1. Corrugated beam steel guardrail. The widest application range, high safety level, easy maintenance, moderate cost, commonly used on the side of main roads, central roads, and ramp roads.
2. Square tube crossbeam guardrail. Mainly used for central separation of bridges and snow covered areas in the north, with high safety level, easy maintenance, and high cost, commonly used in northern regions.
3. Flexible guardrail. Mainly used in scenic areas, with moderate safety level, difficult maintenance, and moderate cost, mainly used on the roadside.
4. Concrete guardrail. Mainly used for central separation in service areas and ramps, with moderate safety level, difficult maintenance, and slightly lower cost.