In the 1955 Redex Trial 276 cars left Sydney on 21 August and passed through checkpoints at Newcastle, Tamworth, Southport, Brisbane, Toowoomba, Maryborough, Rockhampton, Marlborough, Sarina, Townsville, Cairns, Hughenden, Duchess, Camooweal, Tennant Creek, Darwin, Katherine, Fitzroy Crossing, Port Hedland, Carnarvon, Perth, Northam, Kalgoorlie, Madura, Ceduna, Adelaide, Broken Hill, Mildura, Horsham, Mt. Gambier, Melbourne, Whitfield, Corryong, Canberra, Goulburn, and Wollongong, before terminating in Sydney on September 11, a distance of 10500 miles .