公路隧道进出口行车安全评价指标应用研究

Evaluation Index's Application Studies on Safety at Highway Tunnel's Entrance and Exit

利用EMR-8B眼动仪系统，对公路隧道进出口50m范围驾驶员的瞳孔变化进行了试验研究．比较研究了各种试验条件下瞳孔反应的差异性，在大量试验基础上，建立基于驾驶员瞳孔面积变化速度及持续时间的行车安全评价指标：当瞳孔面积变化速度超出-6～4mm^2·s^-1范围，且持续时间大于0．2s时，行车不安全；反之则安全．并将该指标应用于隧道进出口行车速度的安全评价．

By using EMR- 8B eye tracker system, driver＇s pupillary changes at 50 m＇distance of tunnel＇s entrance and exit were selected as research object. Comparison study of pupillary response difference in various conditions was conducted. Based on driving experiments, the evaluation index of driving safety based on variety velocity of pupil area and duration time was proposed. According to the index,when the variety velocity of pupil area transcends the range from -6 to 4 mm^2 · s^-1, and duration time surpasses 0.2 s, driving is not safe, otherwise it is safe. The safe index was applied in the safe evaluation of driving speed at tunnel＇s entrance and exit.