Public Transport / Spain, Portugal / Bilbao
Bilbao had a large tramway network in the first half of the twentieth century, which had a length of over 100 kilometres at its maximum extent and was abandoned until 1964. In 2002, a 4.5-kilometre line was reopened to provide a supplementary service in the city centre in addition to the metro. Meanwhile, several extensions, also including a former railway line, have increased the line's length to about 8 kilometres. The Bilbao metro consists of two routes that share a common section through the city centre. The network is about 45 kilometres long and, like the tram, uses metre gauge. In 2017, the regional trains of the Basque narrow-gauge railway "Euskotren" were also given a tunnel route under the western districts of Bilbao. This section is designated as Metro Line 3 and is operated frequently in this section. While the → Metro Bilbao is operated by a same-named company, the tram as well as Metro line 3 belongs to the Basque railway operator → Euskotren.