Highway guardrails are an important part of traffic safety facilities, mainly used to prevent vehicles from running off the road, reduce collision impact, guide vision, and reduce the severity of accidents.
Main types of highway guardrails:
(1) W-Beam Guardrail
Material: galvanized steel plate (Q235 carbon steel, hot-dip galvanized surface for rust prevention).
(2) New Jersey Barrier
Material: reinforced concrete.
(3) Cable Barrier
Material: high-strength steel wire rope + steel column.
(4) Combined Guardrail
Combines the advantages of W-beam and concrete guardrails, suitable for special sections (such as bridge transition sections).
Guardrail installation location
| Location | Common guardrail types | Effect |
| Central isolation zone |
W-Beam Guardrail,New Jersey Barrier |
Prevent oncoming vehicles from colliding |
| Roadside (side slope) | W-Beam Guardrail,Cable Barrier | Prevent vehicles from running off the road |
| Bridge Section | New Jersey Barrier,Combined Guardrail | Enhanced protection to prevent vehicles from falling off the bridge |
| Toll station area | Anti-Collision Column + Guardrail | Buffer vehicle impact and protect toll collection facilities |
