Commuter rail orsuburban rail is apassenger rail service that primarily operates within ametropolitan area, connectingcommuters to acentral city from adjacentsuburbs orcommuter towns.[1][2][3] Commuter rail systems can use locomotive-hauled trains or multiple units, using electric or diesel propulsion.[2] Distance charges or zone pricing may be used.
The term can refer to systems with a wide variety of different features and service frequencies, but is often used in contrast torapid transit orlight rail.
Some services share similarities with both commuter rail and high-frequencyrapid transit; examples include GermanS-Bahn in some cities, theRéseau Express Régional (RER) in Paris, theS Lines in Milan, many Japanese commuter systems, theEast Rail line in Hong Kong, and some Australasian suburban networks, such asSydney Trains. Many commuter rail systems share tracks with other passenger services andfreight.
In North America, commuter rail sometimes refers only to systems that primarily operate duringrush hour and offer little to no service for the rest of the day, withregional rail being used to refer to systems that offer all-day service.[4][5][6]
Compared torapid transit (or metro rail), commuter/suburban rail often has lowerfrequency, following a schedule rather than fixed intervals, and fewer stations spaced further apart. They primarily serve lower density suburban areas (non inner-city), generally only having one or two stops in a city's central business district, and often shareright-of-way with intercity orfreight trains.[8] Some services operate only during peak hours and others use fewer departures during off peak hours and weekends. Average speeds are high, often 50 km/h (31 mph) or higher. These higher speeds better serve the longer distances involved. Some services include express services which skip some stations in order to run faster and separate longer distance riders from short-distance ones.[9]
The general range of commuter trains' travel distance varies between 15 and 200 km (9.3 and 124.3 mi), but longer distances can be covered when the trains run between two or several cities (e.g. S-Bahn in theRuhr area of Germany). Distances between stations may vary, but are usually much longer than those of urban rail systems. In city centres the train either has a terminal station or passes through the city centre with notably fewer station stops than those of urban rail systems. Toilets are often available on-board trains and in stations.
Their ability to coexist with freight or intercity services in the sameright-of-way can drastically reduce system construction costs. However, they are frequently built with dedicated tracks within that right-of-way to prevent delays, especially where service densities have converged in the inner parts of the network.
Most such trains run on thelocal standard gauge track. Some systems may run on a narrower or broader gauge. Examples ofnarrow-gauge systems are found in some systems in Sweden, Austria, Switzerland and on theGenoa-Casella line in Italy. Some countries and regions, such asSan Francisco (BART) in the US and theKeikyu system in Japan, usebroad gauge track relative to their national standard.
Metro rail andrapid transit usually cover smaller inner-urban areas within 12 to 20 km (7 to 12 mi) of city centers, with shorter stop spacing, use rolling stocks with larger standing spaces, lower top speed and higher acceleration, designed for short-distance travel. They also run more frequently, to a headway rather than a published timetable and use dedicated tracks (underground or elevated), whereas commuter rail often shares tracks, technology and the legal framework within mainline railway systems, and uses rolling stocks with more seating and higher speed for comfort on longer city-suburban journeys.
However, the classification as a metro or rapid rail can be difficult as both may typically cover a metropolitan area exclusively, run on separate tracks in the centre, and often feature purpose-built rolling stock. The fact that the terminology is not standardised across countries (even across English-speaking countries) further complicates matters. This distinction is most easily made when there are two (or more) systems such as New York'ssubway and theLIRR andMetro-North Railroad, Paris'Métro andRER along withTransilien, Washington D.C.'sMetro along with itsMARC andVRE, London's tube lines of theUnderground and theOverground,Elizabeth line,Thameslink along with other commuter railoperators, Madrid'sMetro andCercanías, Barcelona'sMetro andRodalies, and Tokyo'ssubway and theJR lines along with various privately owned and operated commuter rail systems.
Regional rail usually providesrail services between towns and cities, rather than purely linking major population hubs in the wayinter-city rail does. Regional rail operates outside major cities. Unlike Inter-city, it stops at most or all stations between cities. It provides a service between smaller communities along the line that are often byproducts ofribbon developments, and also connects with long-distance services at interchange stations located at junctions, terminals, or larger towns along the line. Alternative names are "local train" or "stopping train". Examples include the formerBR'sRegional Railways, France'sTER (Transport express régional),[10] Germany'sRegionalexpress andRegionalbahn, and South Korea'sTonggeun andMugunghwa-ho services.[11]
In some European countries, the distinction between commuter trains and long-distance/intercity trains is subtle, due to the relatively short distances involved. For example, so-called "intercity" trains in Belgium and the Netherlands carry many commuters, while their equipment, range, and speeds are similar to those of commuter trains in some larger countries.
The United Kingdom has a privatised rail system, with different routes and services covered by different private operators. The distinction between commuter and intercity rail is not as clear as it was before privatisation (when InterCity existed as a brand of its own), but usually it is still possible to tell them apart. Some operators, for exampleThameslink, focus solely on commuter services. Others, such asAvanti West Coast andLNER, run solely intercity services. Others still, such asGWR andEMR, run a mixture of commuter, regional and intercity services. Some of these operators use different branding for different types of service (for example EMR brands its trains as either "InterCity", "Connect" for London commuter services, and "Regional") but even for those operators that do not, the type of train, amenities offered, and stopping pattern, usually tell the services apart.
Russian commuter trains, on the other hand, frequently cover areas larger than Belgium itself, although these are still short distances by Russian standards. They have a different ticketing system from long-distance trains, and in major cities they often operate from a separate section of the train station.
Some consider "inter-city" service to be that which operates as an express service between two main city stations, bypassing intermediate stations. However, this term is used in Australia (Sydney for example) to describe the regional trains operating beyond the boundaries of the suburban services, even though some of these "inter-city" services stop all stations similar to German regional services. In this regard, the German service delineations and naming conventions are clearer and better used for academic purposes.
The high-speed services linkingZurich,Bern andBasel inSwitzerland (200 km/h (120 mph)) have brought the Central Business Districts (CBDs) of these three cities within 1 hour of each other. This has resulted in unexpectedly high demand for new commuter trips between the three cities and a corresponding increase in suburban rail passengers accessing the high-speed services at the main city-centre stations (Hauptbahnhof). TheRegional-Express commuter service betweenMunich andNuremberg in Germany runs at 200 km/h (120 mph) on the 300 km/h (186 mph)Nuremberg–Ingolstadt high-speed railway.
InGreat Britain, theHS1 domestic services between London and Ashford runs at a top speed of 225 km/h, and in peak hours the trains can be full with commuters standing.
TheAthens Suburban Railway in Greece consists of five lines, 4 of which are electrified. TheKiato–Piraeus line and theAigio–Airport lines reach speeds of up to 180 km/h (112 mph). TheAthens–Chalcis line is also expected to attain speeds of up to 200 km/h (124 mph) upon upgrading of the SKA–Oinoi railway sector. These lines also have many daily commuters, with the number expected to rise even higher upon full completion of theAcharnes Railway Center.
Commuter/suburban trains are usually optimized for maximum passenger volume, in most cases without sacrificing too much comfort andluggage space, though they seldom have all the amenities of long-distance trains. Cars may be single- ordouble-level, and aim to provide seating for all. Compared to intercity trains, they have less space, fewer amenities and limited baggage areas.
Commuter rail trains are usually composed ofmultiple units, which are self-propelled, bidirectional, articulated passenger rail cars with driving motors on each (or every other)bogie. Depending on local circumstances and tradition they may be powered either bydiesel engines located below the passenger compartment (diesel multiple units) or by electricity picked up fromthird rails oroverhead lines (electric multiple units). Multiple units are almost invariably equipped with control cabs at both ends, which is why such units are so frequently used to provide commuter services, due to the associated short turn-around time.
Locomotive hauled services are used in some countries or locations. This is often a case of asset sweating, by using a single large combined fleet for intercity and regional services. Loco hauled services are usually run inpush-pull formation, that is, the train can run with the locomotive at the "front" or "rear" of the train (pushing or pulling). Trains are often equipped with a control cab at the other end of the train from the locomotive, allowing the train operator to operate the train from either end. The motive power for locomotive-hauled commuter trains may be either electric ordiesel–electric, although some countries, such as Germany and some of the former Soviet-bloc countries, also use diesel–hydraulic locomotives.
In the US and some other countries, a three-and-two seat plan is used. Middle seats on these trains are often less popular because passengers feel crowded and uncomfortable.[15][16]
In Japan, South Korea and Indonesia, longitudinal (sideways window-lining) seating is widely used in many commuter rail trains to increase capacity in rush hours. Carriages are usually not organized to increaseseating capacity (although in some trains at least one carriage would feature more doors to facilitate easier boarding and alighting and bench seats so that they can be folded up during rush hour to provide more standing room) even in the case of commuting longer than 50 km and commuters in theGreater Tokyo Area,Seoul metropolitan area, andJabodetabek area have to stand in the train for more than an hour.
In Japan, commuter rail systems have extensive network and frequent service and are heavily used. In many cases, Japanese commuter rail is operationally more like a typical metro system (frequent trains, an emphasis onstanding passengers, short station spacings) than it is like commuter rail in other countries. Japanese commuter rail commonly interline with city center subway lines, with commuter rail trains continuing into the subway network, and then out onto different commuter rail systems on the other side of the city. Many Japanese commuter systems operate various stopping patterns to reduce the travel time to distant locations, often using stationpassing loops instead of dedicated express tracks. It is notable that the larger Japanese commuter rail systems are owned and operated by for-profitprivate railway companies, without public subsidy.
East Japan Railway Company operates a large suburban train network inTokyo with various lines connecting the suburban areas to the city center. While theYamanote Line,Keihin Tohoku Line,Chūō–Sōbu Line services arguably are more akin torapid transit with frequent stops, simple stopping patterns (relative to other JR East lines) no branching services and largely serving the inner suburbs; other services along theChūō Rapid Line,Sōbu Rapid Line/Yokosuka Line,Ueno–Tokyo Line,Shōnan–Shinjuku Line etc. are mid-distance services from suburban lines in the outer reaches of Greater Tokyo through operating into these lines to form a high frequency corridor though central Tokyo.
Most of the trains on theMeitetsu network through operate into a high frequency trunk line on theMeitetsu Nagoya Main Line branching out to other lines on the other side ofNagoya.
The twoMTR lines which are owned and formerly operated by theKowloon-Canton Railway Corporation (East Rail line andTuen Ma line which is integrated from the formerWest Rail line andMa On Shan line in 2021), then the"KCR"), and MTR's ownTung Chung line connect the new towns inNew Territories and the city centreKowloon together with frequent intervals, and some New Territories-bound trains terminate at intermediate stations, providing more frequent services in Kowloon and the towns closer to Kowloon. They use rolling stocks with a faster maximum speed and have longer stop spacing compared to other lines which only run in the inner urban area, but in order to maximise capacity and throughput, these rolling stocks have longitudinal seatings, 5 pairs of doors in each carriage with large standing spaces like the urban lines, and run as frequent as well. Most of the sections of these four lines are overground and some sections of the East Rail Line share tracks with intercity trains tomainland China. The three KCR lines are integrated into the MTR network since 2008 and most passengers do not need to exit and re-enter the system through separate fare gates and purchase separate tickets to transfer between such lines and the rest of the network (the exceptions are between the Tuen Ma line'sEast Tsim Sha Tsui station and the Tsuen Wan line'sTsim Sha Tsui station.
In South Korea, theSeoul Metropolitan Subway includes a total of 22 lines, and some of its lines are suburban lines. This is especially the case for lines operated byKorail, such as theGyeongui-Jungang Line, theGyeongchun Line, theSuin-Bundang Line, or theGyeonggang Line. Even some lines not operated by Korail, such as theAREX Line, theSeohae Line or theShinbundang Line mostly function as commuter rail. Lastly, even for the "numbered lines" (1–9) of the Seoul Metropolitan Subway which mostly travel in the dense parts of Seoul, some track sections extend far outside of the city, and operate large sections at ground level, such as on theLine 1,Line 3 andLine 4. In Busan, theDonghae Line, while part of theBusan Metro system, mostly functions as a commuter rail line.
Chennai suburban railwayKolkata Suburban Railway is the largest suburban railway network in India.
In India, commuter rail systems are present in major cities and form an important part of people's daily lives.Mumbai Suburban Railway, the oldest suburban rail system in Asia, carries more than 7.24 million commuters on a daily basis which constitutes more than half of the total daily passenger capacity of the Indian Railways itself.Kolkata Suburban Railway, one of the largest suburban railway networks in the world, consists of more than 450 stations and carries more than 3.5 million commuters per day. TheChennai Suburban Railway along with theChennai MRTS, also covers over 300 stations and carries more than 2.5 million people daily to different areas inChennai and its surroundings. Other commuter railways in India include theHyderabad MMTS,Delhi Suburban Railway,Pune Suburban Railway andLucknow-Kanpur Suburban Railway.
In 2020, Government of India approvedBengaluru Suburban Railway to connectBengaluru and its suburbs. It will be unique and first of its kind in India as it will have metro like facilities and rolling stock.
In Israel, theIsrael Railways is the largest commuter rail system in the country, serving the Northern, Tel Aviv, Central, Jerusalem, and Sourthern. It connects the Jerusalem and Tel Aviv center with surrounding cities and sub-urbans in their regions.[19]
Major metropolitan areas in most European countries are usually served by extensive commuter/suburban rail systems. Well-known examples includeBG Voz inBelgrade (Serbia),S-Bahn in Germany, Austria and German-speaking areas of Switzerland,Proastiakos in Greece,RER in France and Belgium, Servizio ferroviario suburbano in Italy,Cercanías andRodalies (Catalonia) in Spain,CP Urban Services in Portugal,Esko inPrague andOstrava (Czech Republic),HÉV inBudapest (Hungary) andDART inDublin (Ireland).
TheElizabeth line runs on a 22-kilometre (14-mile) east–west twin tunnel under central London (Crossrail project) as its central core section.
Thameslink brings together several branches from northern and southern suburbs and satellite towns in to a high frequency central tunnel underneath London.
TheLondon Overground, by contrast, skirts through the inner suburbs with lines mostly independent of each other, although there are several branches. TheWatford DC line, partly shared with underground trains, uses third rail, but parallels a main line using overhead wires. TheEast London line andNorth London line run at metro-like frequencies in inner London, which make them nearly indistinguishable from metro systems apart from the fact that the tracks are shared with freight trains.
TheMerseyrail network inLiverpool consists of two commuter rail routes powered by third rail, both of which branch out at one end. At the other, theNorthern line continues out of the city centre to a mainline rail interchange, while theWirral line has a city-centre loop.
TheTyneside Electrics system inNewcastle upon Tyne existed from 1904 to 1967 using DC third rail.British Rail did not have the budget to maintain the ageing electrification system. TheRiverside Branch was closed, while the remaining lines were de-electrified. 13 years later, they were re-electrified using DC overhead wires, and now form theTyne & Wear Metro Yellow Line.
TheRéseau express régional d'Île-de-France (RER) is a commuter rail network in the agglomeration of Paris. In the centre the RER has high frequency underground corridors where several suburban branches feed similar to arapid transit system.
Commuter rail systems inGerman-speaking regions are calledS-Bahn. While in some major cities S-Bahn services run on separate lines exclusively other systems use the existing regional rail tracks.
Randstadspoor is a network ofSprinter train services in and around the city ofUtrecht in the Netherlands. For the realisation of this network, new stations were opened. Separate tracks have been built for these trains, so they can call frequently without disturbing high-frequent Intercity services parallel to these routes.[20] Similar systems are planned forThe Hague andRotterdam.
In Sweden, electrified commuter rail systems known asPendeltåg are present in the cities ofStockholm andGothenburg. TheStockholm commuter rail system, which began in 1968, shares railway tracks with inter-city trains and freight trains, but for the most part runs on its own dedicated tracks. It is primarily used to transport passengers from nearby towns and other suburban areas into the city centre, not for transportation inside the city centre. TheGothenburg commuter rail system, which began in 1960, is similar to the Stockholm system, but does fully share tracks with long-distance trains.
In Norway, theOslo commuter rail system is from 2022 more limited but the remaining commuter lines go on tracks mostly not much used by other trains. From 2022 several lines with hourly frequency and travel times to endpoints of over one hour are redefined as regional trains. Before 2022 Oslo had the largest commuter rail system in the Nordic countries in terms of line lengths and number of stations. AlsoBergen,Stavanger andTrondheim have commuter rail systems. These have only one or two lines each and they share tracks with other trains.
In theautonomous community ofCatalonia, and unlike the rest of Spain, the commuter service is not managed byRenfe Operadora.[21] Since 2010, theGovernment of Catalonia has managed all the regular commuter services with the "transfer ofRodalies".[22] There are two companies that manage the Catalan commuter network:
Rodalies de Catalunya, which after the transfer at the beginning of 2010 when, due to the "Catalan rail chaos" of 2007,[23][24] theSpanish government promised to transfer the Renfe commuter service to theGeneralitat,[25] although it does not deal with the entire service; After the transfer, responsibilities for the commuter trains were divided into three parts: theGeneralitat (management, regulation, planning, coordination and inspection of services and activities and power to charge),Renfe (train operator and its maintenance), andAdif (owner of the railway infrastructure).[26] Lines R1, R2, R2 Nord, R2 Sud, R3 (toSant Quirze de Besora, from there toPuigcerdà orLa Tor de Querol it is considered a regional route), R4, R7 and R8 run through Rodalies de Catalunya, all onIberian gauge (1668 mm).
Ferrocarrils de la Generalitat de Catalunya (FGC) is the railway company responsible for theVallès,Llobregat-Anoia andLleida-La Pobla de Segur lines.[27] This company is mainly in charge of metro and suburban lines, although it also has five commuter lines spread over two lines, four on the Llobregat-Anoia line (R5, R50, R6, R60) onmetre-gauge (1000 mm)[28] and a single line on the Lleida-La Pobla de Segur line (RL1) onIberian gauge (1668 mm).[29] FGC is in charge of the entire service, unlike Rodalies de Catalunya, which is not in charge of either the trains or the infrastructure.
Since 2024, theGovernment of Catalonia has full control of the currentR12 regional line and it is now owned by theFGC.[30] It will eliminate the current line and replace it with the new commuter lines RL3 and RL4, towardsCervera andManresa fromLleida respectively.
In Poland, commuter rail systems exist inTricity,Warsaw,Kraków (SKA) andKatowice (SKR). There is also a similar system planned inWrocław andSzczecin.[31] The terms used are "Szybka Kolej Miejska" (fast urban rail) and "kolej aglomeracyjna" (agglomeration rail). These systems are:
Łódzka Kolej Aglomeracyjna is located in the center of Poland connecting satellite towns in and aroundŁódź. It also operates some trains between Łódź and Warsaw.
TheProastiakos (Greek:Προαστιακός; "suburban") isGreece'ssuburban railway (commuter rail) services, which are run byTrainOSE, on infrastructure owned by theHellenic Railways Organisation (OSE). There are three Proastiakos networks, servicing the country's three largest cities:Athens,Thessaloniki andPatras. In particular, theAthenian network is undergoing modifications to completely separate it from mainline traffic, by re-routing the tracks via a tunnel underneath the city center. A similar project is planned for thePatras network, whereas a new line is due to be constructed for theThessalonian network.
In Romania, the first commuter trains were introduced in December 2019. They operate betweenBucharest and Funduea orBuftea.
BG Voz is an urban rail system that serves Belgrade. It currently has only two routes, with plans for further expansion. Between the early 1990s and mid-2010s, there was another system, known asBeovoz, that was used to providemass-transit service within the Belgrademetropolitan area, as well as to nearby towns, similarly toRER in Paris. Beovoz had more lines and far more stops than the current system. However, it was abandoned in favor of more accurate BG Voz, mostly due to inefficiency. While current services rely mostly on the existing infrastructure, any further development means furthering capacities (railways expansion and new trains). Plans for further extension of system include another two lines, one of which should reachBelgrade Nikola Tesla Airport.
In Russia, Ukraine and some other countries of the formerSoviet Union, electrical multiple unit passenger suburban trains calledElektrichka are widespread. The first such system in Russia is the Oranienbaum Electric Line inSt. Petersburg. In Moscow the Beskudnikovskaya railway branch existed between the 1940s and 1980s. The trains that shuttled along it did not go to the main lines, so it was a city transport. Today there are theMoscow Central Circle and theMoscow Central Diameters.
In the United States, Canada, Costa Rica, El Salvador and Mexico regional passenger rail services are provided by governmental or quasi-governmental agencies, with the busiest and most expansive rail networks located in the Northeastern US, California, and Eastern Canada. Most North American commuter railways utilizediesel locomotive propulsion, with the exception of services in New York City, Philadelphia, Chicago, Denver, San Francisco, and Mexico City; New York's commuter rail lines use a combination of third rail and overhead wire power generation, while Chicago only has two out of twelve services that are electrified. Many newer and proposed systems in Canada and the United States are often geared to serving peak-hour commutes as opposed to the all-day systems of Europe, East Asia, and Australia.
Metra, serving northeast Illinois (Chicago) andKenosha, Wisconsin. The network consists of 11 services, of which only theElectric District service runs on tracks exclusively used for passenger traffic.
Denver'sRTD four electrified commuter rail lines – theA,B,G andN Lines, run on segregated tracks. In its entirety the system combines elements oftram-train and commuter rail.
Another example isCompanhia Paulista de Trens Metropolitanos (CPTM) inGreater São Paulo,Brazil. CPTM has 94 stations with seven lines, numbered starting on 7 (the lines 1 to 6 and the line 15 belong to theSão Paulo Metro), with a total length of 273 kilometres (170 mi). Trains operates at high frequencies on tracks used exclusively for commuter traffic. InRio de JaneiroSuperVia provides electrified commuter rail services.
The five major cities in Australia have suburban railway systems in their metropolitan areas. These networks have frequent services, with frequencies varying from every 10 to every 30 minutes on most suburban lines, and up to 3–5 minutes in peak on bundled underground lines in the city centres of Sydney, Brisbane, Perth and Melbourne. The networks in each state developed from mainline railways and have never been completely operationally separate from long distance and freight traffic, unlikemetro systems. The suburban networks are almost completely electrified.
The main suburban rail networks in Australia are:
TheSydney Trains suburban rail network consists of nine lines converging in the undergroundCity Circle with frequencies as high as three minutes in this section, 5–10 minutes at most major stations all day and 15 minutes at most minor stations all day.
Melbourne's rail network features sixteen electrified commuter rail lines traversing the city centre in the undergroundCity Loop providing a metro-like service in the central core. A second underground core is under construction, as theMetro Tunnel project.V/Line operates some commuter services between Melbourne and surrounding towns, as well as between Melbourne and some locations within the Melbourne metropolitan area.
Commuter rail services inBrisbane are provided under theQueensland Rail City network brand, featuring twelve electrified lines converging in the city centre.Cross River Rail is an under construction underground cross-city tunnel to relieve pressure on this network.
This sectionpossibly containsoriginal research. Where are the sources that confirm this is an actual type of transit system? Where are the references that confirm each example is actually what is stated here? Pleaseimprove it byverifying the claims made and addinginline citations. Statements consisting only of original research should be removed.(June 2023) (Learn how and when to remove this message)
Hybridurban-suburban rail systems exhibiting characteristics of both rapid transit and commuter rail serving ametropolitan region are common in German-speaking countries, where they are known asS-Bahn. Other examples include:Lazio regional railways inRome, theRER in France and theElizabeth line,London UndergroundMetropolitan line,London Overground andMerseyrail in the UK. Comparable systems can be found in Australia such asSydney Trains andMetro Trains Melbourne, and in Japan with many urban and suburban lines operated by JR East/West and third-party companies running at metro-style frequencies. In contrast, comparable systems of this type are generally rare in the United States and Canada, where peak hour frequencies are more common.
In Asia, the construction of higher speed urban-suburban rail links has gained traction in various countries, such as in India, with theDelhi RRTS, in China, with thePearl River Delta Metropolitan Region intercity railway, and in South Korea, with theGreat Train eXpress system. These systems usually run on dedicated elevated or underground tracks for most of their route and have features comparable toHigher-speed rail.
^Spieler, Christof (24 Aug 2021).Trains, Buses, People, Second Edition: An Opinionated Atlas of US and Canadian Transit. Island Press. p. 54.ISBN9781642832136.