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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 is essential for drivers to take the correct driving behavior and is the basis for safe driving on the highway. Based on the theory of driving behavior and the driver’s visual characteristics, the concept of preview horizon is put forward to quantify the driver’s visual information and construct a model of preview horizon calculation. Taking previewing distance as the starting point, based on the design data, actual operating data and accident data of a number of existing mountainous expressways, the paper discusses the preview line of sight and the linear safety of expressway through theoretical analysis and experimental verification The linear safety evaluation index of mountainous expressway based on the rate of change of line-of-sight is put forward, and the linear safety evaluation model and evaluation criteria for mountain expressway are established by modifying the running speed.