逆光条件下交通标志的可视距离研究

交通标志的视认直接影响行车安全。将眼动仪EMR-8B应用到交通安全研究领域中，从影响交通标志视认性的外部因素出发，以大量的现场行车实验为研究手段，探讨了在不同行车速度下，光线条件对交通标志可视距离的影响。并进行了相关性分析。研究结果表明，交通标志的可视距离随车速的提高而降低；同一实验车速，顺光条件下标志的视认性最佳，其次为夜间反光标志，逆光条件下的标志视认性较差。

Research on Traffic Sign Discemible Visual Range under Bacldighting Condition

The visibility of traffic sign directly affects driving safety. Based on large humors of driving experiments with EMR-8B as test apparatus, the influence of lighting condition to traffic sign visibility distance is studied under different driving speeds, then the relativity among risibility distance, driving speed and lighting condition is analyzed. Traffic sign discernible visual distance reduces with the increase of driving speed under the same lighting condition.As for the cognition of traffic sign under different lighting conditions it is the best under normal lighting condition, followed by the nighttime, and poor under hacldighting condition.