| Part of a series on |
| Rail transport |
|---|
| Infrastructure |
| Rolling stock |
| Urban rail transit |
| Other topics |
Atram-train, also known as adual-system tram,[1] is an interoperableurban rail transit system in which specially designed vehicles operate astrams on urban street-level networks and astrains on mainline railway tracks, alongside mainline trains.[2]
By complying with bothlight rail andheavy rail technical and safety standards, these vehicles can use existing tram infrastructure as well as railway lines and stations, enabling a single service to operate across both networks.[3] A tram-train combines the urban accessibility of a tram or light rail with a mainline train's greater speed in the suburbs.[4]
The modern tram-train concept was pioneered by the German city ofKarlsruhe in the late 1980s,[5] resulting in the creation of theKarlsruhe Stadtbahn. This concept is often referred to as theKarlsruhe model,[4] and it has since been adopted in other cities such asMulhouse in France[4] and inKassel,Nordhausen andSaarbrücken in Germany.[5] It can be regarded as an evolution of the earlierinterurban operations model.
An inversion of the concept is atrain-tram – a mainline train adapted to run on-street in an urban tramway, also known as theZwickau Model.
The tram-train often is a type ofinterurban[6] — that is, they link separate towns or cities, according to George W. Hilton and John F. Due's definition.[7]
Most tram-trains arestandard gauge, which facilitates sharing track with main-line trains. Exceptions includeAlicante Tram andNordhausen, which aremetre gauge.
Tram-train vehicles are dual-equipped to suit the needs of both tram and train operating modes, with support for multiple electrification voltages if required and safety equipment such astrain stops and other railway signalling equipment. The Karlsruhe andSaarbrücken systems use "PZB" or "Indusi"automatic train protection, so that if the driver passes a signal at a stop the emergency brakes are applied.
The idea is not new; in the early 20th century,interurban streetcar lines often operated on dedicated rights-of-way between towns, while running on street trackage in town. The difference between modern tram-trains and the older interurban and radial railways is that tram-trains are built to meet mainline railway standards, rather than ignoring them. A few interurban services did share tracks with mainline steam railroads, such as theDaisy Line orEast Bay Electric Lines.
In 1924, inHobart, Australia, sharing of tracks between trams and trains was proposed.[8]
| Country | Location | System | Year opened | Lines | Stations | Length | Notes |
|---|---|---|---|---|---|---|---|
| Fukui | Fukui Fukubu Line | 1924 | 1 | 23 | 21.4 km (13.3 mi) |
| Country | Location | System | Year opened | Lines | Stations | Length | Notes |
|---|---|---|---|---|---|---|---|
| Gmunden | Traunsee Tram | 21 March 1912 | 1 | - | 17.9 km (11.1 mi) | Since (1 September 2018)[9] it has been connected to theGmunden Tramway as part of theTraunseetramtram-train service.[10] | |
| Vienna | Badner Bahn | 1873 | 1 | 36 | 30.4 km (18.9 mi) | Baden bei Wien | |
| Aarhus | Aarhus Letbane | 21 December 2017 | 2 | 51 | 110 km (68 mi) | Tram-train and light rail[11] | |
| Lyon | Rhônexpress | 9 August 2010 | 1 | 4 | 23 km (14 mi) | ||
| Tram-train de l'ouest lyonnais | 22 September 2012 | 2 | 23 | 55 km (34 mi) | |||
| Mulhouse | Mulhouse Thur Valley Tram-Train [fr] | 12 December 2010 | Line 3 | 18 | 22 km (14 mi) | Tram ofMulhouse tramway and Mulhouse Thur Valley Tram-train[12] | |
| Nantes | Nantes tram-train | 15 June 2011 | 2 | 18 | 64 km (40 mi) | ||
| Paris,Île-de-France | Île-de-France tramway Line 4 | 20 November 2006 | line 4 | 20 | 13.3 km (8.3 mi) | ||
| Île-de-France tramway Line 11 Express | 1 July 2017 | Line 11 | 7 | 11 km (6.8 mi) | |||
| Île-de-France tramway Line 12 Express | 10 December 2023 | Line 12 | 16 | 20 km (12 mi) | |||
| Île-de-France tramway Line 13 Express | 6 July 2022 | Line 13 | 12 | 18.8 km (11.7 mi) | |||
| Île-de-France tramway Line 14 | March 2025 | Line 14 | 5 | 9.9 km (6.2 mi) | |||
| Chemnitz | City-Bahn Chemnitz | 10 March 1997 | 4 | - | - | ||
| Karlsruhe | Karlsruhe Stadtbahn | 25 September 1992 | 12 | 190 | 262.4 km (163.0 mi) | ||
| Kassel | Kassel RegioTram | 2006 | 3 | - | 184 km (114 mi) | ||
| Nordhausen | Trams in Nordhausen | 25 August 1900 | 3 | 32 | 22.4 km (13.9 mi) | ||
| Saarbrücken | Saarbahn | 24 October 1997 | 1 | 43 | 44.0 km (27.3 mi) | ||
| Szeged,Hódmezővásárhely | Szeged-Hódmezővásárhely tram-train | 29 November 2021 | 1 | 31.6 km (19.6 mi) | |||
| Bergamo | Bergamo–Albino light rail | 24 April 2009 | 1 | 16 | 12.5 km (7.8 mi) | ||
| Rome | Rome–Giardinetti railway | 1916 | 1 | 19 | 5.4 km (3.4 mi) | Closed; 2015 (Centocelle-Giardinetti) | |
| Sassari | Metrosassari | 27 October 2006 | 1 | 8 | 4.331 km (2.691 mi) | ||
| The Hague-Rotterdam | RandstadRail | 29 October 2006 | 4 | 73 | 71 km (44 mi) | ||
| Porto | Porto Metro Line B/Bx - (Estádio do Dragão – Póvoa de Varzim) | 13 March 2005 | 1 | 36 | 33.6 km (20.9 mi) | Bombardier Flexity Swift light rail | |
| Porto Metro Line C - (Campanhã – Ismai) | 30 July 2005 | 1 | 24 | 19.6 km (12.2 mi) | |||
| Alicante | Alicante Tram Line 1 (Alicante Metropolitan Tram - Luceros – Benidorm) | 30 July 2007 | 1 | 20 | 19.6 km (12.2 mi) | ||
| Alicante Metropolitan Tram - Luceros – El Campello | 2003 | 1 | 17 | 14.404 km (8.950 mi) | |||
| Mallorca | Mallorca rail network,Serveis Ferroviaris de Mallorca | 1994 | 3 | 29 | 85 km (53 mi) | Ferrocarril de Sóller | |
| Cádiz | Cádiz Bay tram-train | 26 October 2022 | 1 | 21 | 24 km (15 mi) | ||
| Sheffield -Rotherham | South Yorkshire Supertram | 25 October 2018 | 1 | 14 | 29 km (18 mi) | Tram-Train (Black) Route | |
| Cardiff &South Wales Valleys | South Wales Metro | 2026 | 9 | 94 | 169.2 km (105.1 mi) |
| Country | Location | System | Year opened | Lines | Stations | Length | Notes |
|---|---|---|---|---|---|---|---|
| Ottawa | Line 2 (O-Train) | 15 October 2001 | 1 | 11 | 19 km (12 mi) | O-Train,Diesel light | |
| Line 4 (O-Train) | 6 January 2025 | 1 | 3 | 4 km (2.5 mi) | O-Train,Diesel light | ||
| Waterloo Region | Ion rapid transit[13] | 21 June 2019 | 1 | 19 | 19 km (12 mi) | Light rail | |
| Puebla | Puebla–Cholula Tourist Train | 23 January 2017 | 1 | 2 | 17.4 km (10.8 mi) | (Closed; 31 December 2021; trains now sold toTren Interoceánico) | |
| San Diego,California | San Diego Trolley | 26 July 1981 | 4 | 62 | 105 km (65 mi) |
| Country | Location | System | Year opened | Lines | Stations | Length | Notes |
|---|---|---|---|---|---|---|---|
| Bogotá | RegioTram | - | - | 17 | 39.6 km (24.6 mi) |
Models of tram designed for tram-train operation include:

