| Traffic development is along with city formation and development of health, city road network is a skeleton of the city, is an important factor in the development of city, city road network layout structure and traffic demand in the spatial distribution of the degree of conformance to the actual network evaluation cause tremendous effect. Therefore, how to choose and the improvement of city road network layout structure is a major problem. Some city do not pay attention to the construction of city road branch, gradation, the rationality of city road network density lack enough understanding, road network layout structure can’t adapt to the city traffic demand, network planning stage to establish the old evaluation index system can not adapt to the need of city development at present stage, leading to various traffic problems.This paper starts from China road grade and functional, the macro analysis of city road network layout structure; microscopic analysis of city road network density and intersection density analysis of city road network layout structure, influence factors of city road network layout, evaluation criteria, on a road network layout structure, how to determine the road networks to carry on the discussion, proposed a new road level with the rational evaluation method for city road network, summarizes the gradation of the safeguard measures and coordination mechanism, and further to the city road network reasonable gradation of road network layout research. Finally, taking Zhaoyuan city as an example, analysis of the city road network graded status, evaluation of Zhaoyuan city road network layout, on some sections of the road network layout solution. |
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