Abstract Night-time excessive luminance Outdoor LED display screens (OLDSs) are widely used in urban areas, which yield potential safety hazards to vehicle traffic at night. In this study, we evaluated the effects that coloured light projected from excessive luminance OLDS has on vehicle driving safety along urban roads at night. Based on road lighting environmental characteristics at night and using reaction time (RT) testing software under different white field luminance (WFL) conditions, the RTs for small targets (STs) with different colours of OLDS were examined. First, in combination with field tests, excessive luminance values of typical OLDSs at night (1,000, 3,000, and 5100 cd/m2) were determined; then, experimental simulation scenes were established by integrating real photos with software simulations. Next, the RT experiments were conducted, followed by obtaining the influences that different colours have on the RTs and visual missing dots (MD) under different WFL conditions. The results showed that, in addition to blue light, the coloured light of OLDSs can improve a driver's ability to recognise small targets and reduce RTs in the case of low WFL values, but the coloured light causes more missing dots and affects traffic safety. The findings also indicated that the night recognition abilities of females under the influence of projected OLDS coloured light was better than that of males.

中文翻译：

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夜间高亮度户外LED显示屏投射彩色光对城市道路车辆行车安全的影响

摘要 夜间高亮度户外LED显示屏(OLDS)在城市地区应用广泛，给夜间车辆通行带来安全隐患。在这项研究中，我们评估了从过度亮度 OLDS 投射的彩色光对夜间城市道路上车辆行驶安全的影响。基于夜间道路照明环境特征，利用反应时间（RT）测试软件在不同白场亮度（WFL）条件下，对不同颜色OLDS的小目标（ST）的RT进行了测试。首先，结合现场测试，确定了典型OLDS在夜间（1,000、3,000和5100 cd/m2）的过度亮度值；然后，将真实照片与软件模拟相结合，建立实验模拟场景。下一个，进行了 RT 实验，然后获得了不同颜色对不同 WFL 条件下的 RT 和视觉缺失点 (MD) 的影响。结果表明，除蓝光外，OLDS的彩光在WFL值较低的情况下，可以提高驾驶员对小目标的识别能力，降低RTs，但彩光会造成更多的漏点，影响行车安全。研究结果还表明，在投射 OLDS 彩色光的影响下，女性的夜间识别能力优于男性。在 WFL 值较低的情况下识别小目标并减少 RTs 的能力，但彩色光会导致更多的缺失点并影响交通安全。研究结果还表明，在投射 OLDS 彩色光的影响下，女性的夜间识别能力优于男性。在 WFL 值较低的情况下识别小目标并减少 RTs 的能力，但彩色光会导致更多的缺失点并影响交通安全。研究结果还表明，在投射 OLDS 彩色光的影响下，女性的夜间识别能力优于男性。