多层次多模式综合交通网络设计研究

Multilevel and Multimodal Comprehensive Transport Network Design

基于多层次多模式研究如何设计可持续的综合交通网络.根据交通网络层次特征定义了层次因子,结合交通负外部性定义了广义路径费用,构建了多层次多模式综合交通网络Logit-随机均衡的非线性规划模型,并构造了多层次多模式交通网络设计算法;通过算例网络的数值试验,着重分析了网络广义费用总量的层次结构弹性与需求弹性,以及模式分离参数对不同层次结构网络的广义费用总量的影响,与模式分离参数取定不同值的情况下平均广义费用的需求弹性;分析表明,在考虑层次性的情况下所设计的综合交通网络能更好地适应需求的增长,且层次结构网络对模式分离参数是不敏感的.

The paper investigates the sustainable network design for multilevel and multimode transport system. The hierarchical factor is defined by transport hierarchy, and the generalized path cost is formulated with traffic negative externalities involved. Nonlinear programming is then established for Log/t-stochastic equilibrium model of multilevel and muhimode comprehensive transport network. An algorithm for multilevel muhimode transport network is proposed accordingly, and the numerical experiments of selected network are conducted. Hierarchy elasticity and demand elasticity of network totai generalized cost are defined and focused on. The study also analyzes the impact of mode split parameter on the total generalized cost of networks with different hierarchical structure and demand elasticity of average generalized cost with different mode split parameter value. Results show that the designed comprehensive transport network with transport hierarchy is well adapted to the growth of traffic demands without network great performance deterioration and that hierarchical transport network is insensitive to the change of mode split parameter value.