In China, roadside guardrails are made of hard metal materials. Once a car accident occurs, the passengers are likely to suffer secondary injuries from the guardrails. Recently, a popular guardrail on the Internet has quietly appeared in our field of vision. The principle of this invention is to convert the impact force into rotational kinetic energy through a rotating device, thereby absorbing the impact force and greatly reducing the occurrence of traffic accidents. It is reported that this "rotating guardrail" has appeared in the United States, South Korea, Japan and other places. Some areas in China have also begun testing and applying it.

my country's highways use guardrails made of hard metal. Once a car accident occurs, it is likely that the guardrail will cause secondary injuries. Once the "rotating guardrail" is used, it will save countless lives.