Urban Road Traffic Microcirculation Network Traffic Organization Optimization Method Research

In this thesis, the theory for reconstructing urban traffic micro-circulation system is discussed, whose aim is to provide a feasible and effective solution for alleviating traffic congestion of arterial roads. The road resources between arterials that are left unused are explored to shunt the traffic of arterial network, not only alleviating traffic pressure but also saving land and investment. As a solution of traffic congestion, traffic micro-circulation has been practiced in our country, but the systematic theory and method especially for designing traffic micro-circulation system have not been established yet. So aiming at the reconstruction problem of urban traffic micro-circulation, from multi-aspect of system function, network design, traffic organization, the key theoretical problems and optimization methods in the reconstruction of urban traffic microcirculation are discussed in this thesis, the theoretical and methodological guidance for the reconstruction of traffic micro-circulation are provided.In this thesis, comparing with blood micro-circulation, the principle of urban traffic micro-circulation is analyzed, the meaning of traffic micro-circulation for solving traffic congestion is explained, and the function characteristics of traffic micro-circulation is analyzed and concluded. Through the analysis of the present social economic level, land development intensity, network structure, commercial layout, streets cross-sectional layout, parking distribution, and parking and traffic demand factors in urban central district, the organization optimization methods which operation efficiency biggest and traffic condition best in the microcirculation network. In order to maximize traffic efficiency of micro-circulation network and improve traffic conditions, the one-way traffic organization method of micro-circulation network is researched. From the target of lowing the saturation of arterial roads and micro-circulation roads, considering the restriction of the maximum saturation, the bi-level programming model for optimizing one-way traffic organization is set up. With this model the one-way traffic organization scheme of micro-circulation network can be obtained, including the determination of whether each micro-circulation road is set as one way and its direction. Classify branch of rebuilding in the modification of shanty towns, research the urban traffic micro-circulation network design method. From the target of lowing the time of traffic through the Shanty towns area plot, considering the restriction of the maximum saturation, the bi-level programming model for optimizing traffic organization is set up. With this model the traffic organization scheme of micro-circulation network, also main road and branch intersection crossroads control mode of optimal solution can be obtained, makes every road traffic capacity meet the path of traffic flow distribution. Finally, the main theoretical models and algorithms in the thesis are verified through a case, the principle of traffic micro-circulation solving traffic congestion is showed, and the whole thought and process of designing traffic micro-circulation is demonstrated.In this thesis, the principle methods, network design microcirculation method is introduced, combined with the existing road traffic standards, the thesis puts forward a set of traffic organization and the branch network reconstruction design method which is suitable for urban center business district, accordingly, enriched microcirculation planning theory, have the important reference function.