中文摘要：

计算不同道路环境下驾驶员所获得的视觉信息负荷，解析导致车辆在不同道路环境下存在运行特征差异的机理，提高地下道路技术设计和运营管理水平,应用实车试验技术获取地上和地下道路环境中车辆运行特征数据和视觉环境资料，进行不同道路环境系统中车辆运行特征和驾驶员视觉信息负荷的对比研究，分析视觉信息负荷对车头间距和运行车速等车辆运行特征的影响规律．在此基础上深入研究了地下道路视觉环境影响驾驶员视觉信息负荷的机理．最后通过模拟驾驶技术提出了完善和提高地下道路视觉环境交通安全性的技术措施．

英文摘要：

Driver visual information load in different road environments was calculated and the mechanism of vehicles operating characteristics affected by different road environments was analyzed in order to improve the underground road technical design and operational management. First, vehicle operating characteristic and visual environment information were collected by naturalistic driving on underground and aboveground road. A comparative study was carried out on the vehicle operation characteristics and driver visual information load. The relationship between the visual information load and the vehicle operation characteristics （headway space and operating speed） was investigated. Then, an analysis was made of the influence mechanism of vehicles operating characteristics affected by visual environment in underground road. Finally, themeasures to improve the underground traffic security was proposed based on a driving simulation.