Safety barriers limit the severe consequences to occupants of vehicles leaving the roadway from colliding with obstacles, yet they may significantly reduce the available sight distance ( A S D ). A procedure was devised to accurately recreate highway guardrails in three dimensions (3D), fitting the barriers onto the curve roadsides. The effect of these devices on the reduction of the A S D was thus evaluated in a set of case studies comprising different curve radii overlapped with different vertical alignments and combined each with two safety barriers in two-lane rural roads. The 3D models of highway curves with the selected guardrails were created in a geographic information system. Then, a geoprocessing model was used to compute the A S D . The results made it possible to quantify the A S D reduction produced by the barrier with a higher containment level in relation to the highway design parameters, which can assist authorities in developing more comprehensive safety device standards.


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    Title :

    3D Modeling of Highway Guardrails for Sight Distance Assessment


    Contributors:


    Publication date :

    2021-08-26




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    Unknown



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