| In recent years,with the rapid development of expressways in my country,the networked toll collection system has gradually matured and become a core component of the expressway intelligent transportation system.The toll collection system collects a lot of data during the toll collection process.How to maximize the use of these data,study the characteristics of expressway traffic flow,and improve the capacity and service quality of toll stations are currently hot topics in the field of highway intelligent transportationBased on the expressway toll data,this paper analyzes the expressway traffic flow characteristics from the aspects of expressway traffic flow time distribution characteristics,vehicle travel speed,and traffic density.By using the theoretical calculation method and system simulation method of traffic capacity,the theoretical calculation and system simulation verification of ETC and MTC lane capacity are analyzed respectively,and the optimized design plan of the hybrid toll station is proposed,which provides a reference for the vigorous promotion and practical application of the ETC system.The research content mainly includes:(1)Charge data preparation and pre-processing.Import the original data in Excel format into my SQL database,and then preprocess the data by repairing incomplete data,simplifying redundant data and correcting error data.At the same time,the pre-processing data are processed to reduce the noise and get relatively accurate basic data,which lays the foundation for the subsequent traffic flow characteristics analysis and capacity research.(2)Analysis of traffic flow characteristics of toll data.Based on the expressway toll data,the paper analyzes the characteristics of expressway traffic flow from the aspects of time distribution characteristics of expressway traffic flow,vehicle travel speed,traffic density,etc.Firstly,the paper analyzes the time distribution characteristics of expressway traffic volume from three aspects: time variation,daily variation and weekly variation.Then according to different statistical forms(by week and by 24 hours),the distribution characteristics of vehicle travel speed are studied.Finally,combined with the characteristics of the relationship between the three parameters of traffic flow,the average traffic density of the selected section and the average traffic density of single lane are analyzed.(3)Research on toll station capacity.Using the theoretical calculation method,the traffic capacity of etc lane and MTC lane is calculated and studied,and the total traffic capacity of mixed toll station is determined.Through the VISSIM simulation system,the simulation model is established to simulate the traffic capacity of etc single lane,etc multi lane and toll station,and the theoretical calculation results are compared with the simulation results to verify the consistency of the model.Finally,according to the research results,the optimal scheme of etc Lane configuration in hybrid toll station is proposed. |
