As part of celebrations for the tenth running of the event at Albert Park in 2005, Webber drove his Williams F1 car over the Sydney Harbour Bridge in a promotional event, and the Melbourne city streets hosted a parade of F1 machinery and Supercars, Australia's highest-profile domestic motor sport category. For over thirty years, Supercars have competed in the Supercars Challenge non-championship event at the Australian Grand Prix. In 2018, the event was contested for championship points for the first time, and was known as the Melbourne 400.