Typical sections; types of subway tracks; interlocking and permissive signals; cars; proposed concourse under and around City Hall. (See also Am. Soc. Mun. Improvements -- Proc vol. 35, Oct. 14-18, 1929 pp. 337-350, 10 figs (discussion) p 350, 10 figs)


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    Title :

    The broad street subway and Philadelphia's projected high-speed transportation system


    Additional title:

    Engrs. Eng


    Contributors:

    Published in:

    Publication date :

    1930


    Size :

    5 pages


    Remarks:

    5 Figs.


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English


    Keywords :


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