Parameters Calibration And Test Research Of Microscopic Traffic Simulation Model

With the rapid development of China’s social economy, the automotive industry and urbanization, China’s urban residents per capita car ownership was rapidly increasing. However, urban traffic network conditions improve slowly, making the city road traffic climbed rapidly. Meanwhile urbanization caused by a large number of foreign workers gathered to the city, it is further exacerbated the problem of urban traffic. Traffic problems restricting urban development "chronic illness", to solve the traffic problems in the city, the fundamental way out is to seek scientific and reasonable traffic management strategy.Traffic flow simulation is a reproduction of the operating rules of traffic flow, transportation system management, control and optimization of test instruments and tools, microscopic traffic simulation for microscopic traffic flow simulation is an important part of the traffic simulation. Microscopic traffic simulation model parameter calibration to adjust the individual parameters of the simulation system, according to the local traffic conditions, the simulation model can accurately express specific simulation object. An important step of the simulation model calibration and test the microscopic simulation technology applications, can be effective in ensuring the reliability of the results of the simulation accuracy and running. Model parameter calibration to ensure the accuracy of the establishment of road geometry model and the corresponding traffic management control measures, but also to ensure the rationality expressed by the simulation model users run features.Based on actual traffic characteristics of mixed traffic, made a thorough study of microscopic simulation model calibration and inspection. First, the simulation model parameter calibration research background and the purpose and significance of the research, analyzing the status quo of research at home and abroad, and focuses on the research of ideas and the main research content. Second, an overview of the basic knowledge and processes of the micro-simulation model, and traffic simulation software VISSIM brief. Subsequently, summed up the microscopic simulation model calibration specific seven steps:1, microscopic traffic simulation model.2, the initial calibration. Default parameter set assessment.4. feasibility testing.5, the parameter range of adjustment.6, using a genetic algorithm parameter calibration.7, the calibration parameter set assessment and inspection. At last, speed calibration based on the GA was implemented and segments of Jinan was selected as the study region.Compression ratio concept and its calibration method based on test were proposed in this paper. Finally, the actual road in Jinan City. Shandong Province, for example, the establishment of a micro-simulation model, the parameter calibration and analysis of the study results to verify the feasibility of the calibration method proposed in this paper.