双向六车道高速公路立交安全间距研究

摘要

采用 VISSIM 仿真软件，对双向六车道高速公路相邻立交接入点净间距与行车冲突之间的关系进行了仿真分析。以冲突率为行车安全的评价指标，建立冲突率与接入点间距之间的关系模型。再根据冲突率安全阈值，确定不同设计速度下的双向六车道高速公路相邻立交安全间距，为高速公路规划设计提供了参考。%The relationship between the access point spacing of the six-lane expressway and traffic conflicts was simulated with the VISSIM micro-simulation software.By using traffic conflict rate as the evaluation index of traffic safety,the relationship between the traffic conflict rate and the interchange spacing was then established.The safety values of the inter-change spacing on the six-lane expressway are given on the basis of the safety threshold of traf-fic conflict rate,which can provide a reference for the six-lane expressway plan and design.