Development continues in wider use of remote and centralized control, automatic interlocking at crossings, and replacement of semaphores by light signals. From Annual Signaling Statistics for 1942, issued by Am Interstate Commerce Commission.


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    Title :

    Signalling progress in U.S.A.


    Additional title:

    Ry Gaz


    Published in:

    Publication date :

    1943


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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