I glanced up to find two vapor trails heading off to the west in perfect parallel, like tram tracks.

我抬头一看，发现两条蒸汽轨迹完全平行地向西延伸，就像电车轨道一样。

The rails are laid flush with the road surface like tram tracks in the fast lane which is closed to traffic once every half hour for the trains to past through.

铁轨与路面齐平铺设，就像快车道上的电车轨道一样，每半小时封闭一次，供火车通过。