A highway guardrail terminal system having horizontally extending guardrail elements mounted on a plurality of posts. An impact head is positioned over the upstream end of the guardrail. A kinker beam is attached to an inlet of head and a kinking deflector plate is affixed inside the head. ...http://www.google.es/patents/US5775675?utm_source=gb-gplus-sharePatente US5775675 - Sequential kinking guardrail terminal system
