公路纵面视距行车安全性分析

驾驶员应有足够的视距来判断运行车辆前方环境发生的变化,如交通状况、道路线形组合形式及沿线景观设计等,以便采取相应措施确保汽车安全行驶。文章从道路纵面竖曲线设计原理出发,讨论了汽车安全行驶的条件,推导出停车视距与竖曲线设计长度、变坡角的关系,同时结合某高速公路安全性评价,对事故多发路段提出了合理化建议。

An Analysis on the Driving Safety Related to Longitudinal Sight Distance

The drivers are supposed to have sufficient distance in order to watch for the changes of the surroundings before cars such as traffic conditions,highway alignments,scenery design and so on,and to take corresponding actions to ensure driving safety.Based on the principle of the vertical curve design,this paper discusses the safe driving conditions on highways and obtains the relationship between the design length of vertical curve,stopping sight distance and algebra difference of grades.Combined with safety evaluation for one expressway,this Paper proposes some reasonable recommendations for black spot treatment.