be crowded with people and vehicles 车水马龙

“车水马龙”，汉语成语，字面意思是车像流水，马像游龙。形容车马或车辆很多（endless stream of horses and carriages），来往不绝，热闹繁华的景象。可以翻译为“be crowded with people and vehicles，heavy traffic (in the street)”等。

例句：

院子前车水马龙。

The courtyard is thronged with visitors.

那个骑自行车的人在车水马龙中迂回穿行。

The cyclist was weaving his way through the busy traffic.