adv.& adj.向西(的)
the westbound carriageway of the motorway
高速公路的西行车道
The westbound carriageway of the motorway is closed.
朝西面去的车道已关闭了.
Traffic is slow on the westbound carriageway of the M4.
M4号高速公路西向车道车流行驶缓慢。