Analysis Of Vehicle Interaction Behavior And Stability Mechanism Of Urban Expressway

The sustained growth of the national economy has led to a “blowout” growth in vehicle ownership,and urban traffic is facing increasing pressure.Nowadays,the urban transportation land is getting more and more tense.The urban roads that have been built cannot make the citizens travel easily and quickly,but they cannot build new roads.Therefore,in order to solve the contradiction of traffic supply and demand and traffic congestion,and ease the traffic pressure,many cities plan to build cities quickly.Road to disperse traffic.Car-following and lane-changing driving behavior are two basic behaviors of vehicle operation.The car-following behavior has always existed in the traffic system.Studying the car-following behavior is the basis for ensuring the stable operation of the traffic flow,and the lane changing behavior is the result of the fast road traffic.One of the important reasons for the macroscopic traffic phenomenon such as shock,traffic shock,road traffic capacity and car loss stability.There is a certain correlation between the car-following behavior and the lane-changing behavior,and there are certain rules for switching between the two behaviors.The factors affecting the driving behavior of vehicles in the urban expressway transportation system are complex and changeable.The small disturbance may have a huge impact on the stable operation of the traffic flow.Therefore,in order to solve the contradiction of traffic supply and demand,traffic congestion and improve the safety of vehicle operation on the road,the mitigation Urban traffic pressure,it is necessary to study in depth the dynamic characteristics of vehicle heel and lane change behavior in the traffic system and the analysis and stability mechanism of fast road vehicle interaction behavior,and provide technical support for improving road traffic capacity and traffic safety.The car-following interaction relationship and the dynamic relationship between the molecules have great similarities.Therefore,based on the molecular dynamics theory,this paper takes the vehicle driving behavior in the fast road traffic system as the research object and constructs the vehicle room.The molecular follow-up model,and through the research and analysis of the model,studies the traffic flow cluster potential characteristics of the main line area affected by the fast road without convergence.Secondly,starting from the reasons for thechange of lanes,the paper analyzes the behavior of lane change and the feasibility of lane change,summarizes the factors affecting the lane change,and based on the minimum safe longitudinal distance model,incorporates the speed change of the lane change vehicle during the lane change.Factor,built a vehicle lane change model.The simulation results of the model show that the vehicle lane change model proposed in this paper can be more realistic,and provide a basis for studying the stable and safe lane change of vehicles,and lay a theoretical foundation for analyzing the macroscopic traffic characteristics.Then based on the classic FVD model,the driver behavior time,the lateral displacement of multiple vehicles and the type of lane change are considered to construct the vehicle behavior model.The influence of micro-vehicle chauff and lane change behavior on the expressway macro traffic flow is analyzed.The molecular follow-up theory is used to analyze the fast road traffic system to obtain the fluctuation characteristics of acceleration.The stability of the vehicle flow is analyzed from the longitudinal and lateral aspects,and the example is verified.Finally,in the multi-source fusion big data environment,the vehicle behavior model is calibrated and verified according to the measured data.The simulation method shows that the classic FVD-based vehicle flow model has higher stability and can better simulate actual driving.behavior.Further explore the influence mechanism of micro-vehicle driving behavior on macro-vehicle flow operation,and analyze the stability of traffic flow cluster operation,which provides theoretical basis and technical support for improving the stability of expressway traffic flow,relieving traffic pressure and realizing road-cooperative driving technology.