标志信息及驾驶时间影响驾驶员视觉特性分析

为定量分析长时程驾驶条件下，驾驶员视认草原公路直线段上不同信息量交通标志设施时，视觉特性的变化，以信息量化理论为基础，通过开展草原公路重复驾驶实验，分析不同标志信息量和驾驶时间耦合作用下驾驶员视认行为变化规律。结果表明：随着标志信息量的增加，两次重复实验中驾驶员扫视持续时间与注视持续时间都呈波动上升趋势，扫视平均速度都呈波动下降趋势；对于标志中的重复道路信息，驾驶员的视认行为会发生与以上相反的变化趋势；进行多项式拟合，依据拟合结果，进一步利用相关分析方法与独立样本检验，探究驾驶员视觉特性变化规律。

Analysis of the Influence of Sign Information and Driving Time on Drivers' Visual Characteristics

In order to analyze the changes of drivers` visual characteristics, they were arranged to experiment on the straight section of grassland highway. Based on the information quantification theory, drivers were designed to recognized different traffic signs under the condition of long-term driving. The drivers repeated driving experiments on grassland highway, under the coupling effect of sign information and driving time, the change law of drivers'' visual behavior was analyzed. The results show that with the increase of sign information in the two repeated experiments, the driver''s saccade duration and gaze duration fluctuate increase, and the average saccade speed fluctuates decreases; For the repeated road information in the guide signs, the driver''s visual recognition behavior changes in the opposite trend; According to the fitting results, the correlation analysis method and independent sample t-test are further used, in order to explore the change law of driver visual characteristics.