Introduction: As time passes, our society is developing. Inevitably, it has some advantages and disadvantages, including urbanisation, i.e. towns and cities grow rapidly as people move from the countryside (Bilham-Boult, 1999). As everyone knows, urbanization causes a great deal of problems. To solve these problems, governments have developed a policy of sustainable development, which means development that meets the needs of the present without compromising the ability of future generations to meet their own needs (Brundtland, 1987). From my point of view, sustainable development can largely solve the problems of urbanization, alleviating traffic problems, reducing pollution and alleviating housing pressure. Alleviate traffic problemsWith social progress and economic development, more and more people have their own cars. Inevitably, traffic congestion becomes a major urbanization problem. In the late 19th century, railroad companies created widely dispersed settlements around Los Angeles, and this made the private car attractive. In 1925 the subway idea was proposed, but county voters rejected the idea. And the most serious problem is that the growth rate of the number of vehicles is faster than that of the population (Thisdell, 1993). This example shows the high dependence of Americans on their private cars, and it is so difficult to solve the traffic problem because the government does not have an effective policy. If governments paid more attention to traffic infrastructure or changed the city landscape they could have some help. Here's another example. The average increase in car use in Australian and Canadian cities declined from the 1960s to the 1980s. The reduced growth could be due to 4 reasons: reurbanization of older suburbs; development of nodal sub-centres in the outer suburbs; better urban environments; less dispersion and development of highly car-dependent individuals