Research Of Signal Intersection Right-Turn Control Strategy

Congestion causes various problems in the global ground transportation system.As new road construction or expansion is subject to more and more restrictions,traffic management and control systems under Intelligent Transportation Systems(ITS)have become more and more important to improve the efficiency and safety of traffic operations.Comprehensive optimization of time and space plays an important role in optimizing traffic management plans,balancing traffic flow,and alleviating traffic congestion.With the increasingly serious mixed traffic situation,right-turn traffic has also been paid more and more attention.How to safely and effectively control the rightturning traffic,and setting up a right-turning dedicated lane and right-turning phase is one of the keys to ensuring smooth traffic flow at intersections.This paper takes a typical four-phase cross-signal intersection as the research object.By analyzing the traffic operation characteristics of right-turning vehicles in a straight-right mixed lane and a right-turning dedicated lane,based on the principle of space optimization and the theory of variable lanes,this paper proposes The variable right-turn lane setting method realizes the dynamic control of the right-turn lane,and makes up for the shortcomings of the insufficient utilization of the right-turn or straight lanes caused by the fixed turning lane at the intersection.It is helpful to improve the utilization rate of the entrance lane and the signal control efficiency,and reduce the number of vehicles.Queue length and driving delays are of great significance.Based on the applicability,advantages and disadvantages of the existing delay model,as well as the setting conditions of the right-turn lane,considering the impact of different entrance lane conditions and different straight right-turn traffic,the average delay model of the entrance lane vehicle was established,and the average vehicle delay model was obtained under different traffic conditions.The lane attribute changes the threshold curve to provide a basis for the variable right-turn lane setting.Subsequently,it briefly introduces the setting form and precautions of the right turn phase,discusses the advantages and disadvantages of allowing RTOR and prohibiting RTOR,analyzes in detail the traffic operation characteristics of pedestrians and right-turning vehicles,and summarizes the acceptable gap theory and conflicts.Theoretical and right turn phase setting conditions.Through the establishment of a human-vehicle system model,the right-turn critical flow rate and timing plan basis are provided for determining the right-turn phase setting.Then,through the analysis of the capacity of the right-turn dedicated lane and the capacity of the exit road,and the calculation of the calculation examples,further requirements are put forward for the right-turn phase setting conditions to obtain a more accurate and comprehensive phase setting plan.Finally,taking the cross-shaped signalized intersection of Baishazhou Avenue and Batan Road in Wuhan as the research object,the traffic model is constructed using VISSIM simulation software,and the basis for setting the right-turn lane and the setting conditions of the right-turn phase are simulated and verified.By evaluating and analyzing the comparison schemes,it is found that the variable right-turn lane setting basis and right-turn phase setting conditions studied in this paper are valid for the intersections to which they are applicable.