根据我国的《城市道路交通规划设计规范》,城市道路被分为快速路、主干路、次干路、支路四个等级。研究表明,在道路交通管理工作中,虽然各种道路都用于车辆和行人的通行,但对于畅通工程的要求却不是完全一致的。因为城市交通是一项系统工程,不同的道路在交通功能上须有所侧重、 According to China’s “urban road traffic planning and design specifications,” urban roads are divided into expressways, trunk roads, secondary trunk roads, branch four levels. Studies show that while roads are used for vehicles and pedestrians in road traffic management, the requirements for smoothing work are not exactly the same. Because urban transport is a systematic project, different roads have to be given priority in traffic functions.