Control of automatic highway grade crossing signals and devices; requisites for automatic gates used for protection of highway traffic at railroad highway grade crossing; highway grade crossing signals.
Committee VIII -- Highway grade crossing protection
Assn Am Railroads -- Advance Reports (Signal Sec)
1950
21 pages
Article (Journal)
English
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Committee VIII -- Highway grade crossing protection
Engineering Index Backfile | 1947
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 | 1938
Committee VIII -- Highway grade crossing protection
Engineering Index Backfile | 1939