Study On Freeway Traffic Management System

Freeway traffic management system is modern management and control one which can relax traffic congest, improve road utilization, increase traffic flow, decrease traffic accident rate and economic loss, protect environment. It selects highway code as principle, operational research, and cybernetics as kernel theories in order to create well-ordered, speedy, safety-comfort travelling environment and realize traffic flow rational leading, limiting and optimizing. Synthetically considering these characteristics, the method of freeway management and control are presented according to four aspects: system objective orientation and concept design, system demand and requirement analysis, system data management and network structure, traffic control and accident detecting theory as well as its application. Function and structure of system are delimitated from the point view of integration. Construction and function demand of subsystem are analyzed and basic implement projects are presented. In this thesis, system data flow and management method and target which based on system network topology structure and equipment demand are described. Traffic modeling ideology and the process of making dynamic model as well as accident detecting program are presented with centralized and distributed traffic control theory in detail, then freeway ramp control theory which based on predictive model and its theoretic pattern are explored. Finally, based on the object oriented programming, program of accident detecting and checking on freeway is developed by using visual C++ as tool.