Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Highways division designs new traffic signal blackout unit
Description of device developed in California which is installed on traffic lights and diffuses light from signal so that all light was cut off within vertical distance of 5 ft when viewed 500 ft from signal. (see also Am Highways v 21 n 4 Oct 1942 p 11-3)
Highways division designs new traffic signal blackout unit
Description of device developed in California which is installed on traffic lights and diffuses light from signal so that all light was cut off within vertical distance of 5 ft when viewed 500 ft from signal. (see also Am Highways v 21 n 4 Oct 1942 p 11-3)
Highways division designs new traffic signal blackout unit
Calif Highways Pub Works
Simmons, A.E. (Autor:in)
1942
Aufsatz (Zeitschrift)
Englisch
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Highways division designs new traffic signal blackout unit
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