Research On Traffic Operation Characteristics And Capacity Of Bottleneck Section Under The Environment Of Vehicle Interconnection

Since the reform and opening up,with the rapid economic development,urban congestion has become an important factor restricting urban development.As one of the main sources of urban congestion,improving the traffic efficiency of bottleneck section is an important measure to improve the operation efficiency of the whole urban road network.Vehicle interconnection is an important branch of the Internet of vehicles,which means that the vehicles on the road can communicate and communicate with each other by installing signal transmitting devices and receiving devices on vehicles.The research on the traffic flow under the environment of vehicle interconnection plays a positive role in improving the overall operation efficiency of urban road network.This paper takes the bottleneck section of urban Lane reduction as the research object.Firstly,the following data of bottleneck section in vehicle interconnection environment and traditional environment are analyzed,and the static stopping distance and headway at different speeds are determined respectively,and the headway distribution model is fitted by MATLAB;secondly,through the analysis of UAV video,camera video and other data,the bottleneck section car in traditional environment is obtained Vehicle lane changing characteristics;and through the relevant equipment to simulate the vehicle interconnection environment,carry out the real vehicle test,obtain the vehicle lane change characteristics under the vehicle interconnection environment;through the obtained data,further obtain the impact relationship between vehicle interconnection environment and traditional environment vehicles in different lane change intervals on the vehicle speed of the target lane,and summarize the vehicle interconnection environment and traditional environment The minimum free lane changing headway and headway at different speeds.Secondly,based on the free lane change and forced lane change of the bottleneck section,this paper puts forward the capacity calculation method of the bottleneck section with the forced lane change rate as the influencing factor.Under a certain forced lane change rate,when the number of free lane changes provided on the main line exactly matches the number of free lane changes required by Lane reduction,the overall balance of the bottleneck section is achieved and the traffic capacity is the largest.Comparing the calculated value of the model with the actual value,the deviation is about 3.8%,which proves the effectiveness of the model.The results show that the calculated value of vehicle interconnection environment model is about 5% higher than that of traditional environment model.Finally,this paper designs the speed guidance model of the bottleneck section.By guiding the speed of the vehicles arriving at the bottleneck section,the time of the vehicles arriving at the bottleneck is more "uniform",which reduces the mutual influence of vehicle lane changing,and improves the traffic efficiency of the bottleneck section.Through the COM interface provided by VISSIM software,the speed guidance model is compiled into the micro simulation software,and the simulation is carried out Compared with the simulation results in traditional environment,it is concluded that the traffic efficiency of bottleneck section in vehicle interconnection environment based on speed guidance is higher than that in traditional environment.The simulation results show that the average congestion time of bottleneck section is reduced by 25%,the average upstream speed is increased by 37%,the peak delay time and total delay time are reduced by 38%,and the capacity is increased by 9.2%.