Dynamic Continuum Model with Elastic Demand for a Polycentric Urban City

Dynamic Continuum Model with Elastic Demand for a Polycentric Urban City
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多中心城市弹性需求的动态连续体模型

DOI:
10.1287/trsc.2016.0680
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发表时间:
2017-08
影响因子:
4.6
通讯作者:
Keechoo Choi
Keechoo Choi
中科院分区:
工程技术2区
文献类型:
--
作者:
Yan-Qun Jiang;S.C. Wong;Peng Zhang;Keechoo Choi

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本文提出了一个具有弹性需求的连续交通系统的宏观动态交通分配模型。将反应式动态用户均衡模型扩展到多中心商业区网络均衡问题的模拟。交通流的每个副本基于来自无线电广播服务或路线引导系统的瞬时交通信息,反应性地做出路线选择决策,以最小化从起点到目的地的总旅行成本。流的每个副本的弹性需求函数与其总的瞬时旅行成本相关联。在非结构网格上,守恒律方程采用格心有限体积法求解,Eikonal型方程采用快速扫描法求解。通过对一个包含两个CBD的城市交通网络的数值实验,验证了模型的合理性和数值方法的有效性。数值计算结果表明,该模型具有较好的稳定性。
This paper presents the development of a macroscopic dynamic traffic assignment model for continuum transportation systems with elastic demand. A reactive dynamic user equilibrium model is extended to simulate network equilibrium problems for an urban area with multiple central business districts (CBDs). Each copy of traffic flow reactively makes route choice decisions to minimize the total travel cost from origin to destination, based on instantaneous traffic information from a radio broadcasting service or route guidance system. The elastic demand function for each copy of flow is associated with its total instantaneous travel cost. The model is solved by a cell-centered finite volume method for conservation law equations and a fast sweeping method for Eikonal-type equations on unstructured grids. Numerical experiments for an urban traffic network with two CBDs are presented to verify the rationality of the model and the validity of the numerical method. The numerical results indicate that the model cap...
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