高等级公路线形连续性分析与评价

针对公路线形连续是保证汽车安全行驶的基本要求,结合某高速公路事故多发地段,提出了运行速度与设计速度合理匹配的路线设计理念,分析了高等级公路保证线形连续的条件,讨论了该高速公路事故多发地段(黑点路段)发生事故的原因。结果表明,确定公路几何线形参数必须做到运行速度与设计速度的匹配设计,一方面可保证路线所有相关要素如视距、超高、纵坡、竖曲线半径等指标与设计速度的合理搭配;另一方面,也考虑了公路上绝大多数驾驶员的交通心理需求,更能体现“以人为本”的交通理念。最后提出了满足道路交通安全需要的合理化建议。

Analysis and Evaluation of Highway Alignment Consistency

Highway alignment consistency is a basic requirement for driving safely.Based on a black spots of expressway,the route(design) idea of operating speed matched with design speed is put forward,the condition of highway alignment consistency is analyzed and the reasons for road accidents at the black spots are discussed.The result shows that a good alignment geometry parameter based on design speed matches with operating speed.On one hand,it can guarantee some route essential factors relevant to design speed,including sight distance,superelevation,longitudinal slope and the radius of vertical curve and so on,on the other hand,it considers most of drivers' travel mental demands and manifests the people oriented concept.Finally,some sugguestion for traffic safety is recommended.