In Sydney, an expansive network of various motorways and roads play a substantial and fundamental role, spurred by a high reliance on motoring as a means of transport. Collectively, 160 kilometres of motorways, freeways and tolled roads serve the Greater Sydney area and on average, the majority of households rely on at least 1 or 2 cars as a means of transport. However, despite this high reliance on roads, Sydney still maintains the highest rate of usage of public transport in Australia.