多种Logit路径选择模型对多层次交通网络的性能影响

发布时间：2018-01-05 21:02

本文关键词：多种Logit路径选择模型对多层次交通网络的性能影响　出处：《公路交通科技》2014年07期 　论文类型：期刊论文

【摘要】：研究了多种Logit路径选择模型应用于多层次交通网络时对网络性能的影响。依据网络层次特征定义了广义路径费用;选取4种典型的Logit模型——单层的多项式Logit(MNL),C-Logit(CL),Path-Size Logit(PSL)以及双层的交叉巢式Logit(CNL)模型,对它们分别构建了适用于多层次网络的等价数学规划模型(MP);对不同层次结构和分散参数取值,利用VC++编程求解4个等价数学规划模型,并计算了系统最优的流量分配。分析表明:3种OD需求下的所有Logit模型所得网络总行程时间费用(NTTC)都高于通过系统最优分配得到的NTTC;利用考虑重叠的CL、PSL、CNL模型所得NTTC皆大于不考虑重叠的MNL模型,且构造越复杂的Logit模型所得NTTC越高;对各个Logit模型而言,层次性交通网络的NTTC要小于没有层次性的情况且层次越高时NTTC越小。
[Abstract]:The influence of various Logit path selection models on the performance of multi-level traffic networks is studied. The generalized path cost is defined according to the hierarchical characteristics of the network. Four typical Logit models, single layer polynomial Logitron (MNL), are selected. Path-Size Logitine (PSL) and the double-layer crossed nested Logitine (CNL) model. For them, an equivalent mathematical programming model for multi-level networks is constructed respectively. Four equivalent mathematical programming models are solved by VC programming for different hierarchies and decentralized parameters. The optimal flow allocation of the system is also calculated. The analysis shows that the total travel time cost of all Logit models with three OD requirements is NTTC). All of them are higher than the NTTCs obtained by the optimal allocation of the system. The NTTC obtained by using the MNL model with overlapping is larger than that of the MNL model without overlap, and the higher the NTTC is, the more complex the Logit model is. For each Logit model, the NTTC of hierarchical traffic network is smaller than that of non-hierarchical traffic network, and the higher the level is, the smaller the NTTC is.
【作者单位】：同济大学交通运输工程学院;华东交通大学轨道交通学院;
【基金】：国家自然科学基金项目(71071165);国家自然科学基金重点项目(51238008) 江西省科技支撑计划项目(20133BBG70104)
【分类号】：U491;O221
【正文快照】： 0引言交通网络规划与设计的工程实践中,网络性能的一个重要测度是网络总行程时间,该指标值越低意味着网络系统的整体性能更好,交通系统带来的社会福利更大。在研究各种网络行为所引发的效率损失[1]时,通常刻画用户均衡(UE)和系统最优(SO)的混合行为导致总行程时间相对SO增大了

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