Through, Over, or Under Guardrail Penetration by Guardrail Height

This report evaluates whether a clear correlation between guardrail height and penetration of the guardrail exists in the collision and roadside features inventory datasets available for Washington State. In particular, do guardrail heights of 27 inches or lower experience more through, over, or under penetrations (TOU) than 28 inch or greater guardrail installations?
Publication Date: 
Thursday, December 31, 2009
Publication Number: 
WA-RD 742.1
Last modified: 
10/12/2016 - 15:42
Brad Manchas, Dave Olson.
Washington (State) Dept. of Transportation. Design Policy, Standards & Research Team
Number of Pages: 
Guardrails, Height, Physical properties, Collisions.