The selection of road guardrails should comprehensively consider factors such as road type, functional requirements, material properties, environmental adaptability, and maintenance costs. High strength waveform guardrails are commonly used on highways, while urban roads emphasize aesthetics and pedestrian protection. For special areas, concrete or composite material guardrails should be selected. In terms of materials, metal guardrails are suitable for high flow areas, concrete guardrails are used for high-risk areas, and composite materials are suitable for landscape roads. At the same time, corrosion-resistant or low-temperature tough materials should be selected based on climatic conditions, and attention should be paid to coordination with the surrounding environment. The convenience of maintenance and the full lifecycle cost should also be taken into consideration to achieve the unity of safety, durability, and aesthetics.
