随着改革开放的不断深入，国民经济持续增长，城市建设日新月异，交通需求也发生了由量到质的变化。回顾５０年来，特别是改革开放２０年来北京城市交通规划建设和管理工作，既有许多成功的经验，也有一些值得反思的教训。１．城市交通系统状态变化和交通规划观念的更新改革开 With the continuous deepening of the reform and opening up, the national economy continues to grow, the city building is changing with each passing day, and the traffic demand has also changed from quantity to quality. Looking back over the past 50 years, especially in the 20 years since the reform and opening up, Beijing’s urban transport planning, construction and management have had many successful experiences and some lessons worth reflecting on. 1. Changes in the status of urban transport systems and the reform of transport planning concepts