| Characterized as large flux, high speed, safety and comfort, freeway develops rapidly and plays more and more important role in road-based transport system, and has made great contribution to improving the existing transportation situation and promoting the development of the national economy. However, the traffic congestion and the problems resulting from it, such as traffic delay, traffic safety, environment pollution and energy consuming, have constrained badly the effect of freeway transportation. According to relevant study and practices, the traffic control and management to freeway is effective way to solving these problems.The traffic control and management system of freeway is a Varying with time, large-scale complex system, which includes people, vehicle and road, and the traditional control method and general management means could not reach the satisfied result. Thus, based on integrated and intelligent notion of traffic control and management, regarding intelligence engineering (including computer science, artificial intelligence, systems engineering) as methodology which solves large-scale complex problems, this paper studies deep on the freeway traffic control and management. The main researches can be summed up as following aspects:1. Analyzing the model of freeway traffic flow , studying the freeway traffic control, demonstrating the limitation of traditional way and tactic in traffic control, putting forward the notion of freeway traffic intelligent control, and studying on the tactic in intelligent control system.2. The integrated traffic control is the highest traffic control form of freeway, based on theories and methods of intelligent agent, systems science and intelligent control, this paper studies on integrated traffic control system of freeway. Firstly, the paper elucidating the basic theory of intelligent agent, analyzing the basic structure of control system, putting forward the distributed hierarchical architecture of the integrated traffic control system of freeway. And based on these, the paper builds the MAS(Multiagent System) model of the integrated traffic controlling system of freeway, and studies agent construction model, agent constructing methods, multiagent communication and cooperative mechanism in MAS model.3. ATMS is an important part and main application field of ITS (Intelligent Transportation System), based on ATMS, the paper studies on the freeway traffic control and management system(FTCMS). Firstly, the paper analysis the ATMS (Advanced Traffic Management System), and points out that ATMS will be the direction of the intelligent development of FTCMS. Then, based on the function demand analysis on FTCMS, the paper brings forward the ATMS-based systems structure of FTCMS, by means of the client/server technology, studies the problem of the huge data integrating in the whole open-system architecture. Finally, AIDS(Auto Incident Detection System) is analysed deep, the notion of integrated intelligent detection algorithm is put forward, and the Wave_net is discussed in this paper.4. Considering that freeway is almost toll-highway in China, the paper studies on the toll management of freeway. Firstly, the paper summarizes the basic theory and technology of the toll system, then, studies toll system under the road-network environment, analyses some important problems existing in toll system under the road-network environment, andpresents the relative measure. Finally, discusses the technology of ETC (Electronic Toll Collection) and combined ETC.5. The highway communication system was the information platform of freeway traffic control and management. Firstly, the paper analyses the characteristics of freeway communication operation, and studies the freeway buildup-network technology (SDH, IP, ATM, and the integrated network technology). Finally, the paper presents the optimization model of communication buildup-network technology for freeway intelligent controlling and management, and two examples are given.Finally, conclusions of all resea... |
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