Portable instrument, Night Visibility Meter, developed to measure directional reflectances of traffic paints and traffic signs for geometric conditions of night use; it is visual instrument operating on equality of brightness principal; inside instrument, 6-v automobile lamp is used as source, projection lens and mirror direct nearly parallel beam of light from this lamp toward sample panel.


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    Titel :

    Night reflectance of traffic paints and signs


    Weitere Titelangaben:

    Traffic Eng


    Beteiligte:
    Hunter, R.S. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    1947


    Format / Umfang :

    6 pages


    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




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