Study Of Freeway Traffic Simulation And Its Application

To operate the expressway safely and efficiently depends on rational design, programming and management. The traditional methods such as experience field measurement and theoretical analysis can deal with some issue, but because of the complex traffic condition of the expressway systems, the scope they can manage is highly limited. The traffic simulation is able to study the complex expressway traffic situation intuitively and efficiently. It has many advantages such as saving costs, safe, rapid, able control, repeated and so on.The main content of this paper is the simulation of traffic in expressway systems. The paper analyzes the characters of vehicles moving on the different part of expressway systems such as basic segment, ramp and tolling plaza. Combined with the simulation research achievements abroad and domestic, the correlative simulation models such as vehicle creation, tracking, changing lanes, tolling plaza and so on, are analyzed, compared and commented. Based on that, the expressway simulation systems are designed and developed. The main frame of simulation systems is composed by input module, simulation module, output module. The traffic models that adopted in the former three modules are described and improved. The expressway traffic simulation program is complied by VC++ programming language. Do some exprements on the expressway merging-area by the program and the exprements data are used to drawing points-figure. Discussing how the converging vehicles in the ramp affect the vehicles in the basic segment.