Influence of various angles and distances on luminance measurement results

The behaviour of drivers in nocturnal conditions is primarily influenced by the early detection of obstacles within the roadway. A reliable approach to evaluate night-time traffic environments is through luminance analysis. This study aimed to investigate the impact of conducting luminance measurements at reduced distances compared to those specified by standard guidelines. Additionally, the study examined the effect of the measurement angle of the luminance analyser on the recorded luminance values. The findings indicate that the measurement angle is a critical factor for ensuring accurate luminance readings, while the distance between the analyser and the measured surface has minimal influence on the results. Statistical analysis confirms that reliable data can be obtained even when deviating from standard measurement conditions. These results suggest that luminance analysis is feasible and applicable across a wide range of traffic scenarios.