| With the continuous development of urban transport technology,traffic demand increases,which makes urban traffic become more congested,especially the road blockage,resulting in more and more time cost and economic losses.Related scholars and experts actively adopt technical means and measures,aimed at easing traffic congestion and improving road capacity.At present,the research on intelligent transportation system has become the main trend of road traffic management and the important means to solve the increasingly serious traffic problems.Urban traffic control system is one of the important ways to improve the efficiency of urban traffic,and it is also a sign of urban traffic modernization and intelligence.According to the theory of traffic engineering,the queuing length of the intersection of the signal intersection is the same as that of other evaluation of the intersection control effect,which can visually reflect the traffic flow at the intersection.The queuing length plays an important role not only in evaluating the existing signal timing scheme,but also in the analysis of the effectiveness of the improvement measures at the intersection.The present research,based on queue length,introduces the domestic and foreign research background and the adaptive control method,and expounds the significance and research background of the phase green time queue length on adaptive traffic control.In order to optimize the single intersection signal control scheme,which can adapt to various import directions of the dynamic change of traffic flow and improve the efficiency of intersections,the present study,Based on the analysis of the status quo of research at home and abroad,this paper takes the control of crossroads in urban traffic signal control system as the research object,and puts forward a control rule of the right of passage between primary and secondary roads.Based on the queuing length And the validity and rationality of the method are verified by an example.Firstly,according to the requirements of fleet identification method,a new detector embedding method is obtaining the data needed to construct the equivalent length model from the traffic flow data.Based on the theory of two-flow theory,the actual traffic flow is divided into the traffic flow and the traffic flow.Based on the energy conservation equation,the queuing length model of the single-lane section and the multi-lane section are established respectively.Secondly,in order to evaluate the performance of the intersection,this paper adopts the comprehensive evaluation method of traffic,and selects the fuzzy comprehensive evaluation method,and the evaluation index is chosen the average delay time for vehicles,saturation and queuing length of the vehicle.In order to determine the weight of the evaluation index,through the expert experience method,and in order to ensure the rationality of its weight index,this paper carries out the threshold analysis before the evaluation,the analysis process is provided to the expert as a background information for expert scoring.Finally,expert determine the weight through the consistency test,and then fuzzy comprehensive evaluation determine the final system of reviews.Next,this paper presents an adaptive control method of signal intersection phase based on queue length.And the method is applicable to the main intersection of a road intersection,with a cycle of equivalent queue length change on the basis of the green phase,reducing the total traffic delay and highlighting traffic capacity of intersection.Finally,the work of this paper is summarized including innovation and unreasonable contents,the future research directions are pointed out. |
