高速公路的英文单词是 "highway"。
其来源是英语中的 "high" 和 "way"，"high" 意为 "高"，"way" 意为 "道路"，因此 "highway" 意为 "高速公路"。
例句：
The highway was crowded with cars during rush hour. (高速公路在高峰时段被汽车挤满了。)
We took the highway to get to the next city. (我们沿着高速公路前往下一个城市。)
The highway construction caused delays for commuters. (高速公路建设导致通勤者延误。)