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摘要: 分析了非可加路径费用的交通分配问题, 考虑了排放对传统交通分配模型的影响, 在Venigalla等研究基础上, 给出了在不同发动机启动模式下考虑排放的交通分配模型, 并采用基于路径的梯度投影算法(GP)和非集计的单纯分解算法(DSD)进行模型求解。数值验证结果表明: GP所占的CPU时间大致为DSD的1/25, 所使用的路径为DSD的1/5, 这两种基于路径的算法得出数值最优解的收敛速度比基于Frank-Wolfe(FW)的算法要快, 适用于求解大规模非可加路径费用的交通分配问题。Abstract: The traffic assignment of non-additive path costs was analyzed.Emission effects on traditional traffic assignment model were considered.Based on Venigalla's research, a traffic assignment model considering emissions under different operating modes of engine was put forward.Two path-based algorithms such as gradient projection(GP) algorithm and disaggregated simplicial decomposition(DSD) algorithm were adopted to solve the mathematic model.Analysis result indicates that the CPU time consumed by GP is 1/25 of that consumed by DSD, the paths used by GP are 1/5 of that used by DSD, and both GP and DSD algorithms have rapider convergence speeds than Frank-Wolfe(FW) algorithm, so the path-based algorithms can be widely used in solving large scale traffic assignment problem with non-additive path costs.
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Key words:
- transportation planning /
- emission model /
- path-based algorithm /
- non-additive path cost
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