stations typically only consist of aplatform.Early stations were sometimes built with both passenger and goods facilities.^[59]

Platforms are used to allow easy access to the trains, and are connected to each other viaunderpasses,footbridgesandlevel crossings.Some large stations are built asculs-de-sac,with trains only operating out from one direction. Smaller stations normally serve local residential areas, and may have connection to feeder bus services. Large stations, in particularcentral stations,serve as the mainpublic transport hubfor the city, and have transfer available between rail services, and to rapid transit, tram or bus services.

Operations

Ownership

Since the 1980s, there has been an increasing trend to split up railway companies, with companies owning the rolling stock separated from those owning the infrastructure. This is particularly true in Europe, where this arrangement is required by the European Union. This has allowed open access by any train operator to any portion of the European railway network. In the UK, the railway track is state owned, with a public controlled body (Network Rail) running, maintaining and developing the track, while Train Operating Companies have run the trains sinceprivatization in the 1990s.^[60]

In the U.S., virtually all rail networks and infrastructure outside theNortheast corridorare privately owned by freight lines. Passenger lines, primarilyAmtrak,operate as tenants on the freight lines. Consequently, operations must be closely synchronized and coordinated between freight and passenger railroads, with passenger trains often being dispatched by the host freight railroad. Due to this shared system, both are regulated by theFederal Railroad Administration(FRA) and may follow theAREMArecommended practices for track work andAARstandards for vehicles.^[55]

Financing

The main source of income for railway companies is fromticketrevenue (for passenger transport) and shipment fees for cargo.^[61]^[62]Discounts and monthly passes are sometimes available for frequent travellers (e.g.season ticketandrail pass). Freight revenue may be sold per container slot or for a whole train. Sometimes, the shipper owns the cars and only rents the haulage. For passenger transport,advertisementincome can be significant.

Governments may choose to give subsidies to rail operation, since rail transport has fewerexternalitiesthan other dominant modes of transport. If the railway company is state-owned, the state may simply provide direct subsidies in exchange for increased production. If operations have been privatised, several options are available. Some countries have a system where the infrastructure is owned by a government agency or company – with open access to the tracks for any company that meets safety requirements. In such cases, the state may choose to provide the tracks free of charge, or for a fee that does not cover all costs. This is seen as analogous to the government providing free access to roads. For passenger operations, a direct subsidy may be paid to a public-owned operator, orpublic service obligationtender may be held, and a time-limited contract awarded to the lowest bidder.Total EU rail subsidiesamounted to €73 billion in 2005.^[63]

Via Rail Canadaand US passenger rail serviceAmtrakare private railroad companies chartered by their respective national governments. As private passenger services declined because of competition from cars and airlines, they becameshareholdersof Amtrak either with a cash entrance fee or relinquishing their locomotives and rolling stock. The government subsidises Amtrak by supplying start-upcapitaland making up for losses at the end of thefiscal year.^[64]^{[page needed]}

Safety

Some trains travel faster than road vehicles. They are heavy and unable to deviate from the track, and have longer stopping distances. Possible accidents includederailment(jumping the track) and collisions with another train or a road vehicle, or with pedestrians at level crossings, which account for the majority of all rail accidents and casualties. To minimize the risk, the most important safety measures are strict operating rules, e.g.railway signalling,and gates orgrade separationat crossings.Train whistles,bells, orhornswarn of the presence of a train, while trackside signals maintain the distances between trains. Another method used to increase safety is the addition ofplatform screen doorsto separate the platform from train tracks. These prevent unauthorised incursion on to the train tracks which can result in accidents that cause serious harm or death, as well as providing other benefits such as preventing litter build up on the tracks which can pose a fire risk.

On many high-speed inter-city networks, such as Japan'sShinkansen,the trains run on dedicated railway lines without any level crossings. This is an important element in the safety of the system as it effectively eliminates the potential for collision with automobiles, other vehicles, or pedestrians, and greatly reduces the probability of collision with other trains. Another benefit is that services on the inter-city network remain punctual.

Maintenance

As in anyinfrastructureasset, railways must keep up with periodic inspection and maintenance to minimise the effect of infrastructure failures that can disrupt freight revenue operations and passenger services. Because passengers are considered the mostcrucial cargoand usually operate at higher speeds, steeper grades, and higher capacity/frequency, their lines are especially important. Inspection practices includetrack geometry carsor walking inspection. Curve maintenance especially for transit services includes gauging, fastener tightening, and rail replacement.

Rail corrugation is a common issue with transit systems due to the high number of light-axle, wheel passages which result in grinding of the wheel/rail interface. Since maintenance may overlap with operations, maintenance windows (nighttime hours,off-peak hours,altering train schedules or routes) must be closely followed. In addition, passenger safety during maintenance work (inter-track fencing, proper storage of materials, track work notices, hazards of equipment near states) must be regarded at all times. At times, maintenance access problems can emerge due to tunnels, elevated structures, and congested cityscapes. Here, specialised equipment or smaller versions of conventional maintenance gear are used.^[55]

Unlikehighwaysorroad networkswhere capacity is disaggregated into unlinked trips over individual route segments, railway capacity is fundamentally considered a network system. As a result, many components are causes and effects of system disruptions. Maintenance must acknowledge the vast array of a route's performance (type of train service, origination/destination, seasonal impacts), a line's capacity (length, terrain, number of tracks, types of train control), trains throughput (max speeds, acceleration/ deceleration rates), and service features with shared passenger-freight tracks (sidings, terminal capacities, switching routes, and design type).^[55]

Energy

Transport by rail is anenergy-efficient^[67]butcapital-intensive^[68]means of mechanized land transport. The tracks provide smooth and hard surfaces on which the wheels of the train can roll with a relatively low level of friction.

A typical modern wagon can hold up to 113 tonnes (125 short tons) of freight on two four-wheelbogies.The track distributes the weight of the train evenly, allowing significantly greater loads peraxleand wheel than in road transport, leading to greater energy efficiency. Trains have a smaller frontal area in relation to the load they are carrying, which reducesair resistanceand thus energy usage.

In addition, the presence of track guiding the wheels allows for very long trains to be pulled by one or a few engines and driven by a single operator, even around curves, which allows foreconomies of scalein both manpower and energy use; by contrast, in road transport, more than twoarticulationscausesfishtailingand makes the vehicle unsafe.

Energy efficiency

Considering only the energy spent to move the means of transport, and using the example of the urban area ofLisbon,electric trains seem to be on average 20 times more efficient than automobiles for transportation of passengers, if we consider energy spent per passenger-distance with similar occupation ratios.^[69]Considering an automobile with a consumption of around 6 L/100 km (47 mpg_‑imp;39 mpg_‑US) of fuel, the average car in Europe has an occupancy of around 1.2 passengers per automobile (occupation ratio around 24%) and thatone litre of fuelamounts to about 8.8 kWh (32 MJ), equating to an average of 441 Wh (1,590 kJ) per passenger-km. This compares to a modern train with an average occupancy of 20% and a consumption of about 8.5 kW⋅h/km (31 MJ/km; 13.7 kW⋅h/mi), equating to 21.5 Wh (77 kJ) per passenger-km, 20 times less than the automobile.

Usage

Due to these benefits, rail transport is a major form of passenger and freight transport in many countries.^[68]It is ubiquitous in Europe, with an integrated network covering virtually the whole continent. In India, China, South Korea and Japan, many millions use trains as regular transport. In North America, freight rail transport is widespread and heavily used, but intercity passenger rail transport is relatively scarce outside theNortheast Corridor,due to increased preference of other modes, particularly automobiles and airplanes.^[64]^{[page needed]}^[70]However, implementing new and improved ways such as making it easily accessible within neighborhoods can aid in reducing commuters from using private vehicles and airplanes.^[71]

South Africa, northern Africa and Argentina have extensive rail networks, but some railways elsewhere in Africa and South America are isolated lines. Australia has a generally sparse network befitting its population density but has some areas with significant networks, especially in the southeast. In addition to the previously existing east–west transcontinental line in Australia, a line from north to south has been constructed. The highest railway in the world is theline to Lhasa,in Tibet,^[72]partly running over permafrost territory. Western Europe has the highest railway density in the world and many individual trains there operate through several countries despite technical and organizational differences in each national network.

Social and economic impact

Modernization

Historically, railways have been considered central to modernity and ideas of progress.^[73]The process of modernization in the 19th century involved a transition from a spatially oriented world to a time-oriented world. Timekeeping became of heightened importance, resulting in clock towers for railway stations, clocks in public places, and pocket watches for railway workers and travellers. Trains followed exact schedules and never left early, whereas in the premodern era, passenger ships left whenever the captain had enough passengers. In the premodern era, local time was set at noon, when the sun was at its highest; this changed with the introduction of standardtime zones.Printed timetables were a convenience for travellers, but more elaborate timetables, calledtrain orders,were essential for train crews, the maintenance workers, the station personnel, and for the repair and maintenance crews. The structure of railway timetables were later adapted for different uses, such as schedules for buses, ferries, and airplanes, for radio and television programmes, for school schedules, and for factory time clocks.^[74]

The invention of theelectrical telegraphin the early 19th century also was crucial for the development and operation of railroad networks. If bad weather disrupted the system, telegraphers relayed immediate corrections and updates throughout the system. Additionally, most railroads were single-track, withsidingsand signals to allow lower priority trains to be sidetracked and have scheduled meets.

Nation-building

Scholars have linked railroads to successful nation-building efforts by states.^[75]

Model of corporate management

According to historianHenry Adams,a railroad network needed:

the energies of a generation, for it required all the new machinery to be created – capital, banks, mines, furnaces, shops, power-houses, technical knowledge, mechanical population, together with a steady remodelling of social and political habits, ideas, and institutions to fit the new scale and suit the new conditions. The generation between 1865 and 1895 was already mortgaged to the railways, and no one knew it better than the generation itself.^[76]

The impact can be examined through five aspects: shipping, finance, management, careers, and popular reaction.

Shipping freight and passengers

Railroads form an efficient network for shipping freight and passengers across a large national market; their development thus was beneficial to many aspects of a nation's economy, including manufacturing, retail and wholesale, agriculture, and finance. By the 1940s, the United States had an integrated national market comparable in size to that of Europe, but free of internal barriers or tariffs, and supported by a common language, financial system, and legal system.^[77]

Financial system

Financing of railroads provided the basis for a dramatic expansion of the private (non-governmental)financial system.Construction of railroads was far more expensive than factories: in 1860, the combined total of railroad stocks and bonds was $1.8 billion; in 1897, it reached $10.6 billion (compared to a total national debt of $1.2 billion).^[78]

Funding came from financiers in theNortheastern United Statesand from Europe, especially Britain.^[79]About 10 percent of the funding came from the government, particularly in the form of land grants that were realized upon completion of a certain amount of trackage.^[80]The emerging American financial system was based on railroad bonds, and by 1860, New York was the dominant financial market. The British invested heavily in railroads around the world, but nowhere more than in the United States; the total bond value reached about $3 billion by 1914. However, in 1914–1917, the British liquidated their American assets to pay for war supplies.^[81]^[82]

Modern management

Railroad management designed complex systems that could handle far more complicated simultaneous relationships than those common in other industries at the time. Civil engineers became the senior management of railroads. The leading American innovators were theWestern Railroad of Massachusettsand theBaltimore and Ohio Railroadin the 1840s, theErie Railroadin the 1850s, and thePennsylvania Railroadin the 1860s.^[83]

Career paths

The development of railroads led to the emergence of private-sector careers for both blue-collar workers and white-collar workers. Railroading became a lifetime career for young men; women were almost never hired. A typical career path would see a young man hired at age 18 as a shop labourer, be promoted to skilled mechanic at age 24, brakemen at 25, freight conductor at 27, and passenger conductor at age 57. White-collar career paths likewise were delineated: educated young men started in clerical or statistical work and moved up to station agents or bureaucrats at the divisional or central headquarters, acquiring additional knowledge, experience, andhuman capitalat each level. Being very hard to replace, they were virtually guaranteed permanent jobs and provided with insurance and medical care.

Hiring, firing, and wage rates were set not by foremen, but by central administrators, to minimize favouritism and personality conflicts. Everything was done by the book, whereby an increasingly complex set of rules dictated to everyone exactly what should be done in every circumstance, and exactly what their rank and pay would be. By the 1880s, career railroaders began retiring, and pension systems were invented for them.^[84]

Transportation

Railways contribute to social vibrancy and economic competitiveness by transporting multitudes of customers and workers tocity centresandinner suburbs.Hong Konghas recognized rail as "the backbone of thepublic transit system"and as such developed their franchised bus system and road infrastructure in comprehensive alignment with their rail services.^[85]China's large cities such asBeijing,Shanghai,andGuangzhourecognize rail transit lines as the framework and bus lines as the main body to their metropolitan transportation systems.^[86]The JapaneseShinkansenwas built to meet the growing traffic demand in the "heart of Japan's industry and economy" situated on theTokyo-Kobeline.^[87]

Military role

Rail transport can be important for military activity. During the 1860s, railways provided a means for rapid movement of troops and supplies during theAmerican Civil War,^[88]as well as in theAustro-PrussianandFranco-Prussian Wars^[89]Throughout the 20th century, rail was a key element of war plans for rapid militarymobilization,allowing for the quick and efficient transport of large numbers of reservists to their mustering-points, and infantry soldiers to the front lines.^[90]So-calledstrategic railwayswere or are constructed for a primarily military purpose. The Western Front in France duringWorld War Irequired many trainloads of munitions a day.^[91]Conversely, owing to their strategic value, rail yards and bridges in Germany and occupied France were major targets of Allied air raids during World War II.^[92]Rail transport and infrastructure continues to play an important role in present-day conflicts like theRussian invasion of Ukraine,wheresabotage of railways in Belarusandin Russiaalso influenced the course of the war.

Positive impacts

Railways channel growth towards dense cityagglomerationsand along their arteries.^{[citation needed]}This contrasts withhighwayexpansion, indicative of the U.S. transportation policy post-World War II, which instead encourages development ofsuburbsat the periphery of metropolitan areas, contributing to increasedvehicle miles travelled,carbon emissions,development ofgreenfieldspaces, and depletion ofnatural reserves.^{[dubious–discuss]}^{[citation needed]}These arrangements revalue city spaces, localtaxes,^[93]housingvalues, and promotion ofmixed use development.^[94]^[95]

Negative impacts

There has also been some opposition to the development of railway networks. For instance, the arrival of railways andsteam locomotivesto Austria during the 1840s angered locals because of the noise, smell, and pollution caused by the trains and the damage to homes and the surrounding land caused by the engine's soot and fiery embers; and since most travel did not occur over long distances, few people utilized the new line.^[96]

Pollution

A 2018 study found that the opening of theBeijing Metrocaused a reduction in "most of the air pollutants concentrations (PM_2.5,PM₁₀,SO₂,NO₂,and CO) but had little effect on ozone pollution. "^[97]

Modern rail as economic development indicator

Europeandevelopment economistshave argued that the existence of modern rail infrastructure is a significant indicator of a country's economic advancement: this perspective is illustrated notably through theBasic Rail Transportation Infrastructure Index(known as BRTI Index).^[98]

Subsidies

In 2010, annual rail spending in China was ¥840 billion (US$173 billion in 2019), from 2014 to 2017 China had an annual target of ¥800 billion (US$164 billion in 2019) and planned to spend ¥3.5 trillion (US$30 trillion in 2019) over 2016–2020.^[99]

TheIndian Railwaysare subsidized by around ₹260 billion (US$5 billion in 2019), of which around 60% goes to commuter rail and short-haul trips.^[100]

According to the 2017 European Railway Performance Index for intensity of use, quality of service and safety performance, the top tier European national rail systems consists of Switzerland, Denmark, Finland, Germany, Austria, Sweden, and France.^[102]Performance levels reveal a positive correlation between public cost and a given railway system's performance, and also reveal differences in the value that countries receive in return for their public cost. Denmark, Finland, France, Germany, the Netherlands, Sweden, and Switzerland capture relatively high value for their money, while Luxembourg, Belgium, Latvia, Slovakia, Portugal, Romania, and Bulgaria underperform relative to the average ratio of performance to cost among European countries.^[102]

Country	Subsidy in billions of Euros	Year
Germany	17.0	2014^[103]
France	13.2	2013^[104]
Italy	8.1	2009^[105]
Switzerland	5.8	2012^[106]
Spain	5.1	2015^[107]
United Kingdom	4.5	2015^[108]
Belgium	3.4	2008^[101]
Netherlands	2.5	2014^[109]
Austria	2.3	2009^[101]
Denmark	1.7	2008^[101]
Sweden	1.6	2009^[110]
Poland	1.4	2008^[111]
Ireland	0.91	2008^[111]

Russia

In 2016,Russian Railwaysreceived 94.9 billion roubles (around US$1.4 billion) from the government.^[112]

North America

United States

In 2015, funding from theU.S. federal governmentforAmtrakwas around US$1.4 billion.^[113]By 2018, appropriated funding had increased to approximately US$1.9 billion.^[114]

Notes

^According to [Norman Bradbury (November 2002).Face the facts on transport safety(PDF).Railwatch(Report). Archived fromthe original(PDF)on 11 October 2010.], railways are the safest on both a per-mile and per-hour basis, whereasair transportis safe only on a per-mile basis.
^Heilmann evaluated both AC and DC electric transmission for his locomotives, but eventually settled on a design based onThomas Edison's DC system.^[38]

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v t e Public transport
Bus service	Bus driver list Bus rapid transit Charabanc Circle route Cross-city route Express bus Guided bus Intercity bus driver Marshrutka Open top bus Pesero Public light bus Rail replacement bus Share taxi/Taxibus Shuttle bus Transit bus Trolleybus
Rail	Passenger rail terminology glossary Autonomous Rail Rapid Transit Airport rail link Cable car Commuter rail Circle route Cross-city route Elevated railway Funicular Heavy rail Heritage railway Heritage streetcar High-speed rail Higher-speed rail Horsecar Inter-city rail Interurban Light rail Maglev Medium-capacity rail system Monorail Narrow-gauge railway People mover Platform screen doors Railbus Metro/Rapid Transit Rubber-tyred metro Regional rail Street running Suspension railway Tram Tram-train
Vehicles for hire	Auto rickshaw taxi Boda boda Combination bus Cycle rickshaw Demand-responsive transport Microtransit Paratransit Dollar van Dolmuş Gondola Hackney carriage Jeepney Limousine Motorcycle taxi Marshrutka Nanny van Personal rapid transit Pesero Public light bus Pulled rickshaw Share taxi Songthaew Taxi Tuk tuk
Carpooling	Car jockey Flexible carpooling Real-time ridesharing Slugging Vanpool
Ship	Cable ferry Ferry Hovercraft Hydrofoil Ocean liner Vaporetto Water taxi
Cable	Aerial tramway Cable ferry Cable railway Elevator Funicular Gondola lift bicable tricable Inclined elevator
Buildingtransport	Elevator Escalator Moving walkway Inclined elevator
Other transport	Airline Airliner Carsharing Bicycle-sharing Scooter-sharing Elevator Escalator Horse-drawn vehicle Hyperloop Inclined elevator Moving walkway Personal transporter Robotaxi Shweeb Slope car Trackless train Vactrain
Locations	Airport Bus bulb Bus garage Bus lane Bus stand Bus station Bus stop Bus turnout (bus bay) Dry dock Ferry terminal Hangar Harbor Interchange station Kassel kerb Layover Metro station Park and ride Port Queue jump Taxicab stand Train station Tram stop Transit mall Transport hub
Ticketing andfares	Automated fare collection Bus advertising Contract of carriage Dead mileage Exit fare Fare avoidance Fare capping Fare evasion Farebox recovery ratio Free public transport Free travel pass Integrated ticketing Manual fare collection Money train Paid area Penalty fare Proof-of-payment Reduced fare program Smart cards(CIPURSE,Calypso) Ticket machine Transfer Transit pass
Routing	Circle route Cross-city route Network length Non-revenue track Radial route Transport network
Facilities	Checked baggage First class Sleeper Standing passenger Travel class
Scheduling	Bus bunching Clock-face scheduling Headway Night (owl) service On-time performance Public transport timetable Short turn
Politics	Airport security Complete streets Green transport hierarchy Rail subsidies Security Street hierarchy Transit district Transit police Transit-oriented development (TOD) Transportation authority Transportation demand management Transportation planning
Technology and signage	Destination sign Passenger information system Platform display Timetable
Other topics	Boarding Bus rapid transit creep Crush load Destination sign Dwell time Hail and ride Land transport Outline of transport Passenger load factor Public good Request stop Service Sustainable transport Timing point Transit map Transport economics Micromobility
Transport portal

v t e Railwaytrack layouts
Railway track	Single track Passing loop Double track Quadruple track Crossover
Rail sidings	Balloon loop Headshunt Pocket track Refuge siding Rail yard Classification yard
Junctions	Flying junction Level junction Double junction Facing and trailing Grand union Grand circle / roundabout Wye Switch / turnout / points Swingnose crossing Level crossing
Stations	Railway platform Bay Island Side Split Terminal station Balloon loop Spanish solution Cross-platform interchange Interchange station Infill station
Hillclimbing	Horseshoe curve Zig Zag / Switchback Spiral
Track geometry	Track gauge Ruling gradient Minimum curve radius Cant Cant deficiency

v t e Railinfrastructure
Tracks(history)	Axe ties Ballast Baulk road Breather switch Cant Clip and scotch Date nail Fastening system Fishplate Ladder track Minimum radius Profile Tie/Sleeper Transition curve
Trackwork	Balloon loop Classification yard Headshunt Pocket track Junction Gauntlet track Guide bar Passing loop Track gauge dual gauge Rail track tramway track Rail yard Railway electrification overhead lines third rail ground-level power supply Railway turntable Transfer table (traverser) Roll way Siding refuge siding Switch Track geometry Water crane Water trough Wye
Signalling and safety	Anti-trespass panels Block post Buffer stop Catch points Defect detector Derailer Guard rail Interlocking Level crossing Loading gauge Platform screen doors Railway signal Signalling control Structure gauge Signal bridge Tell-tale Train stop Wayside horn
Structures	Coaling tower Motive power depot/Railway workshop Platform Roundhouse Shed for trains for goods Station building clock ghost list Water stop
Types	Industrial Military Private station list

Authority control databases
National	Germany United States France BnF data Czech Republic Latvia Israel
Other	NARA Encyclopedia of Modern Ukraine