[1]李宗平,李林恒.快速路合流区加速车道长度计算方法[J].东南大学学报(自然科学版),2016,46(4):888-892.[doi:10.3969/j.issn.1001-0505.2016.04.036]
 Li Zongping,Li Linheng.Computational method of acceleration lane length in expressway merging area[J].Journal of Southeast University (Natural Science Edition),2016,46(4):888-892.[doi:10.3969/j.issn.1001-0505.2016.04.036]
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快速路合流区加速车道长度计算方法()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
46
期数:
2016年第4期
页码:
888-892
栏目:
交通运输工程
出版日期:
2016-07-20

文章信息/Info

Title:
Computational method of acceleration lane length in expressway merging area
作者:
李宗平李林恒
西南交通大学交通运输与物流学院, 成都610031
Author(s):
Li Zongping Li Linheng
School of Transportation and Logistics, Southwest Jiaotong University, Chengdu 610031, China
关键词:
快速路 合流区 加速车道 交通流breakdown 交通设计
Keywords:
expressway merging area acceleration lane traffic flow breakdown traffic design
分类号:
U491.1
DOI:
10.3969/j.issn.1001-0505.2016.04.036
摘要:
为了克服现有合流区加速车道长度计算方法的缺点和合理设计快速路合流区,提出了一种新的合流区加速车道长度的计算方法.首先通过分析合流区交通流breakdown现象与加速车道长度的关系,建立了基于车辆占有率的合流区交通流breakdown事件发生概率模型.然后,利用合流区交通流breakdown事件发生的概率,建立了合流区加速车道长度的计算模型.最终实现了根据合流区主路与匝道交通量计算合流区加速车道长度的新方法.该方法不需要假设合流区主路外侧车道交通流车头时距的概率分布,克服了现有方法的不足.以北京市大羊坊的合流区为例,利用该方法绘制了不同主线交通量情况下合流区发生breakdown事件概率随加速车道长度变化的曲线,为合理设计合流区提供了依据.
Abstract:
In order to overcome the shortcomings of the existing methods for calculating the length of acceleration lane in the merging area and reasonably design the merging area of the expressway, a new method for calculating the length of acceleration lane in the merging area is studied. First, by analyzing the relationship between the breakdown phenomenon and the acceleration lane length, a probability model of traffic flow breakdown event in the merging area based on the vehicle occupancy rate is established. Then, the model for calculating the length of the acceleration lane in the merging area is established by the breakdown probability. Finally, the new method for calculating the length of the acceleration lane in the merging area based on the main road and ramp traffic volumes is proposed. The method does not need to assume that the headway probability distribution of the traffic flow in the outer lane of the main road in the merging area, which can overcome the shortcomings of the existing calculation methods. Taking the merging area of Dayangfang in Beijing City as an example, the curves of the breakdown event probability with the acceleration lane length at different mainline traffic volumes are plotted by the method. The study provides a basis for the reasonable design of the merging area.

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备注/Memo

备注/Memo:
收稿日期: 2015-10-16.
作者简介: 李宗平(1963—),男,博士,教授,博士生导师,zpli@swjtu.cn.
基金项目: 国家自然科学基金资助项目(51578465).
引用本文: 李宗平,李林恒.快速路合流区加速车道长度计算方法[J].东南大学学报(自然科学版),2016,46(4):888-892. DOI:10.3969/j.issn.1001-0505.2016.04.036.
更新日期/Last Update: 2016-07-20