During redecking of bridge across Sacramento River, signals to stop traffic were used instead of flagmen thus saving 45% of cost; operator was placed in position so that he could see traffic from both directions and to control movement of traffic with minimum amount of lost time.
Traffic signals
Calif Highways Pub Works
California Highways and Public Works ; 28 , n 7-8
1949
Article (Journal)
English
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NTIS | 1973
|TIBKAT | 1931
|Engineering Index Backfile | 1966
|Engineering Index Backfile | 1936
|Engineering Index Backfile | 1928