摘要
为有效评价单交叉口处的运行状态,从而为交通管控方法的制定提供依据,研究了一种基于多指标融合的单交叉口运行状态实时评价方法。通过研究视频检测技术可获取的实时交通参数,确定了流量比、车速比、空间占有率和排队长度比4个评价指标。运用层次分析法计算出各指标权重;借鉴可拓物元法框架,构造交叉口待评物元矩阵,计算其关联系数,结合各指标权重,得到综合关联度,即交叉口运行状况评价得分。以徐州丰县的交叉口为例,运用Vissim仿真获取不同交通状态下的交通参数,应用上述方法进行交叉口运行状态评价,结果显示该方法能有效反映交叉口运行状况,具有良好的实时性和应用可行性。
In order to effectively evaluate operational state for isolated intersections,then to provide a basis for traf⁃fic management and control methods,a real time operational state evaluation method for isolated intersections based on multi-index fusion is established.Based on traffic parameters available through video detection,four performance indicators are determined as flow ratio,speed ratio,space occupation ratio,and queue length ratio.The weights for the performance indicators are selected using analytic hierarchy procedure based on scores given by experts.After⁃ward,according to material element evaluation framework,a matter element matrix to be evaluated is constructed,the correlation coefficient is calculated,and combined with the index weight,the comprehensive degree of correla⁃tion,i.e.,the final score of the intersection operational state,is generated,finally realizing the multi-index fusion based real time isolated intersection operational state evaluation.Taking intersections in Feng Xian,Xuzhou as case studies,the proposed method is applied and validated using traffic data generated using Vissim software under differ⁃ent traffic volume levels.The results show that the proposed method can reflect the actual operation states of the inter⁃sections,with desirable real-time and practical applicability.
作者
蒋欢昕
王涛
程一一
郭建华
JIANG Huanxin;WANG Tao;CHENG Yiyi;GUO Jianhua(Intelligent Transportation System Research Center,Southeast University,Nanjing 210018,China;Traffic Police Corps,Department of Jiangsu Provincial Public Security,Nanjing 210049,China)
出处
《交通信息与安全》
CSCD
北大核心
2020年第4期84-94,共11页
Journal of Transport Information and Safety
基金
国家自然科学基金项目(61573106)资助。
关键词
交叉口
实时评价
评价指标
权重
多指标融合
intersection
real time evaluation
performance indicator
weight
multi-index fusion
