Method for estimation of vehicle queues length based on probability theory" />
intersection, vehicle queue length, probability theory, correction of starting time, speeddistance model,"/>
基于概率论的车辆排队长度测量方法
Abstract： In order to analyze the intersection traffic conditions better and provide data for traffic flow detection and traffic congestion identification, the vehicle queue length of intersection was investigated based on the probability theory.The number of vehicles into/out the intersection and time were used to fit vehicletime curve. The correction of starting time was established for revising the time from the vehicle driving into the intersection to the vehicle leaving the intersection.The speeddistance model was established to deduce the correction of starting time by analyzing the traffic flow status, and the calculation method of the vehicle queue length was deduced by the differential and integral calculus method.The Hongqi street and Huxi road intersection traffic data in Changchun city were taken as example, and the experiment was carried out to verify the method. The results show that the method can conveniently collect data with simple facility layout, which makes the method easier for largescale application.The relative errors of E of 14 time points in 16 time points are less than 6% in the queue length, which illuminates that the calculation method is accurate enough for the measurement of vehicle queue length of intersection.
