Guardrail is a system designed to keep people or vehicles from (in most cases unintentionally) straying into dangerous or off-limits areas. A handrail is less restrictive than a guard rail and provides both support and the protective limitation of a boundary. In traffic engineering, highway guardrail may prevent an errant vehicle from impacting roadside obstacles, running off the road and going down a steep embankment, or veering off the roadway into oncoming traffic (commonly referred to as a median barrier). TSP has designed, manufactured and installed more than 500 KM of guardrail and handrail for high way across Iran.

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