Most Slovenian railway lines were built during the Austro-Hungarian Empire.
1,000 mm (3 ft 3+3⁄8 in) gauge
760 mm (2 ft 5+15⁄16 in) gauge
750 mm (2 ft 5+1⁄2 in) gauge
620 mm (2 ft 13⁄32 in) gauge
600 mm (1 ft 11+5⁄8 in) gauge