公路车的英文缩写为road car或road traffic。
双语例句：
1、由菲亚特集团（Fiat）拥有的法拉利表示，计划在3至4年内，开始推出所有公路车的混合动力版。
The brand， owned by Fiat， said it planned to begin introducing hybrid versions of all of its road cars within three to four years.
2、目前国内外对一般公路车流量预测方法的研究已经趋于成熟。
At present the research on the general road traffic flow forecast has matured.
