Fill light, used to helps cameras capture road traffic conditions at night, can lead to serious visual consequences for drivers. Research on disability glare from LED fill light is scarce and therefore this study explored strategies for controlling disability glare of constant-light LED traffic monitoring fill light. The threshold increment was used as an index to evaluate disability glare. The effective disability glare area of LED traffic monitoring fill light was determined based on high dynamic range technology. According to visual efficacy theory, there is a relationship between disability glare conditions and reaction times. The influencing factors include background luminance, luminance contrast and fill light luminance. The results showed that disability glare was the most intense in a range of 20 m to 30 m in front of LED fill light. To reduce the effect of disability glare on drivers, luminance contrast between small targets and the road surface should be greater than 0.5. The fill light luminance should not be greater than 100,000 cd/m².

补光灯用于帮助摄像机在夜间捕获道路交通状况，可能会给驾驶员带来严重的视觉后果。由于对LED补光灯的残障眩光的研究很少，因此本研究探索了用于控制恒定光LED交通监控补光灯的残障眩光的策略。阈值增量用作评估残疾眩光的指标。基于高动态范围技术确定了LED交通监控补光灯的有效残障眩光区域。根据视觉功效理论，残疾眩光状况与反应时间之间存在关系。影响因素包括背景亮度，亮度对比度和补光亮度。结果表明，在LED补光灯前方20 m至30 m范围内，残障眩光最为严重。为了减少残障眩光对驾驶员的影响，小目标与路面之间的亮度对比度应大于0.5。补光灯亮度不应大于100,000 cd / m²。