A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Direct Reading portable photoelectric photometer for determining reflectance of highway centerlines
Development of reflective centerline marking material required means of evaluating reflection obtained with beaded materials as compared to conventional highway striping paints; photometer can be used on highway in daylight for evaluating night brightness of highway centerline stripes; reflectance value can be obtained in less than 2 sec; miniature light source illuminates small section of area being examined.
Direct Reading portable photoelectric photometer for determining reflectance of highway centerlines
Development of reflective centerline marking material required means of evaluating reflection obtained with beaded materials as compared to conventional highway striping paints; photometer can be used on highway in daylight for evaluating night brightness of highway centerline stripes; reflectance value can be obtained in less than 2 sec; miniature light source illuminates small section of area being examined.
Direct Reading portable photoelectric photometer for determining reflectance of highway centerlines
Am Soc Testing Matls -- Bul
Hill, J.M. (author) / Ecker, H.W. (author)
1949
4 pages
Report
English
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