交通信息与安全2018，Vol.36Issue(1)：57-64,95,9.DOI:10.3963/j.issn.1674-4861.2018.01.008
基于单截面低频检测数据的信号交叉口排队长度估计
Estimation of Queuing Length at Signalized Intersections Using Low-frequency Point Detector Data
摘要
Abstract
Due to the limitation of traffic data collected at signalized intersections in most small and medium sized cities in China,estimation on queuing length at signalized intersections is with low accuracy.In order to solve this prob-lem,a model of estimating queue length based on data from low frequency,fixed-point,and single detectors at signalized intersections is proposed.A long queuing event(the end of a queue exceeds the position of the detector)is identified based on the relationship between occupancy,flow,and speed.Data of detectors is divided into cycles according to and synchro-nized with signal timing.The maximum length of queuing is calculated based on shock wave theory.A simulation test and a demonstration study are carried out at the south entrance lanes of Shandong road and Jiangxi road in Qingdao.The re-sult shows that identification accuracy of a long queue is above 90%.The average estimated accuracies of queuing length under different saturation(low,medium,and high)are all more than 80%,among which,the average MAE is lower than 20 m per cycle under medium and low saturation,and lower than 45 m per cycle under high saturation.关键词
交通控制/低频检测数据/排队长度/交通波/信号交叉口Key words
traffic control/low frequency detector data/queuing length/shock wave/signalized intersection分类
交通工程引用本文复制引用
李爱杰,唐克双,董可然..基于单截面低频检测数据的信号交叉口排队长度估计[J].交通信息与安全,2018,36(1):57-64,95,9.基金项目
国家自然科学基金项目(61673302)资助 （61673302）
