为提高高速公路隧道群路段驾驶人行车安全，采用眼动仪等设备对被试驾驶人的瞳孔变化进行了试验研究，分析了隧道群环境光照度、隧道纵深与驾驶人瞳孔面积的相
关关系;提出隧道群路段“6 小段”划分方式，构建驾驶人瞳孔面积最大差值与隧道连接段长度之间的曲线模型． 结果表明:隧道群路段驾驶人瞳孔面积与环境光照度呈指数变化关系，上游隧道出口视觉明适应水平及连接段长度是影响下游隧道及整个隧道群路段视觉适应的主要因素． 最后，提出改善隧道群路段环境光照度的推荐值，建议当隧道间距小于50m 时，设置隧道连接段遮光棚或上游隧道照度渐变式出口;当隧道间距在 50 ～100m 之间时，设置下游隧道照度渐变式进口．

In order to improve the driver's safety in expressway tunnel groups,the eye-movement equipment is a- dopted to conduct a pupil variation experiment,and the relationship between the driver's pupil area and the ambient illumination as well as the longitudinal depth of the tunnel is analyzed.Then,a“six small”division method of tun- nel groups is proposed,and a curve model describing the relationship between the maximum difference of the driver's pupil areas and the connection length of the tunnel is constructed.The results indicate that there exists an exponential relationship between the driver's pupil area and the ambient illumination,and the visual light adaptation level and connection length of the upstream tunnel exit are the main factors influencing the visual adaptation of both the downstream tunnel and the whole tunnel group sections.Finally,the recommended values to improve the am- bient illumination of the tunnel group are put forward.It is suggested that,when the tunnel spacing is less than 50 m,the shading shed in the tunnel connection section or the illumination gradient exit of the upstream tunnel should be set,while within the range of 50 ～100m,the illumination gradient exit of the downstream tunnel should be set.