Sys-tem whereby flow of automobiles at intersection operates traffic lights; first automatic control installed in New Haven, Conn.; device which may be attached to existing lights to make them fully automatic and independent of manual adjustment or switching; no unnecessary delays when traffic is light; method of operation.
Traffic regulated by automatic control
Yale Sci. Mag
Yale Scientific Magazine ; 3 , n 1
1928
2 pages
Aufsatz (Zeitschrift)
Englisch
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