In addition to safety protection functions, highway guardrails also have multiple functions such as separating the roadway from pedestrian areas, preventing vehicles from deviating from the lane, reducing collision injuries, providing guidance functions, marking dangerous areas, beautifying the urban environment, and diverting traffic flow. These functions together ensure the safety, orderliness, and aesthetics of highway traffic.

High speed guardrails play an irreplaceable role in traffic safety. Firstly, it can effectively prevent vehicles from running into opposite lanes or falling into roadside ravines after losing control, reducing the occurrence of traffic accidents. Secondly, the installation of guardrails can guide the driver's line of sight and improve driving safety. In addition, safety facilities such as reflective strips and delineators on guardrails can provide additional warning effects at night or in adverse weather conditions, helping drivers identify road boundaries and obstacles.