Specifications for construction of monolithic concrete crossings; methods of classifying grade crossings with respect to hazard; lamps on manual and automatic crossing gates; striping of crossing gates.
Report of committee 9 -- Highways
Am Ry Eng Assn -- Bul
American Railway Engineering Association -- Bulletin ; 41 , n 414
1939
8 pages
Aufsatz (Zeitschrift)
Englisch
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Report of committee 9 -- Highways
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