基于交通流动态特性的交叉口复杂度模型研究  

Study on the complexity degree model based on the dynamic characteristics of traffic flow

作　　者：沈家军 王炜[2] 

机构地区：[1]扬州大学,江苏扬州225009 [2]东南大学,江苏南京210096

出　　处：《土木工程学报》2011年第5期131-135,共5页China Civil Engineering Journal

基　　金：国家973计划(2006CB705501);"十一五"国家科技支撑计划(2006BAJ18B07);江苏省自然科学基金(BK2010316);江苏省高校自然科学研究项目(10KJB580004)

摘　　要：为了综合衡量城市道路交叉口空间布局形式的复杂性及交通流运行的有序性,从宏观及微观两个层面建立复杂度模型。选取冲突点及冲突概率作为影响复杂度的主要因素,应用图示法及摄影测量方法阐述冲突点的求解过程,采用统计分析及曲线拟合的方法建立冲突概率的计算模型,通过具体算例求解不同空间布局形式的交叉口在不同交通需求下的复杂度数值。结果表明:对于同一类型交叉口而言,其复杂度随流量的增加而增加;对于同一流量条件而言,不同类型的交叉口其复杂度随车道数的增加而增加。复杂度是交叉口运行状态综合性的量化指标,可应用于城市路网的规划及交叉口的安全评价中。In order to completely measure the complexity of the spatial layout and orderliness of urban intersections,a complexity degree model was developed from macro and micro perspectives.Conflict point and conflict probability were selected as the two key factors,one of which was analyzed using the diagram method and photogrammetry principle,and the other determined by using statistical analysis and curve fitting.The complexity degree values of intersections of different spatial layout under various traffic demands were calculated.The results indicate that the complexity degree values of intersections of the same type increase with volume and those of intersections of different types increase with the number of lanes.Complexity degree is a comprehensive quantitative index showing the working condition of intersections,and can be applied to planning urban road networks and safety appraisal of intersections.

关 键 词：交通工程 冲突点 冲突概率 复杂度 交叉口 

分 类 号：U491.2[交通运输工程—交通运输规划与管理]