Description of loudspeaker communication system in Roper Yard of Denver and Rio Grande Western, Salt Lake City, Utah, which provides 2-way communication between yardmasters in elevated towers and yard crews working near talk-back speakers located along leads and at other strategic points; monitoring loudspeakers are located in yard office and in office of assistant superintendent. (See also Ry Age v 122 n 12 Mar 22 1947 p 594-5)
Loud-speakers on Rio Grande
Ry Signaling
Railway Signaling ; 40 , n 3
1947
6 pages
Article (Journal)
English
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Engineering Index Backfile | 1947
Loud speakers aid yard operation
Engineering Index Backfile | 1944
Loud speakers aid yard operation
Engineering Index Backfile | 1944
NTRS
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