Metrovalencia is a modern amalgamation of former FEVE narrow gauge diesel and electric operated suburban/regional railways. It is a large suburban network that crosses the city of Valencia, with all trains continuing out to the suburbs. It also has destinations on lines that make it more closely resemble commuter trains. The unique system combines light railway, metro and several tram operations north of the Túria riverbed park with line 4. Trains of lines 1, 3, 5 and 9 have automatic train operation (ATO) in 25.3 kilometers of underground system. Tram lines 4, 6 and 8 are operated by modern trams.