Microscopic Traffic Flow Modeling In Mixed Traffic Environment

With the growing maturity of intelligent connected technology,the trend of vehicle development is to realize networking and intellectualization in the future.In the process of realizing the networking and intellectualization,the non-connected vehicles in the traditional traffic environment will be gradually replaced by the connected vehicles.During this period,there will be a long transition period which includes both connected vehicles and non-connected vehicles.How to analyze the characteristics of mixed traffic flow scientifically is an urgent problem.This paper analyzes the difference of perception interaction between connected vehicles and non-connected vehicles to better understand the traffic flow characteristics in mixed traffic environment,and further explores the method to improve the performance of mixed traffic flow.The specific work of this paper is as follows:1.Regarding the mixed traffic flow environment including connected vehicles and non-connected vehicles,the car-following model for mixed traffic flow is establishedFirstly,taking the traditional car-following model as the analysis object,the modeling process and linear stability analysis process are reconstructed to analyze the factors that affect the car-following effect.Furthermore,the traffic flow model in mixed traffic environment is established by considering the differences of perception and interaction between connected vehicles and non-connected vehicles.2.Aiming at the linear stability analysis of the traffic flow model in mixed traffic environment proposed in this paper,the factors affecting the stability of the model are exploredFor the traffic flow model in the mixed traffic environment proposed in this paper,the linear stability analysis of the traffic flow model in the mixed traffic environment is completed by the small perturbation method.The MATLAB simulation software is used to carry out the stability conditions by the simulation experiment.Furthermore,the influence of connected information execution degree and connected vehicle penetration rate on the stability of the model is analyzed.3.Setting different spatial distribution scenarios of connected vehicles,and analogizing the traffic flow characteristics of each scenarioFirstly,in the mixed traffic environment of determining the total number of vehicles and the penetration rate of connected vehicles,considering the concentration degree and distribution area of connected vehicles,six spatial distribution scenarios of connected vehicles are set.Then,the influence of connected vehicle spatial distribution on traffic performance is analyzed.4.The proposed model is verified by real vehicle level experiments,and a set of connected information display platform is developed to assist the experiments.Through the experiments,the influence of spatial distribution of connected vehicles on mixed traffic flow is further verifiedOn the basis of theoretical research,further verification experiments are carried out at the level of real vehicles.By building the real vehicle experimental verification platform,the interaction function of motion state information between vehicles is realized,and the loading of model algorithm is completed.The experiment is carried out with the help of the network information display platform.By setting a variety of experimental scenarios to carry out experiments,the analysis of experimental data is obtained to verify the influence law of the spatial distribution of network-linked vehicles on mixed traffic flow...