The standard gauge line followed a new alignment through the Avon Valley of the Darling Scarp east of Perth . The standard gauge line followed a new orientation through the Avon valley of Darling Scarp east of Perth .
Garis tolok piawai mengikuti penjajaran baru melalui Lembah Avon Darling Scarp di timur Perth. Garis tolok standard mengikuti orientasi baru melalui lembah Avon Darling Scarp di timur Perth.