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本文采用瑞典VTI交通模拟模型研究两车道公路上超车视距对行车速度的影响,提出了部分结果.结果表明视距和超车密度(超车次/公里·小时)、超车密度和行车速度有十分密切的关系.研究结果可用于评价两车道公路的服务水平及检验和建立二车道公路的几何设计标准.最后建议超车视距应在两车道公路规划和设计中作为一条基本的考虑因素.超车道、爬坡车道和铺砌路肩由于能提供良好视距,因此都是新建和改建道路时应考虑的方案.
In this paper, the VTI traffic simulation model of Sweden is used to study the effect of passing distance on two-lane road on the driving speed, and some results are presented. The results show that the apparent distance and passing density (overtaking times / km / h) .The results can be used to evaluate the service level of two-lane highway and to test and establish the geometric design standards of two-lane highway.Finally, it is suggested that the passing sight should be a basic consideration in two-lane highway planning and design.Over lane, Grade lanes and paved shoulders, which provide good visibility, are all solutions that should be considered when building and rebuilding roads.