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为了从道路建设的程度测算城市轨道交通线网的规模,分析了目前国内采用的轨道交通线网规模测算方法,提出了基于溢出交通需求的轨道交通线网规模测算模型。在保证规划年城市道路网能维持一定的服务水平的前提下,测算出城市交通总需求相对于道路供给的溢出量,将溢出交通需求换算成客运量转由轨道交通承担,利用轨道交通线网的负荷强度指标进而可确定轨道交通线网规模,并采用不同的方法对2020年西安市轨道交通线网规模进行了测算。测算结果表明:按出行需求推算的线网规模为103·68km,从财政实力“可能”的角度分析为66·32~94·74km,基于溢出交通需求推算为95·89km,计算结果基本一致,说明提出的测算模型可行。
In order to estimate the scale of urban rail transit network from the degree of road construction, the method of rail transit network scale measurement currently used in China is analyzed, and the scale calculation model of rail transit network based on overflow traffic demand is proposed. On the premise of ensuring that the urban road network in the planning year can maintain a certain service level, the spillover amount of total urban traffic demand relative to road supply is calculated, and the overflow traffic demand is converted into passenger traffic and transferred to rail transit. The rail transit network Load capacity indicators in turn can determine the size of rail transit network, and using different methods to measure the scale of Xi’an Metro network in 2020. The calculation results show that the scale of the network calculated according to the travel demand is 103.68km, from 66.32 to 94.74km from the financial strength / possible position, and 95.89km based on the overflow traffic demand. The calculation results are basically as follows Consistent, indicating that the proposed calculation model is feasible.