, ), commonly known by its acronym ETS, is a railway infrastructure manager operating in the Basque Country, Spain. The company was formed in 2004, but the railway infrastructure it operates was transferred from Euskotren in 2006.[3] It is a member of the International Union of Railways.[4]
The company owns the network in which Euskotren operates (including the Irauregi–Lutxana and Ariz–Basurto freight lines[5]), as well as the infrastructure of the Bilbao and Vitoria-Gasteiz tram systems.[6] It also shares the ownership of Lines 1 and 2 of the Bilbao Metro with the Biscay Transport Consortium. The company is also building the Gipuzkoan branch of the Basque Y high-speed line under an agreement with ADIF