オーストラリアの幹線道路
Old Hume Highway, New South Wales
Old Hume Highway, Victoria
Olympic Highway (National 41), New South Wales
Omeo Highway (State C543), Victoria
Outback Highway, Northern Territory
Outback Highway, Queensland
Outback Highway, Western Australia
Ovens Highway (State B500), Victoria
Oxley Highway (National 34), New South Wales