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路网的运行受到诸多因素的影响而使得路网运输性能发生退化,分析了路网运输性能退化的影响因素和作用机理,给出了路网运输性能退化及退化的极端情况路段失效的成本分析过程框架。基于BPR路阻函数和用户均衡分配理论分析路网运输性能退化的成本函数,建立了拥堵情况下城市路网路段失效的成本评估模型。最后,通过实例分析了路网运输性能退化对出行成本影响的变化规律,给出了路网运输性能退化的极端情况路段失效成本评估的具体过程,研究表明路网运输性能退化对出行成本具有很大的影响,二者成显著的正相关关系。
The operation of road network is affected by many factors and causes the degradation of road network transportation performance. The influencing factors and mechanism of the degradation of road network transportation performance are analyzed. The cost analysis of road section failure due to the degradation and degradation of road network performance is given Process Framework. Based on BPR road resistance function and user equilibrium assignment theory, the cost function of road network transportation performance degradation is analyzed, and a cost assessment model of failure of urban road network segment under congestion condition is established. Finally, an example is given to analyze the change rule of the impact of road network transportation performance degradation on the travel cost. The concrete procedure of evaluating the failure cost of the road network in the extreme condition of the degradation of road network performance is given. The results show that the degradation of road network transport performance has a great impact on the travel cost Big influence, the two have a significant positive correlation.