The West Gate Freeway is a major freeway in Melbourne, the busiest urban freeway and the busiest road in Australia, carrying upwards of 200,000 vehicles per day. It links Geelong and Melbourne's western suburbs to central Melbourne and beyond. It is also a link between Melbourne and the west and linking industrial and residential areas west of the Yarra River with the city and port areas. The West Gate Bridge is a part of the freeway.

Princes Freeway is a 159-kilometre (99 mi) Australian freeway, divided into two sections, both located in Victoria, Australia. The freeway links Melbourne to Geelong in the west, and to Morwell in the east. It continues beyond these extremities as the Princes Highway towards Adelaide to the west and Sydney to the northeast. The freeway bears the designation M1.