This paper describes the measurement methodology and system architection of reflection properties of wet road surfaces in the description form of r-table as defined by CIE 66-1984. The aim of the measurement is to improve the accuracy of luminance simulation in the application of outdoor road lighting, specificly for the raining condition. A segmented measurement process was defined and applied in the measurement, which successfully solved the issue of rapid attenuation of 'wetness' on the road surface that was measured. A new
parameter, namely 'drying time' is introduced to better reflect the dynamic change of reflection properties during and after the rain. The series of wet r-table with 'drying time' as classified label would be considered as practical design basis for optimizing the lighting solutions for the raining condition.
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| Number of Pages : | 10 |
| Published : | 10/23/2017 |
