Currently many metropolises are confronted with the traffic issues of urban road network and it have been a major social problem for every country which severely restricts the expansion of the city's development and people's normal work and life. The rapid expansion of the cities and the changes of people's habits has also spawned the generation of numerous large buildings, while people living in convenient the transportation network gave brought a amount of pressure . If the transportation information can be conveyed to the traffic management and people who plan to go out reliably and timely, the road network can be fully used and the transport facilities also can used efficiently, at the same time, people who drives car on the road can be guidance so that the travel can also be convenient ; while traffic impact analysis must be based on reasonable road network analysis and evaluation . This thesis builds a platform to achieve the application in traffic impact analysis based on urban road network evaluation and analysis of the level of service, and presents a traffic network evaluation method which combines the road intersections and road network analysis. In this thesis, several parts of the following work has been completed . (1)Complete the establishment of urban road traffic state evaluation system . On the basis of a full analysis of the state of the urban road network traffic, establish a the evaluation of the state of the urban road network evaluation system based on the intersection and the basis road, and the selection of the evaluation indicators is based on the reasonable evaluation and comprehensive science-based prerequisite in order to ensure the applicability of the road traffic state evaluation system. (2) Analysis and study the operation state and the way of evaluation of plane signal intersection In-depth, based on the research of the signal intersection operation characteristics analysis, and select the average delay, saturation and queue length as the evaluation index and the fuzzy theory on the intersection of traffic running state evaluation. (3) Through analyzing the operation of the road, in combination with the evaluation results of intersection, to complete the analysis of the evaluation of road network, present a kind of function imported intersection saturation, average queue length ratio and road travel speed ...
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