traffic classification

例句：

1. 1. The traffic police are responsible for maintaining the order of the road traffic.
   交通警察负责维护道路交通秩序。
2. 2. The traffic classification system is designed to improve safety and efficiency on theroads.
   交通分类系统旨在提高道路安全和效率。
3. 3. The new traffic classification system will help reduce congestion in the city center.
   新的交通分类系统将有助于减少市中心的拥堵。