category of traffic

例句：

1. 1.The classification of traffic categories is crucial for efficient transportation planning.
   交通类别的分类对于高效的交通规划至关重要。
2. 2. The city has implemented a new system to classify traffic categories based on their severity.
   该城市实施了一个新的系统，根据其严重程度对交通类别进行分类。
3. 3. The classification of traffic categories helps in managing congestion and reducing emissions.
   交通类别的分类有助于管理拥堵和减少排放。