the last westbound train to leave Chicago从芝加哥开出的最后一班西行列车

The truck was westbound on the M5.卡车在5号高速公路上向西行驶。

Westbound traffic is moving very slowly.西行的车流行驶非常缓慢。

Traffic is slow on the westbound carriageway of the M4.4号高速公路的西向车道车流速度缓慢。