Recognizing need for improvement in existing methods of traffic control, "Color-Design Signal" was invented, and is being installed at many intersections throughout United States; signal gives indication instantly understood by colorblind persons, and displays aspects so outstanding as to immediately arrest attention of motorist; signal indications.
Safeguarding motorist at intersection
Safety Eng
Safety Engineering ; 63 , n 2
1932
2 pages
Aufsatz (Zeitschrift)
Englisch
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