高速公路护栏是半钢性护栏的主要形式，它是一种以波纹状钢护栏板相互拼接并由主柱支撑的连续结构。车辆对其碰撞时，由于波形钢护栏板有良好的耐撞性能和吸收能量的作用，既不容易被撞毁，同时又可对车辆和司乘人员起到很好的保护作用。
Highway guardrail is the main form of semi-steel guardrail. It is a continuous structure with corrugated steel guardrail panels joined together and supported by the main column. When a vehicle collides with it, because the corrugated steel guardrail has good crashworthiness and energy absorption, it is not easy to be crashed, but also plays a very good protective role for the vehicle and the crew.