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Federal Highway Administration Research and Technology
Coordinating, Developing, and Delivering Highway Transportation Innovations

Report
This report is an archived publication and may contain dated technical, contact, and link information
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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