交通拥堵作为全球大城市的通病,正在我国许多大城市中迅速蔓延。尤其是在北京、上海这些特大城市,交通拥堵现象日趋严重,交通成为制约城市和谐发展的瓶颈。随着经济社会的发展和城市化进程的加快,迸发出远远出乎人们预料的巨大交通需求,原有的城市交通系统面临着前所未有的挑战 As a common problem in big cities around the world, traffic jams are rapidly spreading in many large cities in our country. Especially in the mega-cities of Beijing and Shanghai, the phenomenon of traffic jams is becoming increasingly serious, and traffic has become the bottleneck restricting the harmonious development of cities. With the economic and social development and the acceleration of the urbanization process, the outbreak unexpectedly huge traffic demand, the original urban transport system is facing an unprecedented challenge