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| Subject | English | Basque |
| environ. | high-speed railway The term "high-speed traffic" encompasses all trains running at speeds over 200 km/h but also trains running at 200 km/h if the terrain, population density or economic reasons do not justify higher speeds | abiadura handiko trenbide |
| environ. | railway network The whole system of railway distribution in a country | trenbide-sare |
| environ. | railway station A place along a route or line at which a train stops to pick up or let off passengers or goods, especially with ancillary buildings and services | tren-geltoki |
| environ. | underground railway An electric passenger railway operated in underground tunnels | lurpeko trenbide |
| environ. | underground railway An electric passenger railway operated in underground tunnels | metro-linea |