Practices and recommendations in new 50-page ASA Standard, American Standard Practice for Roadway Lighting, are discussed; recommendations range from 2 ft-c for heavily traveled urban installations, down to 0.2 ft-c for some local roads; ratio of average brightness to minimum brightness on freeways is set at 3 to 1; important finding is that lamp output may be cut 30 to 50% by road film and dirt.
Roadway lighting
Civ Eng (NY)
Civil Engineering (New York) ; 34 , n 10
1964
2 pages
Aufsatz (Zeitschrift)
Englisch
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