交通是一个国家的命脉,是经济和文化的枢纽,它使城市有了动力和活力。我们今天衡量一个国家发达与否,最重要的标准仍然是看其城市交通现代化的程度。当今,城市化与汽车化发展十分迅猛,城市化的迅速推进特别是大城市规模的扩张,带来了机动车的迅速增长,使交通问题成为各国极其严 Transport is the lifeblood of a nation, a hub of economy and culture that gives the city the power and vitality. Today, the most important criterion for measuring the development of a country is still to see the extent of its urban traffic modernization. Today, the rapid development of urbanization and automobileization, the rapid urbanization, especially the expansion of large cities, has brought the rapid growth of motor vehicles, traffic problems become very strict