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中文摘要：
通过对现有换道模型进行改进,提出了一种考虑换道实施过程的模型,并对模型中的关键参数进行了标定.由于该模型考虑了换道实施过程中车辆换道对交通流的影响,新模型的模拟结果与实测值更为符合.运用新模型对不同车道数的道路交通流进行模拟,发现不同车道数的平均每车道通行能力及其交通流特性存在显著差异.
英文摘要：
An improved lane-changing model based on the Nagatani＇s method is proposed. The threshold of the safety headway in lane-changing process is calibrated. Both the lane-changing process and the impact of the lane-changing vehicle on the adjacent vehicles are incorporated into the proposed model. Therefore, simulated results using the proposed model agree with the surveyed results. The marginal decrease of lane capacity with the number of lanes is analysed and validated upon the proposed lane-changing model. We find that the vehicle velocity decreases and the lane changing probability increases with the increasing number of lanes under the congested condition of highways in cities.
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