澳大利亚土地辽阔,人口稀少。全国面积774万多平方公里,仅有1,500万人,人口密度,比我国的青海、新疆还低。这就给交通运输造成很大困难。但是,由于他们重视发展交通事业,特别是第二次世界大战以来,联邦政府和各州政府,采取了一系列措施,修建公路,发展汽车运输,取得了很大成绩。现在已建成了四通八达的全国公路 Australia is vast and sparsely populated. With a total area of ​​more than 7.74 million square kilometers, only 15 million people live in China. Its population density is even lower than that of China’s Qinghai and Xinjiang. This has caused great difficulties for transportation. However, due to their emphasis on the development of transportation, especially since the Second World War, the federal government and the state governments have taken a series of measures to build highways and develop motor transport and achieved great success. There is now a national road extending in all directions