Modeling And Simulation Of Traffic Control Systems In Small And Medium-sized Cities Based On TransModeler

Small and medium-sized cities occupy an important position in China. Weak road network and the mixed traffic flow make its traffic characteristics different from foreign cities and big cities at home. With the development of China’s economy, traffic congestion problems in small and medium-sized cities are growing more and more serious. Studying suitable traffic control strategy and microscopic traffic simulation model have important and far-reaching significance for China’s society, economy and environment.Based on the literature review and field research, the characteristics of dynamic and static transport facilities as well as all transport objects in small and medium-sized cities were analyzed and summarized. Road network description module, traffic demand module and vehicle driving module were established based on TransModeler; after analyzing common traffic control strategy and its adaptability, traffic control program module was built; finally after comprehensive consideration of environmental, economic and traffic effects, traffic evaluation system of small and medium-sized cities was proposed. The main work of this paper was as follows:(Ⅰ) The composition, characteristics and causes of dynamic and static transport facilities, pedestrian flow, non-motor vehicle flow, vehicle flow in small and medium-sized cities were systematic analyzed and summarized. It provided a theoretical basis for establishing microscopic traffic simulation model.(Ⅱ) Based on the role of traffic environment, traffic characteristics, economic conditions and other factors in small and medium-sized cities of the road, the applicability of common traffic improvement techniques such as transportation system management, transportation demand management, pre-timing control of single intersection, coordinated control and adaptive control was analyzed, and proper traffic control strategies were generated.(Ⅲ) After considering and selecting economic, environmental, transportation evaluation indices, proper traffic evaluation system was built for small and medium-sized cities. Then the content and formula of individual focus index were explained.(IV) On the basis of theoretical analysis, microscopic traffic simulation model that has characteristics of small and medium-sized cities was built by using TransModeler software. Based on the real survey data, coordinated control system of some city for tide traffic was designed, and simulation test verified the effectiveness and superiority of this microscopic traffic simulation model.