Reflectorized railroad crossing signs, which motorists can read by night at distances up to one-fifth miles, are being erected by Baltimore and Ohio at approximately 1100 crossings in West Virginia; manufacturing procedure; three paint coats; stenciling by silk screen; cost of production.
Reflectorized crossbuck signs
Ry Age
Railway Age ; 133 , n 4
1952
3 pages
Article (Journal)
English
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