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Apparatus and methods for strengthening guardrail installations
(United States. Patent and Trademark Office, 2003-06-10)
Devices and methods for strengthening the upper portions of the support posts for guardrails and guardrail end treatments against the forces that are imparted to the post during an impact. The upper portions of support ...
Barrel crash cushions
(United States. Patent and Trademark Office, 2000-10-03)
Apparatus and methods are described relating to barrel crash cushions which readily collapse when impacted from a substantially end-on direction, and are more capable than conventional designs of substantially redirecting ...