Transmitter and receiver features of portable communications system developed by General Motors Corp, Warren, Mich, which supplements road signs, and aids driving safety by bringing into vehicle voice messages pertaining to emergency road conditions; system uses electromagnetic induction field for signal propagation and operates at frequencies near 10 kc, thereby avoiding radio interference; system requirements; military and national emergency applications.


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    Title :

    New voice system alerts drivers


    Additional title:

    Traffic Eng


    Contributors:
    Quinn, C.E. (author)

    Published in:

    Publication date :

    1959


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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