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Publication Number: FHWA-HRT-04-138
Date: December 2005

Enhanced Night Visibility Series, Volume VII: Phase II—Study 5: Evaluation of Discomfort Glare During Nighttime Driving in Clear Weather

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APPENDIX I—LUMINANCE MEASUREMENTS FOR EACH GRID POINT


Table 13. Luminance measurements for calculation of adaptation luminance;
lateral positions are 1 through 4, left to right.
Distance from Vehicle (m) Luminance at Lateral Position 1 (cd/m²) Luminance at Lateral Position 2 (cd/m²) Luminance at Lateral Position 3 (cd/m²) Luminance at Lateral Position 4 (cd/m²)
80 0.02 0.03 0.04 0.06
75 0.02 0.03 0.04 0.06
70 0.02 0.03 0.05 0.08
65 0.02 0.03 0.05 0.07
60 0.03 0.03 0.05 0.08
55 0.03 0.04 0.05 0.08
50 0.04 0.03 0.05 0.11
45 0.04 0.04 0.05 0.08
40 0.05 0.04 0.09 0.16
35 0.07 0.10 0.13 0.18
30 0.09 0.12 0.16 0.19
25 0.13 0.13 0.21 0.25
20 0.20 0.17 0.27 0.33
15 0.24 0.41 0.46 0.36
10 0.11 0.52 0.58 0.45
5 0.03 0.20 0.36 0.43

 

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