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The Southern Freeway and Old Princes Highway provide alternative inland routes, descending the escarpment further south at Bulli Pass or at Mount Ousley, entering the coastal plain at Gwynneville, just north of Wollongong's city centre.
The Illawarra region is linked to Sydney by several passes and a motorway (Southern Freeway) and electric railway (see South Coast railway line); to the west by the Illawarra Highway and Picton Road; and to the south by the Princes Highway.
Waterfall is the last suburb heading south on the Princes Highway before it leads into the Southern Freeway (also known as the F6 freeway) to the city of Wollongong.