A modified NaSch model with density-dependent randomization for traffic flow
A modified NaSch model with density-dependent randomization for traffic flow
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DOI：
10.1140/epjb/e2007-00155-x
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发表时间：
2007-06
期刊：
影响因子：
--
通讯作者：
H. Zhu;H. Ge;L. Dong;S. Dai
中科院分区：
文献类型：
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作者：
H. Zhu;H. Ge;L. Dong;S. Dai
在交通流Nagel-Schreckenberg（NaSch）模型的基础上，提出了一种改进的基于密度随机化的元胞自动机（CA）交通流模型（简称DDR模型）.通过仿真得到的基本图显示了这种改进的NaSch模型捕捉交通流的基本特征的能力，例如，同步流动、亚稳态、滞后和较高密度下的相分离。比较了DDR模型与NaSch模型、DDR模型与VDR模型的性能。并分析了其内在机理。结果表明，该模型是合理的，更符合实际情况.
Based on the Nagel-Schreckenberg (NaSch) model of traffic flow, a modified cellular automaton (CA) traffic model with the density-dependent randomization (abbreviated as the DDR model) is proposed to simulate traffic flow. The fundamental diagram obtained by simulation shows the ability of this modified NaSch model to capture the essential features of traffic flow, e.g., synchronized flow, metastable state, hysteresis and phase separation at higher densities. Comparisons are made between this DDR model and the NaSch model, also between this DDR model and the VDR model. And the underlying mechanism is analyzed. All these results indicate that the presented model is reasonable and more realistic.