出行需求驱动的高速公路路网演化模型

Modeling evolution of freeway network driven by travel demands

基于复杂网络理论构建高速公路路网演化模型,提出了一种上层模型为加权出行需求网络及下层模型为高速公路网络的双层复杂交通网络模型.设计了双层复杂交通网络的演化准则:①上、下层网络各自演化,出行网络的连接服从强度准则,高速公路路网按照强度驱动连接准则和投资约束机制演化,这些演化准则能避免优先连接准则和效用最大准则的冲突;②上、下层网络相互影响,出行网络的变化通过边权耦合机制影响高速公路网络的演化,高速公路网络的变化影响出行阻抗从而影响着出行网络.以湖南省高速公路网络的演化过程为例,对该模型进行了仿真.仿真结果表明,分析模型是有效的.

Freeway network＇s evolution is modeled bi-level traffic complex network model is devised, network and the lower is freeway network. Second is suggested：①Attachment law of travel network based on complex network theory. First, a whose upper is the weighted travel demands evolution law of the bi-level traffic network strength-driven while the evolution of free-way network obeys to the rule of strength driven attachment and investment scale. These laws can avoid conflicts of attachment principle and utility principle.②Freeway network is driven by travel network based on the rule of link weight coupling while it has impacts on travel network＇s evolution through travel times. Finally, Hunan freeway network＇s evolution process is simulated based on the bi-level traffic network to illustrate its effectiveness.