Study On Acceleration Fluctuation Characteristics And Stability Mechanism Of Vehicle Flow

Road traffic operation is similar to the fluid flow in the cluster road also has similar characteristics and fluid fluctuation process,flow fluctuation is caused by fluctuations in the speed,but the most fundamental reason is the acceleration of the speed fluctuation fluctuation,therefore,research on traffic flow characteristics and velocity fluctuations in the definition and has important the academic value and practical significance of traffic state analysis.The topic of National Natural Science Fund "road traffic running acceleration fluctuation characteristics and stability mechanism",the acceleration fluctuation characteristics of traffic flow and the mechanism of its stability,the main research contents are as follows.First,the traffic information collection system is analyzed.System design vehicle flow information collection system,layout various types of traffic detectors for information collection.Secondly,the microscopic dynamic characteristics of traffic flow are analyzed.The microscopic dynamic parameters of vehicle flow include the headway,headway,speed and acceleration,and the association characteristics between the mining parameters,and then reveal the microscopic dynamic characteristics of the traffic flow.Thirdly,the characteristics of vehicle flow acceleration fluctuation.Based on the molecular car following characteristics of vehicle flow,the internal fluctuation characteristics of vehicle flow are revealed,and the quantitative model of the characteristics of CVS acceleration fluctuation based on molecular dynamics is presented.At last,the mechanism of vehicle flow stability is studied.By using molecular dynamics theory,the dynamic characteristics of the micro flow and vibration characteristics based on the description of the traffic flow from a macro perspective,in a dynamic analysis method of traffic flow,to reveal the stability of vehicle operation mechanism.Based on the experimental data of the section traffic flow on the Binhai Road of the West Coast Economic Zone of Qingdao,the research results can provide scientific theory and method basis for the effective organization of the traffic flow and the improvement of the operation efficiency.