TRAFFIC SIGNS CONSPICUITY IN URBAN ENVIRONMENT: A CASE OF LONDON

Abstract

The conspicuity of traf ic signs is crucial, as their purpose is to give drivers with directionand information. The ef ectiveness and ef iciency of a traf ic sign is determined by its visibility, legibility, and veracity of information for observers. This study recruited primarily postgraduate students as participants. The assessment was conducted as part of a controlled experiment. Methodused in this research is a controlled indoor experiment using a visual search task in which a randomorder of daytime and nighttime scenes are given within 200 milliseconds. Subjects were instructed toidentify any visible signs at the scene. Four variables, including the size/distance of signs, the complexity of the background, the luminance contrast, and the color dif erence, were utilized. The results reveal that the size of the sign influences its conspicuity. Sign conspicuity is likewise af ected by luminance contrast, however it may have a greater ef ect at night. The results may also showthat the impact of color dif erence between daylight and nighttime conditions is minimal. In as much as aportion of the parameter's value is based on visual evaluation, and the findings do not appear to have reached a statistically significant level, additional methodological refinement is required