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 guardrail, also known as highway collision barrier, is a metal structure installed on both sides or the central divider of a highway. When a vehicle loses control or deviates from its normal driving trajectory, high-speed guardrails can effectively block the vehicle, prevent it from rushing into the opposite lane or falling into roadside ravines, thereby reducing the occurrence of traffic accidents and reducing accident losses.