Abstract
LED-based billboards are becoming increasingly popular due to their low cost, flexibility, and efficiency. On another side, the too-bright digital billboard may pose a potential threat to road safety. The driver’s perception of advertising depends on the different factors, including the billboard’s luminance value. The aim of the study was to develop the assessment method for the digital screen parameters (luminance or illumination) which could be applied by supervising authorities, using budget-friendly devices, such as a lux meter and could be used during the billboard active operation. We tested the recommended method of OAAA and concluded that it is not applied for large billboards (over 25 square-meter) due to the calculated far distance and low sensitivity of lux meter. We have developed the new method based on driver discomfort glare and De Boer ratio. The ratio helps to determine how likely a display is to cause discomfort to those around it. The lower the value, the less discomfort the driver will experience from the billboard. The new method is applied for the active and different size billboard and using lux meter that is not an expensive device. Moreover, we take into account the glare effect of billboard on drivers’ vision.
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