Revision of manual; highway-railroad grade crossing signs; design and specifications for highway crossings at grade over railway tracks, both steam and electric; "gates-not-working" and "watchman-not-on-duty" signs; barrier type of grade crossing protection, including automatic gates; outline of complete field of work of committee. (See also - discussion p 634-5)
Report of committee IX-highways
Am Ry Eng Assn -- Proc
1937
18 pages
Aufsatz (Zeitschrift)
Englisch
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