US Patent 10036132 Twist box guardrail terminal

This guardrail terminal design incorporates an impact head of open front configuration adapted with the rear portion as a funnel disposed with the narrow end of the funnel facing forward which will flatten the W beam guardrail as it moves down the beam when impacted by a vehicle. Tension is maintained on the beam by flat strips connected from the beam through top open front of the impact head and is attached to a front anchor post. A wedge shaped reverse direction bracket with slotted bolt holes such that the slots open toward the traffic direction disposed at the back of the impact head where it connects to the guardrail will allow for reverse direction impacts to be accounted for.