Traffic and toll-collection use of photoelectric cells on new international bridge at Detroit; at different points on bridge approaches, photo cells indicate and register movement of cars; compared with former ticket-collection methods, this photo-cell plan has eliminated 20 men from operating payroll; details of system. (see also Eng. News Rec., vol. 104, no. 24, June 12, 1930, pp. 974-975, 3 figs.)


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    Titel :

    Photo cells control Detroit bridge traffic


    Weitere Titelangaben:

    Electronics


    Beteiligte:
    Cooper, B. (Autor:in)

    Erschienen in:

    Electronics ; 1 , n 3


    Erscheinungsdatum :

    1930


    Format / Umfang :

    3 pages


    Anmerkungen:

    6 Figs.


    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




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