Crash tests were conducted to determine the impact behavior of median-mounted luminaire supports and secondary collisions of vehicles striking downed poles on a traffic lane. A relative hazard index was developed to describe the relative hazard created by the proximity and frequency of luminaire supports. It was concluded that a 20 degree impact by a 2900 lb vehicle at 45 mph would not cause a pole to encroach on the opposing traffic lane if the median is 40 ft. wide. A 4000 lb vehicle impacting at 25 degrees and 70 mph would cause a pole to encroach approximately 11 ft. into the opposing lane. Under both conditions, the impacting vehicle would cross into the opposing lanes and may be more of a hazard than the poles themselves. A medium size vehicle impacting a downed pole within the traffic lane presents no more hazard than the original impact. From a relative hazard standpoint, median-mounted luminaire systems produce less hazard than house-side systems for median widths of 30 ft. or greater. (Author)


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    Titel :

    Evaluation of Breakaway Lightpoles for Use in Highway Medians


    Beteiligte:
    N. E. Walton (Autor:in) / T. J. Hirsch (Autor:in) / N. J. Rowan (Autor:in)

    Erscheinungsdatum :

    1972


    Format / Umfang :

    62 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




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