Traffic Simulation Software On Signalized Multi-intersection In Urban Street

As intersection is a necessary part in urban street, signal control would not be replaced in coming intelligent traffic control. This paper takes simulation research on signalized multi-intersections of urban street.Firstly, it conceptually abstracts simulation system as three subsystems: (1) urban street topology, this paper considers the topology consisted of input-section, output-section and middle-section., according to flow trait of traffic stream. (2) signalized-intersection control, from combination idea, it cuts control object into to atom level objects that are traffic stream and signal model. (3) Vehicle's behavior, we put forward two-level-driving method which is easy to simulation. On the aspect of choosing best route, it introduce the driveway freedom to revise dynamics average speed in order to value section's weight ,and search and store all possible routes before starting simulation clock.Secondly, it gives four-layer simulation framework based on MVC theory. View layer is the uppermost layer, it mainly accomplishes the needs of dynamically showing traffic environment, setting simulation parameter, starting clock, and so on.; The second layer is control layer (logic layer), it is the core controller of simulation flow, and it deal with most logic-arithmetic calculation in terms of vehicle behavior on urban streets; the third lay called model layer, which is the place of route net model and signaled intersections control model; the lowermost layer is data layer, it support a global access field of shared data and objects to simulation system;Finally, combining simulation framework in paper and object-oriented design models, and firmly keeping to the rules of modularization and structure in software design, it simulates the system under JBuilder 9.0 The simulation puts emphasis on elementary research platform, many works to application is still waiting to extend.