Before revision: A removable guardrail as median barrier In traffic engineering, highway guardrail may prevent an errant vehicle from hitting roadside obstacles which may be either man-made (sign structures, culvert inlets, utility poles) or natural (trees, rock croppings), 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).
After revision: a,A removable guardrail as median barrier In traffic engineering, highway guardrail may prevent an errant vehicle from hitting roadside obstacles which may be either man-made (sign structures, culvert inlets, utility poles) or natural (trees, rock croppings), 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).