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With the expansion of highway and road network system of continuous improvement, the operation status of the highway, there were many problems to be solved. Highway traffic analysis and evaluation of operating conditions have begun to attract highway managers and road users attention. Highway safety and efficient operation depends on the rational design, planning and management, traditional empirical measurement method and theoretical analysis method can solve some problems, but due to road and traffic conditions highway system complexity, these methods have their huge limitations. Traffic simulation overcomes the limitations of traditional methods, for the highway study provides a new convenient and efficient means of research. Traffic simulation can intuitively and efficiently research freeway traffic state, with cost-saving, safe, fast, study a wide range, can be controlled, repeatable and so on. This paper focuses on highway microscopic traffic flow simulation technology has been studied, the main research contents are as follows: (1) analysis of the various sections of the highway (basic sections, ramps, toll stations) traffic flow in the driver's traffic characteristics, the number of traffic characteristics , road traffic characteristics and traffic running several basic state (free driving, car-driving, lane changing behavior) characteristics and traffic operation factors. (2) use of foreign MultiGen modeling software to establish a three-dimensional simulation visual model of highway; based on microscopic freeway traffic flow simulation, established the microscopic traffic flow simulation model, such as: the grid model, following model, changing lanes models, queuing models, ramp junction with the shunt model. (3) on the basis of the model design and development of dynamic freeway traffic flow simulation system, using VC programming tools and MultiGen software simulation system was realized by the input module simulation system, the simulation module, output module three parts. (4) combined highway data has been measured data for statistical analysis and simulation results comparing simulation results and analysis of simulation results show that reasonable and effective, the study of highway tolls, and to address traffic congestion, traffic incident detection and other issues important practical significance. Through the research work described in this article, basically completed the implementation of the model of traffic flow and highway road network microscopic traffic flow simulation, found the use of VC and MultiGen on microscopic traffic flow simulation method, and from the program is implemented on the micro- three-dimensional simulation of traffic flow work for the future to continue to study traffic flow simulation has laid a good foundation.
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