摘要
视觉信息对驾驶员采取正确的驾驶行为至关重要,是高速公路安全行车的基础。从驾驶行为理论和驾驶员的视觉特性出发,提出了预览视距的概念,用于量化驾驶员的视觉信息,构建了预览视距计算模型。以预览视距为切入点,根据多条既有山区高速公路的设计资料、实际运营数据和事故资料,通过理论分析和试验验证,探讨了驾驶行为中的预览视距与高速公路线形安全性之间的关系,提出了基于预览视距变化率的山区高速公路线形安全性评价指标,并通过运行车速修正,建立了山区高速公路线形安全性评价模型与评价标准。
Visual information that a driver adopts in the process of driving along the road is a key issue for a driver to take a correct driving behaviour for safety and also the basis of expressway traffic safety. Visual information is essential component for a driver to make appropriate maneuvers. According to driving theory and the visual characteristics of the driver, the concept of preview sight-distance to quantify the driver＇s visual information is put forward, and a preview sight-distance model is built. Investigating of a number of existing design data of expressways in mountain area, the actual operational data and accident information, together with a theoretical analysis and experimental verification, the relationship between alignment preview sight-distance and safety is discussed, and a safety indicator based on the preview sightdistance change rate in length is presented. With the modification by operatind speed, an alignment safety evaluation model and corresponding criteria are proposed for expressways in mountain area.
出处
《公路》
北大核心
2008年第12期22-26,共5页
Highway
基金
重庆市科委自然科学基金项目,项目编号:CSTC,2007BB6417
关键词
山区
高速公路
线形
预览视距
运行车速
安全评价
mountain area
expressway
alignment
preview sight-distance
operating speed
safety evaluation
