| 机动车混合交通占有率-流量模型研究 |
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| 引用本文： | 张博,邹智军,白双俐. 机动车混合交通占有率-流量模型研究[J]. 交通标准化, 2014, 0(19): 24-27 |
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| 作者姓名： | 张博 邹智军 白双俐 |
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| 作者单位： | 1. 同济大学交通运输工程学院,上海,201804
2. 重庆工商大学商务策划学院,重庆,400067 |
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| 摘 要： | 在交通流基本参数模型中，密度参数难以直接获取，占有率-流量模型具有较强的实用价值。提出占有率分析单元概念，分析混合交通不同跟车组合下，大型车辆混入对分析单元中占有率参数的影响机理，综合分析单元出现概率，得出在占有率-流量模型中，原始占有率难以反映出大型车辆对交通流影响效应的结论，随后基于车头时距和大车率修正原始占有率，最终建立了机动车混合交通情况下的占有率-流量模型，并用北京快速路实测数据对模型进行了检验，证明占有率修正之后，占有率-流量模型更加精确。此模型等式两边都考虑了大型车辆的影响效应，具有更好的实际物理意义。
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| 关 键 词： | 交通工程 占有率-流量模型 跟车模型 混合交通 大型车辆 |
Occupancy-Flow Model for Mixed Traffic Flow |
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| ZHANG Bo,ZOU Zhi-jun,BAI Shuang-li. Occupancy-Flow Model for Mixed Traffic Flow[J]. Communications Standardization, 2014, 0(19): 24-27 |
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| Authors: | ZHANG Bo ZOU Zhi-jun BAI Shuang-li |
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| Affiliation: | ZHANG Bo, ZOU Zhi-jun, BAI Shuang-li (1. School of Transportation Engineering, Tongji University, Shanghai 201804, China; 2. School of Business Planning, Chongqing Technology and Business University, Chongqing 400067, China) |
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| Abstract: | It is difficult to gain density parameter which can be used in traffic flow model, thus occupan-cy-flow model is more practical. The article proposed the conception of analytical unit of occupancy, ana-lyzed the influence mechanism of large vehicle based on different car-following combination considering the probability of analytical unit of occupancy, concluded that original occupancy could not reflect the im-pact of large vehicle on traffic flow and occupancy-flow model. Then the article modified occupancy based on vehicle headway and mixed rate of large vehicle, established occupancy-flow model in mixed traffic flow situation. Data collected from Beijing expressway showed the model in the article was effective and more meaningful. |
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| Keywords: | traffic engineering occupancy-flow model car-following model mixed traffic flow large ve-hicle |
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