Guidelines for Guardrail ImplementationExplores guidance on selecting the appropriate barrier performance level for the installation of longitudinal barriers. The appendices are not published in this report. They are only available online. |
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AASHTO appropriate guardrail test Arterial Wide average crash cost B/C ratio barrier test level benefit-to-cost analysis Chapter Collector/Local Wide Cooper cost beneficial crash data crash frequency curvature development of guardrail encroachment frequency encroachment probability models Engineering estimated evaluation Federal Highway Administration Federal Railroad Administration Federal Transit Administration FHWA freeways grade guardrail application guardrail selection guidelines guardrail test level guardrail use guidelines guidelines for guardrail hazard envelope hazard offset highway agency highway functional class Hutchinson and Kennedy identify lateral extent ment moderately severe National Academy NCHRP parameters point hazards procedures ran-off-road crashes roadside hazards Roadside Safety roadside slopes Roadway and roadside RSAP analysis RSAP runs Rural Arterial Rural Collector/Local safety improvements safety treatment severe hazard severe slope shown in Table site-specific slope hazards terrain Texas Transportation Institute tion TL-5 barriers traffic characteristics Transportation Research Board travelway U.S.DOT UNIVERSITY Of Nebraska-LINCOLN Urban Arterial Urban Collector/Local Washington y-intercept