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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    Title :

    Photo cells control Detroit bridge traffic


    Additional title:

    Electronics


    Contributors:
    Cooper, B. (author)

    Published in:

    Electronics ; 1 , n 3


    Publication date :

    1930


    Size :

    3 pages


    Remarks:

    6 Figs.


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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