考虑超级网络广义重叠的路径选择建模

Route choice modeling with overlapping in super-networks

现代交通网络中普遍存在物理路段和运输方式的重叠现象.将交通网络中的重叠现象定义为广义重叠问题,提出多层次混合logit模型用以研究广义路径的相关性.基于该模型,可将超级网络的交通分配简化为不动点问题.该研究提出解决广义重叠问题的算法,并通过算例对广义重叠问题的出行选择进行说明,通过分析重叠误差项,讨论广义重叠问题对路径选择的影响.结论表明,提出的模型可有效解决广义重叠问题,对于路径选择和交通分配问题具有重要意义.

In modern transportation networks,there is a common phenomenon of overlapping of physical road sections and transport modes.In this study,the overlapping phenomenon in traffic network is defined as the generalized overlapping problem which is related to the failure of many existing models for users route selection.When modeling the route selection behavior in the super-networks,the available routes are constrained by the overlapping of both the physical segments and the transport modes.In this paper,we propose a multi-level mixed logit model to investigate the correlation of generalized routes.Based on the proposed model,the traffic assignment of super network can be simplified as fixed point problem.By analyzing the error terms of the physical segments and the transport modes,we discuss the overlapping effects on the route choice.The results show that the proposed model can sole the overlapping problem effectively,which has significant effects on the route choice and traffic assignment problems in practice.