Guardrail and guardrail terminals are frequently installed over curbs. However, in recent years, the safety performance of these systems has been a concern for researchers and designers. The evaluation of the myriad of potential effects of curbs adjacent to longitudinal barriers is a significant undertaking. Therefore, the objective of this research study was to study the effects of curb placement adjacent to a W-beam longitudinal barrier when impacted by a 3/4-ton pickup truck. A guardrail/curb combination was evaluated according to the Test Level 3 (TL-3) safety performance criteria provided in NCHRP Report No. 350. In an effort to reduce the scope of the research study, one standard-size curb geometry was selected for testing. For the research study, the member states of the pooled fund program chose an 102-mm high by 203-mm wide triangular shape, mountable curb. An 102 mm rather than a 152-mm high curb was selected; since, it offered an increased potential for meeting the safety standards while also providing an acceptable level of hydraulic capacity.


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    Title :

    Guardrail And Guardrail Terminals Installed Over Curbs. Phase II


    Contributors:
    K. A. Poivka (author) / R. K. Sicking (author) / J. R. Rohde (author) / J. D. Reid (author) / J. C. Holloway (author)

    Publication date :

    2001


    Size :

    76 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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