Guidelines for guardrail implementation
Dean Sicking, Karla A. Lechtenberg, Scott Peterson, National Research Council (U.S.). Transportation Research Board, National Cooperative Highway Research Program, American Association of State Highway and Transportation Officials, United States. Federal Highway Administration
Transportation Research Board, 2009 - Technology & Engineering - 30 pages
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AASHTO appropriate guardrail test associated average crash cost B/C ratio barrier test level beneﬁt-to-cost analysis beneﬁts Cooper cost beneﬁcial crash data crash frequencies curvature development of guardrail encroachment frequency encroachment probability models Engineering estimated evaluation Federal Highway Administration Federal Railroad Administration FHWA ﬁndings ﬁve ﬂat 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 identiﬁed 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 signiﬁcantly site-speciﬁc speciﬁc sufﬁcient terrain Texas Transportation Institute tion TL-5 barriers trafﬁc characteristics trafﬁc volume Transportation Research Board travelway U.S.DOT Urban Arterial Washington Wide Any Narrow y-intercept