Revision of Requisites for automatic gates; requisites for "No Right Turn" and "No Left Turn" signs for crossings; methods for focusing and aligning railroad highway grade crossing flashing light signals in field.
Committee VIII -- Highway grade crossing protection
Assn Am Railroads -- Advance Reports (Signal Sec)
Association of American Railroads -- Signal Section -- Advance Reports ; 44 ; p 251-A -- 261-A
1947
Report
English
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Committee VIII -- Highway grade crossing protection
Engineering Index Backfile | 1938
Committee VIII -- Highway grade crossing protection
Engineering Index Backfile | 1948
Committee VIII -- Highway grade crossing protection
Engineering Index Backfile | 1950
Committee VIII -- Highway grade crossing protection
Engineering Index Backfile | 1946
Committee VIII -- Highway grade crossing protection
Engineering Index Backfile | 1939