Revision of manual; drawings showing general requirements for installations of automatic gates; method of classifying grade crossings with respect to hazards; requisites for floodlighting of railroad-highway grade crossings; lamps on manual and automatic crossing gates; requisites for automatic crossing gates. (See also - discussion p 726-9)
Report of committee 9 -- Highways
Am Ry Eng Assn -- Bul
1939
513 pages
Aufsatz (Zeitschrift)
Englisch
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