The report summarizes research activities regarding the delineation of concrete safety-shaped barriers (CSSBs) in situations where the barrier is located close to the travel lane. Included in the report are a summary of current barrier delineation practices in Texas; review of past CSSB research; discussion of results of field studies of CSSB delineation treatments on urban freeways in Austin and Houston, TX; and discussion of several mechanisms suggested for cleaning CSSB delineators. Field study results at a lighted urban freeway site in Houston suggest that some delineation treatments may have a small effect upon the distance at which drivers travel from the barrier as compared to a no-delineation condition under nighttime dry-weather conditions. However, it was not possible to determine whether the effect is of practical significance in terms of traffic safety and operations. It was also found that dirt and road film affect delineation types differently.


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    Title :

    Delineation of Concrete Safety-Shaped Barriers


    Contributors:
    G. L. Ullman (author) / C. L. Dudek (author) / C. J. Allen (author)

    Publication date :

    1988


    Size :

    97 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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