几年来,尽管北京市采取了一系列措施大力整治交通秩序,但面对日益增长的城市人口和车辆而言,交通拥堵难题仍未从根本上解决。交通拥堵和大气污染是当前北京市人民群众最为关注,也最迫切需要解决的两大城市难题。有数据显示,北京市机动车保有量巨大和高强度使用既是造成交通拥堵的主要原因之一,同时也是空气污染的主要成因之一。几年来,尽管北京市采 In recent years, despite a series of measures taken by Beijing Municipality to rectify the traffic order, the traffic congestion problem has not yet been fundamentally solved in the face of the growing urban population and vehicles. Traffic congestion and air pollution are two major urban problems that the people in Beijing are most concerned about and most urgently need to solve. Data show that the large and high-intensity use of motor vehicles in Beijing is not only one of the major causes of traffic congestion, but also one of the major causes of air pollution. In recent years, despite the mining in Beijing