Euskotren Tranbia[a] is the brand under which the tramway networks in the cities of Vitoria-Gasteiz and Bilbao (both in the Basque Country) are run.

The infrastructure is owned by the public entity Euskal Trenbide Sarea (Basque Railway Network)[4] and tracks use 1,000 mm (3 ft 3+3⁄8 in) narrow gauge.

The first network, then named EuskoTran started operations in Bilbao in 2002 after two years under construction, connecting Bilbao-Atxuri Station with Uribitarte.

[5] The line was eventually expanded to the Guggenheim Museum Bilbao,[6] Basurto Hospital[7] and finally La Casilla.

[8] The tramway system in Vitoria-Gasteiz opened in 2008 and has a Y-shaped network, with two different lines that cross the city from south to north.

[citation needed] It also shares dedicated lanes with the local bus services, TUVISA in Vitoria-Gasteiz and Bilbobus in Bilbao.

All the stations have displays and screens with the network map, the current time and temperature and the frequencies.

The second phase would have involved the line itself including the rail track and stops from the University of the Basque Country campus to downtown Leioa.

A third phase would have made the tramway cross the Estuary of Bilbao and connect Leioa with the Left Bank with two extra stations.