Boston Elevated Railway, operating unified system of elevated, subway, and surface rapid transit lines, covering Boston, Mass, and vicinity, has converted three interlocking plants to semi-automatic operation under control of motormen; illustrations and diagrams given.


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    Title :

    Semi-automatic interlockings on Boston elevated


    Additional title:

    Ry Signaling


    Contributors:

    Published in:

    Railway Signaling ; 30 , n 2 ; p 94-95 + 97


    Publication date :

    1937


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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