Guidelines for Guardrail Implementation (2009) / Chapter Skim
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Pages 18-20
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From page 18... ...
18 The RSAP analysis began with a preliminary evaluation of a small subset of the 19,800 different roadway, roadside, and hazard combinations described in the previous chapter. Roadway and roadside conditions under which guardrail treatment of each of the six roadside hazards included in the study became cost beneficial were identified.
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From page 19... ...
go unreported. It is generally believed that cable median barriers are more forgiving than most guardrail systems and more forgiving barriers have a higher proportion of unreported crashes.
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From page 20... ...
because the capacity of a TL-4 barrier is only marginally greater than a TL-3 system. Further, the modest difference in height between TL-3 and TL-4 barriers limits the higherperformance barrier's effectiveness in reducing truck rollovers.
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