Research On Pick/Drop Stand Block Mitigation Based On The Coordinated Control Of Connected Vehicles

The typical scenes of " pick/drop stand " road sections,such as in front of schools and hospitals,have specific necessity in the road traffic system due to their special functional positioning.However,in reality,such road sections are often prone to congestion due to chaotic traffic order,and congestion generally arises from the bottleneck section and gradually spreads upstream,resulting in a decrease in the traffic efficiency of the entire section,and even paralysis of the regional transportation network.Currently,this type of road section mainly adopts the method of traffic management,but due to the destruction of the original functions to different degrees,it often brings inconvenience to users.The emergence and rapid development have provided new ideas and technical means for it.Therefore,this article takes the " pick/drop stand" section as the research object.Based on the analysis of its operating environment,traffic flow characteristics and vehicle driving behavior characteristics,this paper proposes a coordinated control strategy using the Internet of Vehicles technology to achieve the goal of not damaging the area.The purpose of alleviating congestion under the condition of road section function,while taking into account safety and comfort.Taking the road section in front of the hospital as an example,the thesis conducted a field investigation on the “pick/drop stand” section of the road.From the perspective of car-following and lane changing behavior,the functional areas of the road section were divided,and the traffic flow characteristics and driving of each functional area were divided.The behavior is systematically sorted out,and the coordinated control strategy of car following and lane changing in various scenarios is proposed.As the core content of the car-following coordinated control strategy,the paper takes the safety and ride comfort of the team as the optimization goals,and establishes a car-following coordinated control model based on the prediction of the terminal state of the leading vehicle,and outputs the coordinated control of the leading vehicle of the team.The curve improves the traditional particle swarm algorithm so that it can consider two optimization goals at the same time when updating the speed.The result shows that the improved algorithm converges quickly and obtains the optimal value.The paper proposes a coordinated control strategy for lane change based on the research scenario.The core content is to find the best area for the lane change location area.On this basis,the lane change safety of the fleet and the traffic efficiency of the road section are considered to establish lane change.Position decision model and solve.Finally,the paper uses VISSIM simulation and numerical simulation experiments to verify the proposed coordinated control strategy.The results show that when the proportion of connected vehicles is greater than 30%,the coordinated control strategy can effectively alleviate the congestion problem of the “pick/drop stand” section,and significantly increase the traffic speed of the section;in addition,when the proportion of connected vehicles is greater than 70%,coordinate the control strategy can effectively improve the driving safety and ride comfort of the traffic flow.