随着我国社会和经济的发展,城市化和机械化的进程加快。城市人口向大城市、特大城市聚集势不可挡,据预测,每年将有1600多万农村人口流入城市;私人小汽车进入家庭的势头发展迅速,全国各大城市道路交通状况普遍告急,车多路少,拥堵不堪,城市交通已经成为城市发展的瓶颈。诸多交通? With the social and economic development in our country, the process of urbanization and mechanization has accelerated. It is predicted that over 16 million rural population will flow into the cities each year; the momentum of private cars entering the home is developing rapidly; the road traffic conditions in major cities across the country are generally in an emergency situation with fewer cars and roads, Traffic congestion, urban transport has become the bottleneck of urban development. Many traffic?