Operation of Pennsylvania Railroad's retarder classification yard that was converted from two rider hump yards; new 42-track yard has two master and six group retarders equipped with speed sensing units; yard handles 1200 to 1400 cars every 24 hr and has automatic route switching for prompt handling of cars into various class tracks; time saving procedure in yard is that departing eastbound train can be made up while westbound cars are pushed over hump for classification.
PRR converts two hump yards
Ry Signaling Communications
Railway Signaling and Communications ; 58 , n 11
1965
3 pages
Article (Journal)
English
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