| In recent years, the regional integration process has been accelerated, the construction of new countryside and villages and towns space renovation was intensified, the fast development of urban and rural road network resulted in road network space constantly refactoring and transformation. With sharp dynamic transition and spiral succession, the urban and rural road network system in the composition, structure, function, system evolution and interaction mechanism is complicated. As an important link in the construction of infrastructure, in order to avoid unnecessary wasting of resources, road network design and planning is also in urgent need of scientific theory guidance and scheme selection of current disciplinary. This article deconstructs the urban and rural road network system for two sub-systems (supply system and demand system), introducing synergetics, system-network dynamics and fuzzy mathematics theory, fully reveals the space evolution of the coupling coordination mechanism of supply-demand system of urban-rural road network in Wuhan Metropolitan Area(WMA) for the purpose of providing theoretical guidance and decision-making basis for our country in urban-rural road network optimization.This aticle was divided into eight chapters:Chapter 1 is the introduction, focusing on analysis of the background and significance of this research. First of all, the rise of complexity science research makes complex traffic network research being a hotspot, however, the study on the development and evolution mechanism of the traffic network system is still weak; Secondly, the complexity of the geography system is gradually revealed, but is still in the preliminary stage of development;Finally, with the fast networked development of metropolitan area, urban-rural road network structural problems are increasingly prominent.Therefore, the systenmatic research on space-time growth and evolution mechanism of urban-rural road network system has a strong realistic meaning and profound theoretical significance.Chapter 2 involves the research advances and review in and abroad. Complex traffic network, coupling development between traffic and regional has aroused the attention of many geographers. Its theories matures, achievements become more bundant, but the researches in geographical perspective are relatively few, and are limited to a single dimension or a single research methods.Researches on the self-organization principle and growth mechanism of road network system from the space-time multiscale is relatively poor.Chapter 3 deconstructs urban-rural road network system for two sub-systems (supply system and demand system), and builds the evaluation index system of supply-demand system. From the connotation level, urban-rural road network system can be divided into two sub-systems:supply and demand. The supply system can be decomposed into "pattern" and "scare" and "service" three aspects. "Pattern" refers to the network, "scare" refers to the level of road network scale and "service" refers to the network characteristic of servo technology and capability. The fundamental driving force of the development of the demand of urban and rural road network system is the need of urban and rural economic and social elements association and communication, which is characterized by the interaction of elements between economic and social system (including population).Therefore, this article constructs the evaluation index of demand sytem of urban-rural road network system from two dimensions of economic development and social population.Chapter 4 discusses space-time growth of the supply-demand system of urban-rural road network of WMA from different spatial scales. On circle domain level, the supply system and demand system of urban-rural road network in WMA show varying degrees of growth trend in the past 18 years. On city level, the supply system presents a space growth trend of "core-periphery", the demand system shows a spatial pattern of Wuhan city dominated. On county level, the spatial difference of supply system is small, and the supply system presents a layers’space development pattern. The spatial development of demand sysytem is balanced, which presents a plate cluster pattern. However, the growth of supply and demand system of urban-rural road network in WMA are serious uncoordinated from 1995 to 2012, the supply system development is far more than the demand system.Chapter 5 introduces the coupling coordination degree model to study spatial coordinated development between the supply and demand system of urban-rural road network in WMA from different spatial scales.On circle domain level, the coupling coordination degree between the supply and demand system of urban-rural road network are continuous optimization, and the supply-demand system present a good images of high level of the coordinated developmentcircle.On Region-city level, the supply and demand system coupling from low level to high level, and the spatial difference is small. The coordinated degree between the supply and demand system developed from disorder to high coordination degree, which shows a tendency of synchronous advanced. On county level, the coupling coordination degree of overall level is not high, "core-periphery" pattern is remarkable.Chapter 6 introduces Yangtze River Delta Urban Agglomeration and Chengdu-Chongqing Urban Agglomeration as two comparative objects in order to discuss the spatial development differences of the supply and demand system of urban and rural road network among the three city Circles. China’s urban-rural road network supply system space development presents a "cascade" pattern, and the development level of eastern, central and western city circles reduces in turn. For the demand system, the eastern’s (Yangtze River Delta Urban Agglomeration) development superiority is bigger, while the central is equal with the western. The coupling coordination degree between supply and demand systems of urban-rural road network in Yangtze River Delta Urban Agglomeration system is higher, while the coupling coordination degree in Wuhan Metropolitan Area has high space differences, and the overall level of coupling coordination degree of in Chengdu-Chongqing Urban Agglomeration is low.Chapter 7 uses the linear regression model, the grey relation model and system dynamics model to reveal the co-evolution mechanism and to predict the development trend of supply and demand system of urban-rural road network of WMA. The leading role played by demand system for supply system is directly reflected in the secondary industry dominated economic structure, and gradually improve the linear growth of civilian car ownership bellow the improving living standard, the gradual improvement of the living environment and the increasing population size and so on. The promoting effect for demand system played by supply system on the one hand embodied in network construction, which makes the level of urban and rural road network more and more higher, On the other hand embodied in prevailing cost descending. At last, this chapter designs three coupled development model based on coupling characteristics of supply and demand system of urban-rural road network in order to provide regulatory strategies for road network construction in WMA.Chapter 8 includes the conclusion, the innovation and the follow-up study of this study. It systematically does a summary of the main conclusions and the main innovations in this article, and proposes a follow-up study on the basis of analysis of the full text. |
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