名詞 carriageway:

1. one of the two sides of a motorway where traffic travels in one direction only usually in two or three lanes

1. At that point, the road opens out and becomes a dual carriageway.
   公路在那個地方變寬了，變成了雙車道。
2. The eastbound carriageway of the motorway is closed.
   高速公路向東方向的行車道已關閉禁止通車。
3. The southbound carriageway of the motorway is closed.
   高速公路上往南行使的行車道被關閉了。
4. The road opened out into a dual carriageway.
   這條路已擴展成了復式車行道。