Headlamp beam usage by drivers at seventeen locations in the continental United States was analyzed. Information observed for each vehicle included; type of vehicle, number of headlamps, direction of travel, speed, initial beam usage, beam change in response to opposing vehicle, distance from opposing vehicle when beam change was accomplished. presence of leading vehicle, and trailing distances. Observations were made at selected test sites in fifteen states and included: fourteen unlighted, rural, two-lane sections (one repeated); one unlighted, suburban, two-lane section; one unlighted, suburban four-lane section with depressed median; and one suburban, two-lane section with overhead lighting. BPR
Headlamp Beam Usage on U. S. Highways
1968
88 pages
Report
Keine Angabe
Englisch
Road Transportation , Industrial Safety Engineering , Passenger vehicles , Motor vehicle operators , Lighting equipment , Behavior , Night vision , Attitudes , Statistical data , Site selection , Roads , Environment , Traffic , Weather , Performance(Human) , Analysis , Visibility , Mathematical prediction , Headlamps , Glare
High-Beam Headlamp Usage on Unlighted Rural Roadways
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