Report details various design criteria specified for discrete-bulb, matrix, speed command sign; results of laboratory tests; interaction effects among criteria meeting design specifications.


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    Title :

    Some solutions of visibility and legibility problems in changeable speed command signs


    Additional title:

    Nat Research Council -- Highway Research Board -- Bul


    Contributors:
    Bauer, H.J. (author)


    Publication date :

    1962


    Size :

    9 pages


    Type of media :

    Report


    Type of material :

    Print


    Language :

    English




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