基于交通冲突技术互通式立交最小净距研究

Research on Minimum Interchange Spacing Based on Traffic Conflict Technique

选择冲突数与交织区交通需求总量、交织区长度的比值即冲突率f作为交织区交通安全的评价指标,通过聚类分析将交织区的安全水平进行分级,采用模糊评价的办法将分级的安全水平进行量化,根据相邻互通式立交交织区构型和连接方式计算不同交织区长度下安全等级,在满足互通式立交区域目标安全等级的前提下,计算出近距离相邻的互通式立交最小合理间距.

Sections.Its traffic flow characteristics and geometric modeling are different from the sub-confluence areas of indicators.The ratios of the number of conflict zones to total traffic demand and the length of the weaving sections are adopted as the evaluation indexes of traffic safety.Cluster analysis is made to grade the security level and the fuzzy evaluation approach is employed for its quantification.According to the configuration and connectivity of the mixed areas of adjacent interchanges of different ways,the safety level of different weaving lengths is calculated.Finally,the minimum interchange spacing between adjacent interchanges connected by the support lane is computed for the target security level.