highway environmental protection desing

例句：

1. 1. The highway runs through the citycenter.
   这条高速公路穿过市中心。
2. 2. Theexpressway is faster thanthe regular road.
   这条高速公路比常规道路快。
3. 3. The motorway wasclosed due to a traffic accident.
   由于交通事故，这条高速公路被关闭了。