Railway platform height is the built height – above top of rail (ATR) – of passenger platforms at stations. A connected term is train floor height, which refers to the ATR height of the floor of rail vehicles. Worldwide, there are many, frequently incompatible, standards for platform heights and train floor heights. Where raised platforms are in use, train widths must also be compatible, in order to avoid both large gaps between platforms and trains and mechanical interference liable to cause equipment damage. Differences in platform height (and platform gap) can pose a risk for passenger safety. Differences between platform height and train floor height may also make boarding much more difficult, or impossible, for wheelchair-using passengers and people with other mobility impairments, increasing station dwell time as platform or staff are required to deploy ramps to assist boarding. Platform ramps, steps, and platform gap fillers together with hazard warnings such as "mind the gap" are used to reduce risk and facilitate access. Platform height affects the loading gauge (the maximum size of train cars), and must conform to the structure gauge physical clearance specifications for the system. Tracks which are shared between freight and passenger service must have platforms which do not obstruct either type of railroad car. To reduce construction costs, the platforms at stations on many railway systems are of low height, making it necessary for passenger cars to be equipped with external steps or internal stairs allowing passengers access to and from car floor levels. When railways were first introduced in the 19th century, low platforms were widely used from the 1880s, especially in rural areas, except in the United Kingdom. Over the years, raised platforms have become far more widespread, and are almost universal for high-speed express routes and universal in cities on commuter and rapid transit lines. Raised platforms on narrow gauge railways can prevent track gauge conversion to standard gauge or broad gauge.

Height categories

Buses, trams, trolleys, and railway passenger cars are divided into several typical categories. These are floor heights. The platforms can be much lower, overcome by onboard staircases.

Africa

Algeria

Typical Algerian platforms are 550 mm above rail.

Kenya

The SGR platforms are two standard heights of 300 mm and 1250 mm above rail heads. The meter gauge platforms are 1100 mm.

Asia

China

China Railway platforms are classified into the following categories of "low" 380 mm, "medium" 550 mm, "high" 760 mm and "ultra high" 1250 mm (latter 2 for most new and rebuilt platforms). Areas adjacent to broad gauge countries/regions, such as Xinjiang and Inner-Mongolia, are still equipped with low platforms. Under the concession period since late 2016, platforms on the southeastern corridor from Shenzhen to Ruili to be 1250 mm ATR, whereas the northern-, central-, and western-Chinese platforms to be 380 mm ATR, are recommended. Most CRH platforms are 1,250 mm above top of rail, with the remainders being 760 mm. The proposed 5 ft and 1520 mm gauge railways (Russian gauge) Rail North China platforms will be 200 mm above rails.

Hong Kong

Hong Kong's railway network consists of the local MTR network (including the former KCR), Hong Kong Tramways, and the Hong Kong section of the XRL high-speed line.

MTR network

Platforms on the MTR are 1250 mm above the rail for the Tung Chung line and Airport Express, collectively known as the Airport Railway lines. The height of platforms on the Disneyland Resort line and the urban lines are 1100 mm. The urban lines include the Tsuen Wan line, Kwun Tong line, Tseung Kwan O line, Island line, and South Island line.

Former KCR network

All platforms on the East Rail line and Tuen Ma line are 1066.8 mm above rail heads. The light rail system uses a platform height of 910 mm above rail level.

High-speed rail line

Trains at Hong Kong West Kowloon railway station travel along the XRL on China's high-speed rail system and so must be compliant with the platform height standard of 1250 mm above the rail.

India

There are two standard heights of platforms in India: 200 mm and 760 mm.

Indonesia

There are three standard heights of the platforms, 180 mm (low), 430 mm (medium), and 1000 mm (high) above rail heads. Most railway stations in Indonesia use low platforms.

Iran

Iran's platforms are 380 mm, 550 mm and 760 mm. Like in China, areas adjacent to broad gauge countries/regions such as the eastern regions such as around Mashhad and Zahedan, still equipped low platforms.

Israel

Israel Railways platforms fall in the range between 760 mm to 1060 mm above top of rail.

Japan

The Japanese National Railways (JNR) for many years used a triple-standard for its conventional (Cape gauge) lines: However, increasing electrification and the phasing-out of locomotive traction in favor of multiple units has made the distinction a matter of historical, rather than practical relevance. Recently, at Japan Railways Group stations in urban centers such as Tokyo and Osaka, whose lines were the earliest to be electrified, 1100 mm is the norm and lower-level platforms are generally raised to this height during station improvements or refurbishment. Elsewhere, such as Hokkaido and the Tohoku/Hokuriku region of Honshu, 920 mm – and even 760 mm platforms are still commonplace. As this represents a potential obstacle when boarding modern commuter trains, workarounds such as a step built into the floor of area-specific trainsets are often employed. Nevertheless, with accessibility becoming a greater concern as Japan's population ages, raising the level of the platform itself (in tandem with other improvements such as elevators and escalators) is seen as the most practical solution. In at least one case, with the E721 series EMU used on JR East lines in the Tohoku region, the floor of the train itself is lowered to be nearly level to existing 920 mm platforms. This makes level boarding feasible at many stations (and boarding less of a hassle at stations with the lowest 760 mm platforms). However, this (along with a different standard of electrification) also makes through service southward to Tokyo impossible, and prevents them from running on certain through lines, such as the Senseki-Tohoku Line, since the Senseki Line portion uses the higher 1100 mm platforms (and DC electrification). In contrast to the above standards, the standard gauge Shinkansen (Bullet Train) has, since its original inception, used only 1250 mm platforms. However, exceptions from this include the "Mini-Shinkansen" Yamagata Shinkansen and Akita Shinkansen lines, which use 1100 mm platforms to maintain compatibility with conventional JR trainsets. Most standard gauge non-JR commuter railways, such as Kintetsu Nara Line and Keisei Line, use 1250 mm platforms.

North Korea

North Korea's platforms are standardized at 1250 mm only. In there, 1250 mm is the norm, lower-level platforms are already raised to this height.

South Korea

Korail adopted 550 mm high platforms to operate KTX. Typically, older platforms are lower than 500 mm. For metro trains, higher platforms which height after 1135 mm are used. Nuriro trains are using mechanical steps to allow both type of platforms. Korail has a long-term plan to change platform standards to higher platforms; both KTX-Eum and EMU-320 are designed to use higher platforms.

Philippines

There are various platform heights for railway lines in the Philippines. For heavy rail and commuter rail systems such as the LRT Line 2 and the PNR Metro Commuter Line, most stations are generally set at 1100 mm. For the LRT Line 1 and MRT Line 3 which use light rail vehicles, the platform heights are at 620 mm and 920 mm, respectively. Future train lines such as the Metro Manila Subway and the North–South Commuter Railway will use the same heavy rail standard at 1100 mm, while the PNR South Long Haul's platform height will be the Chinese standard of 1250 mm. Previously, the Philippine National Railways had lower platforms prior to the 2009 reconstruction of its network. Some stations such as Santa Mesa have its 200 mm curb height platforms still intact as of 2020, while others such as Naga and EDSA have 760 mm platforms built during the early 2000s.

Taiwan

Taiwan high-speed rail platforms are 1250 mm above rail. In Taiwan, Taiwan Railways Administration's platforms were 760 mm tall and passengers must take two stair steps to enter the train. In 2001, however, the platforms were raised to 960 mm, cutting the steps needed to one. Between 2016 and 2020, platforms were again raised to 1150 mm, and the unnecessary gap on trains were filled in.

Thailand

Old railway platforms are usually less than 500 mm (20 in) in height. New platforms along double tracking projects, red line projects, and metro stations are built at 1100 mm height. Bang Bamru railway station is built with both high and low platforms.

Eurasia

Kazakhstan

In Kazakhstan, only Astana Nurly Jol station and Russian Railway's Petropavlovsk station have 550 mm platforms. Almost everywhere else, the platforms are 200 mm above top of rail.

Russia

As of late 2015, there are three standard heights of platforms, which include: In some urban areas, such as Moscow and St Petersburg, served only by local traffic, use 1100 mm platforms for direct-current electric multiple units. Elsewhere, 550 mm and even 200 mm platforms are almost commonplace. In some cases, such as VR Sm4 of Finland, the floor of the train itself lowered to be nearly level to 550 mm platforms. This makes level boarding feasible at some stations (and boarding less of a hassle at stations with the lowest 200 mm platforms). The proposed Indian gauge Indo-Siberian railways platforms will be 200 mm above top of rail.

Turkey

In Turkey, the standard platform height for commuter railways is 1050 mm and for mainline & high-speed railways it's 550 mm.

Europe

European Union

The European Union Commission issued a TSI (Technical Specifications for Interoperability) on 30 May 2002 (2002/735/EC) that sets out standard platform heights for passenger steps on high-speed rail. These standard heights are 550 and 760 mm. There are special cases: 840 mm for the Netherlands, 915 mm for Great Britain, and 915 mm for Ireland.

Broad-gauge railways

The proposed (Russian gauge) railways (e.g. Arctic Railway and Košice–Vienna broad-gauge line) for Sweden and Norway, 200 mm and 550 mm for Poland and Slovakia, and 380 mm for Germany and Austria.

Channel Tunnel

Platforms for Eurotunnel Shuttle are 1100 mm above rails.

Rail Baltica

The European standard gauge Rail Baltica II platforms will be 760 mm above rails.

Belgium

Belgium has been using mixed type of platform heights (due to the age of the network, and the different companies running it before 1923). As of 2017 the most common platform heights for small stop places and stations are low platform heights of 280 mm. There is a plan to comply with the European TSI by raising all low platform heights to one of the European Standard Heights. Most stations will by then be equipped with 550 mm platforms, and direct current EMUs dedicated platforms will be upgraded in their final version to 760 mm. Some stations, or stopping points, already having 760 mm platform heights will keep the platforms at these heights.

Finland

In Finland, the current standard platform height is 550 mm. Platforms built to the older standard are 265 mm above top of rail. The sole exception on the national railway network is the Nikkilä halt which has a platform height of 400 mm (15.8 in).

Germany

Germany's EBO standard specifies an allowable range between 380 mm and 960 mm. This does not include light rail systems that follow the BOStrab standard, with newer metro lines to use low-floor trams which have a usual floor height of 300 to 350 mm so that platforms are constructed as low as 300 mm in accordance with BOStrab that requires the platform height not to be higher than the floor height. The traditional platforms had a very diverse height as the nationwide railway network is a union of earlier railway operators. Prior to followed by the European TSI standard the EBO standard requires that new platform construction be at a regular height of 760 mm. The TSI standard of 550 mm height, historically common in the East, is widely used on regional lines. Only the S-Bahn suburban rail systems had a higher platform height and these are standardized on 960 mm.

Ireland

While older platforms on the Dublin and Kingstown Railway were at lower levels, all platforms are now 915mm above rail and all new platforms are being built at that level. Amongst other work, there is an ongoing program of platform renewal. Both of Ireland's railway companies (Irish Rail in the Republic of Ireland and Northern Ireland Railways in Northern Ireland) have had some derogations from EU standards as their mainline rail systems, while connected to each other, are not connected to any other system. The electric DART fleet has carriage floors at 1067 mm above top of rail creating a step of 152 mm, while the diesel fleet is typically one step (150 to 200 mm) higher than the platform. On Dublin's Luas tram system, platforms are approximately 280 mm above rail. Tram floors are at the same height, but have internal steps over the bogies.

Luxembourg

The 760 mm platforms for the Namur-Luxembourg line. The remainder of the network, the platforms are 380 mm above rails.

Netherlands

European Commission decision 2002/735/EC which concerns trans-European interoperability for high-speed rail specifies that rolling stock be built for operational suitability platform height of 840 mm. Dutch infrastructure maintainer ProRail has committed to upgrading all stations to 760 mm platform height.

Poland

Typical platforms in Poland are 760 mm high. In some rural or urban/suburban areas (e.g. around Warsaw) platforms used by local traffic are lower or higher (550 to 1060 mm). All newly built platforms are 550 or 760 mm high.

Spain

While older platforms in Spain are lower than the rest of Europe, many platforms are now 680 mm above rail. Following track gauge conversion from Iberian gauge to standard gauge, platforms to be raised to 1250 mm for new regional trainsets.

Sweden

Sweden has generally 380 to 580 mm platforms for mainline trains. Stockholm Commuter Rail has almost always its own platforms at 730 mm height which allows stepless trains of type X60. The Arlanda Express service has 1150 mm platform height with floor at platform level. They have their own platforms and trains, which are incompatible with mainline platforms and trains, even if the Arlanda Express goes on a mainline. The stations Sundbyberg and Knivsta have one platform each used by both commuter trains and regional mainline trains, which can cause uncomfortable steps, but is accepted. Sundbyberg has 730 mm and Knivsta has around 500 mm. Stockholm Central station has after the commuter trains moved to the "City" station, two high 730 mm platforms, now used for mainline trains. The Stockholm Metro and Saltsjöbanan have 1125 mm, while tramways in general have a very low platform, often also used by buses which must allow boarding from places without platform.

United Kingdom

The standard height for platforms in the United Kingdom is 915 mm with a margin of ± 25 mm. On the Heathrow Express the platform height is specified at 1100 mm. High Speed 2 is being built with a platform height of 1,115 mm, which does not conform to the European Union technical standards for interoperability for high-speed rail (EU Directive 96/48/EC). This is to provide true step free access to trains at the new HS2 stations, which is not possible using European Standards or UK standard heights. HS2 trains will operate outside of the HS2 line using existing infrastructure, which will not be step free. High Speed 1 has a platform height of 760 mm on its international platforms. The Great Western Main Line, North London Line, Gospel Oak to Barking Line and Great Eastern Main Line platforms will be mixture of 760 mm (for intercity trains) and 1100 mm (for London commuter trains).

France

The standard height for all platforms in France is 550 mm, following the european guidelines. However, this rule is not respected for parts of the RER and Transilien network.

North America

Canada

Intercity and commuter rail

In Canada, Via Rail intercity trains have level boarding with platforms 48 in above the top of rail at Montreal Central Station, Quebec City Gare du Palais and a single platform at Ottawa station. The remainder of stations in the Via Rail network have low platforms 5 in to 8 in above the rail. GO Transit regional trains have a floor height of 610 mm above the top of rail, and GO Transit plans to raise platforms to provide level boarding at that height. Currently, platforms are 127 mm above the top of rail, with a raised "mini-platform" which provides level boarding from one door of the train. Exo commuter trains have level boarding with platforms 48 in, 50 in, or 51 in above the top of rail at Montreal Central, Côte-de-Liesse, Repentigny, Terrebonne, and Mascouche stations. The remainder of stations in the Exo network have low platforms 5 in or 8 in above the top of rail. All UP Express stations have level boarding with platforms 48 in above the top of rail. West Coast Express has accessible boarding platforms at all stations. However, unlike the SkyTrain, there is a small height difference and door-level for wheelchair access are provided at all stations.

Metro and light rail

All rapid transit and light rail systems, except for the Toronto streetcar system, provide level boarding between trains and platforms. The platform heights vary per line, as per the table below. On the Toronto streetcar system, most stops are in mixed traffic accessed from the road surface, without raised platforms. Where raised platforms do exist, they are at sidewalk curb height and not at the height of the vehicle floor. As a result, people using wheeled mobility aids need to use the wheelchair ramp even at stops where a raised platform exists.

United States

New and substantially renovated stations in the United States must comply with the Americans with Disabilities Act, which requires level boarding. Most inter-city and commuter rail systems use either 48 in high platforms that allow level boarding, or 8 in low platforms. Metro and light rail systems feature a variety of different platform heights.

Intercity and commuter rail with high platforms

Most commuter rail systems in the northeastern United States have standardized on 48 in high platforms, and is in general the floor height of single-deck trains. This standard was used by the Pennsylvania Railroad which began installing high platforms on its subsidiary the Long Island Rail Road in 1910 with the introduction of MP54 railcars. MBTA Commuter Rail, CTrail's Hartford Line and Shore Line East, Long Island Rail Road, Metro-North Railroad, NJ Transit, and SEPTA Regional Rail all use this height for new and renovated stations, though low platforms remain at some older stations. Outside the Northeast U.S., Metra Electric District, South Shore Line, RTD, WES Commuter Rail, and SMART use 48-inch platforms. MARC has high-level platforms at most Penn Line stations; although low platforms are used on the Camden Line and Brunswick Line due to freight clearances (and in the latter case, the need to operate with the low-floor-only Superliner), Baltimore-Camden and (stations outside of freight routes) as well as (a station with passing tracks) still feature high platforms. Amtrak intercity services feature high-level platforms on the Northeast Corridor, Keystone Corridor, Empire Corridor, and New Haven–Springfield Line, although some stations on these lines have not been retrofitted with high platforms. High-level platforms are also present at a small number of stations on other lines, including Worcester, Roanoke, Raleigh, and several Downeaster stations. Brightline service in Florida also uses high level platforms. At some stations, a desired high-level platform is impractical due to wide freight trains or other practicalities. (Gauntlet tracks, which permit wide freights to pass full-length high-level platforms, have practical issues of their own.) At these locations, mini-high platforms are often used for accessibility. Mini-high platforms have a short length of high platform, long enough for one or two doors, with an accessible ramp to the longer low platform. The platform edge is usually hinged so that it can be flipped out of the way of passing freights.

Intercity and commuter rail with low platforms

Most other commuter rail systems in the U.S. and Amtrak stations have 8 in low-level platforms to accommodate freight trains, with mini-high platforms or portable lifts to reach the 22 inch-high floors of low-level bilevel railcars. Single-deck cars, which generally serve the prevalent high platforms in the Northeast, feature trapdoors that expose stairs so that passengers can access the low platforms. Double-deck commuter railcars are designed to be compatible with single-deck cars by having a third, intermediate deck above the bogies at both ends, with a matching floor height of 48 in. (Mixed consists of double decks and single decks can sometimes be seen in the FrontRunner system in Utah.) The Bombardier BiLevel Coach is used on many commuter rail networks in North America, with Coaster having 22 in platforms to match their floor height. Once electrified, the new Caltrain trains will be equipped for both 22 and 50.5 in platform heights in anticipation of sharing facilities with California High-Speed Rail trains. A small number of systems do use low-floor single deck trains, including TEXRail and others that use Stadler FLIRT and GTW rolling stock. All of Amtrak's bilevel cars, which are all Superliners, are entirely low-floor and have step-free passthroughs on the upper deck, with the exception of "transition" sleeper cars where one end features stairs to maintain compatibility with single-deck cars (including Amtrak's own baggage cars).

Metro and light rail

Platform heights of metro systems vary by system and even by line. For example, on the MBTA subway system in the Greater Boston area, Blue Line platforms are 41.5 in above top of rail (ATR), while Orange Line platforms are at 45 in, and Red Line platforms are at 49 in. Bay Area Rapid Transit stations have platform heights of 39 in. Most light rail systems have platforms around 12-14 inch ATR, allowing level boarding on low-floor light rail vehicles. Most new systems are built to this standard, and some older systems like VTA light rail have been converted. Several systems including MetroLink use higher platforms with level boarding. Several older light rail systems have high-floor vehicles but low platforms, with mini-high platforms or lifts for accessibility. Some, like the MBTA Green Line, are being converted to low-floor rolling stock, while others, like Baltimore Light Rail have permanent mini-high platforms. Muni Metro has 34 in high platforms in the subway section as well as some surface stops, and mini-high platforms at other surface stops; the vehicles have movable stairs inside to serve both high and low platforms.

Oceania

Australia

The majority of railway systems in Australia use high level platforms with a platform height a small distance below the train floor level. Exception to this include Queensland who have narrow gauge trains and lower platforms, and South Australia who have trains fitted with low level steps to enable the use of low level platforms. In New South Wales, by 2000, the platform step (the difference between the platform height and the train floor height) had been allowed to grow to a maximum of about 300 mm, which was uncomfortably large. For Sydney's 2000 Olympics, new and altered platforms were designed to match the Tangara trains, which are 3000 mm wide, leaving a platform gap of about 80 mm and a step height close to zero. This has become the standard for all subsequent platforms and trains in NSW. In Victoria, the standard platform height for metropolitan and regional stations is 1080mm above the top of rail.

Metro and light rail

The tramway network in Melbourne have some low level platforms and low floor vehicles, but most trams have steps and are boarded from the road. The Adelaide Tram line has low platforms at almost all stops and operates almost entirely with low-floor trams which also have retractable ramps for street boarding where required by persons unable to step up. The Gold Coast and Sydney light rail networks have low floor trams and platforms at all stops.

South America

Argentina

Platforms for long-distance trains are 200 mm above rail, and platforms for Buenos Aires commuter trains are 1100 mm.

Sources