To expedite classification of freight cars, and move trains through Pueblo (Colo) Yard promptly, Denver and Rio Grande Western has installed 54 2-way and 20 paging loudspeakers for direction of switching crews; provision made for control by one or two yardmasters.
Loudspeakers -- Rio Grande style
Ry Signaling Communications
Railway Signaling and Communications ; 42 , n 5
1949
6 pages
Aufsatz (Zeitschrift)
Englisch
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