The railways of Switzerland include standard gauge (i.e. 1,435 mm (4 ft ft 8 in) ) and narrow gauge (usually 1,000 mm (3 ft 3 in), occasionally less). Network size: 5,063 km standard gauge: 3,652 km 1,435 mm (4 ft ft 8 in) gauge (3,641 km electrified) narrow gauge: 1,383 km (1,353 km electrified), mostly 1,000 mm (3 ft 3 in) gauge, some 800 mm (2 ft 7 in) gauge and one line (Waldenburgerbahn, 13 km) 750 mm (2 ft 5 in) gauge. street tramways: almost all 1,000 mm (3 ft 3 in) gauge. Three quarters of the Swiss rail network is at standard gauge, comprising 3,652 km, administered mostly by two companies. Important railway stations are the Zürich Hauptbahnhof, the Basel SBB railway station and the Bern railway station.