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A Path-Based Solution Algorithm for Dynamic Traffic Assignment

机译：动态交通分配的基于路径的求解算法

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摘要

The approximation of the traversal cost is a critical component of dynamic traffic assignment model. In link based traffic assignment, it assumes that the constraints sets are linear or convex and it is not realistic in general traffic networks. Comparing with the link based model, the path cost in the objective function of the path based traffic assignment model is implicitly nonlinear or non-convex, which is difficult to solve. In this paper, a path based traffic assignment model combining the generalized expansion method in M/G/c/c model with the point queue model is proposed to extend the link traversal cost to the travel cost along the path. Comparing with the link based model without considering intersection effects, this proposed path based model can take into account queuing delays between intersections and it is easy to implement. In order to validate the proposed path based model, a comparative experiment is implemented by comparing with the traditional travel cost models in Sydney traffic networks. Taking into account travel flow changes and blocking time, the proposed path based model is more effective for travellers from the uncongested traffic to congested traffic networks. In addition, the results from traffic assignment model show that the proposed model can achieve feasible results.
机译：穿越成本的近似值是动态交通分配模型的关键组成部分。在基于链接的交通分配中，它假定约束集是线性的或凸的，并且在一般交通网络中是不现实的。与基于链接的模型相比，基于路径的交通分配模型的目标函数中的路径成本具有隐式非线性或非凸性，这很难解决。本文提出了一种基于路径的交通分配模型，该模型将M / G / c / c模型中的广义扩展方法与点队列模型相结合，以将链接穿越成本扩展为沿途旅行成本。与不考虑交叉路口影响的基于链接的模型相比，该基于路径的模型可以考虑交叉路口之间的排队延迟，并且易于实现。为了验证所提出的基于路径的模型，通过与悉尼交通网络中的传统旅行成本模型进行比较，进行了比较实验。考虑到旅行流程的变化和阻塞时间，所提出的基于路径的模型对于从未拥挤的交通到拥挤的交通网络的旅行者来说更加有效。此外，交通分配模型的结果表明，该模型可以实现可行的结果。

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