Chesapeake and Ohio grade crossings in downtown Richmond, Va; color-light signals govern switching movements at industries and freighthouse where streets carry heavy vehicular traffic; two-way radio aids watchman to control traffic lights and railroad signals. (See also Ry Age v 138 n 6 June 27 1955 p 34-6)
Traffic lights protect crossings
Ry Signaling Communications
Railway Signaling and Communications ; 48 , n 5
1955
5 pages
Article (Journal)
English
© Metadata Copyright Elsevier B. V. All rights reserved.
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