Cross-section of triple-gauge track at Gladstone and Peterborough , South Australia , before gauge standardisation . The three gauges require the respective gaps between the outer and inner rails to be different, unlike four-rail dual gauge.
Penampang melintang sepur rangkap tiga di Gladstone dan Peterborough, Australia Selatan , sebelum standardisasi lebar sepur . Ketiga lebar sepur membutuhkan celah masing-masing antara rel luar dan dalam agar berbeda, tidak seperti lebar sepur ganda empat rel.