Designing and Developing the Model of Improving Access Networks in Medium-sized Cities Using the Simulation Method (Case Study: City of Sanandaj)

Using the computer simulation is one of the most important current tools for traffic engineering analysis. Simulation means to conduct the desired tests, test the results and compare them with the real system, and in case of positive results, apply it in reality; of course doing all these without requiring to the construction of the real system, without disturbing the real system, without concerning about the destruction of the real system, and in fact, without any losses to the real system. This research is conducted by using library studies – taking notes – and analyzing them as well as simulating and designing the desired construction. The aim of this study is to improve the access networks in the medium-sized cities and the case study is the city of Sanandaj, the center of Kurdistan province. The traffic volume of Azadi square, the main square located in the central core of the city along with the squares, intersections around the area have been studied, and the current conditions and three proposed scenarios have been simulated by means of Aimsun software. In comparing the networks (the proposed scenarios and the current condition), we can conclude that in some intersections, the traffic load of that point cannot be reduced by changing the timing of traffic lights; Maybe by constructing the interchange, the speed of vehicles will not increase significantly, but it can create a smooth traffic and bring comfort and peace for the respected drivers and citizens, these are the main aim of this study.