M1 Princes Motorway

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Princes Motorway is a 62-kilometre (39 mi) predominantly dual carriage untolled motorway that links Sydney to Wollongong and further south through the Illawarra region to Oak Flats. Part of the Australian Highway 1 network, the motorway is designated route M1.
The motorway is sometimes known by its previous signposting F6 (Freeway Route 6) and its previous name Southern Freeway, which applied to the sections between Waterfall and Bulli Tops as well as Gwynneville and Yallah. The section between Bulli Tops and Gwynneville was known as Mount Ousley Road, and was first built as a defence route and later upgraded to dual carriageway standards.