Increasing seriousness of railroad grade crossing problems in United States; railroad motor vehicle accidents in United States, 1935; operating crossing signals; flexibility of control possible by using same single time element relay with different lengths of track circuits; educating motorist. Before Inst Traffic Engrs.


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    Title :

    Modernizing railroad grade crossing protection


    Additional title:

    Roads Streets


    Contributors:

    Published in:

    Publication date :

    1937


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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