城市地下道路LED自发光指路标志视认性研究

摘要

城市地下道路交通标志的视认性对交通安全有着十分重要的意义.为了提高交通标志的视认性,通过室内仿真实验和实车实验对 LED指路标志的版面设计进行了评估.首先,在 DIALUX 软件中建立模拟测试场景,并对24 种不同字体颜色、字体大小、笔画粗细的标志牌进行视认实验,记录驾驶员的视认距离.其次,制作20 种不同尺寸、高宽比、笔画粗细和发光形式的 LED标志牌,在同济大学校园、西藏南路隧道和上中路隧道进行实车实验.最后,根据实验结果,以视认距离为依据,提出对设计速度为 60 km/h 的城市地下道路指路标志版面设计的优化设计建议.%The legibility of traffic signs in urban tunnels is of great importance on traffic safety.To improve legibility of traffic signs,this paper attempts to assess the siting and layout of LED traffic guide signs by simulation and field tests.First,the test scenarios were built in DIALUX software,where driv-ers'legibility distance were recorded with regard to twenty-four signs with different colors,font sizes,and contrast ratios.Then,to confirm the results from simulation,twenty LED traffic guide signs with dif-ferent layouts are designed.Different layouts were set up with varying sign sizes,height-width ratios,thickness of stroke and light emitting forms.By setting up those traffic guide signs,field tests are conduc-ted on Tongji University campus,South Tibet road tunnel and Shangzhong tunnel in Shanghai.Finally,according to the experimental results,the optimal design for urban tunnels with speed of 60 km/h is rec-ommended regarding legibility distance.