Norfolk and Western yard at Portsmouth, Ohio, is used exclusively for classifying loaded coal cars; automatic switching controls are on teletype tape which is punched for entire train before it is pushed to hump; regrouping of 35 tracks has reduced retarders from 26 to 7 and grade from 0.22% to 0.15, about 45 min being saved for each car.
Service improved by modernization of classification yard
Ry Signaling Communications
Railway Signaling and Communications ; 48 , n 9
1955
5 pages
Article (Journal)
English
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