城市次干路集散功能可靠度量化评价与实证研究

发布时间：2019-06-12 06:32

【摘要】：依据《城市道路工程设计规范》(CJJ37—2012)关于次干路功能的阐述,以"支路车流经过次干路汇集向主干路"和"主干路车流经过次干路分散到支路"为研究对象,提出城市次干路集散功能可靠度的概念,作为定量评价次干路功能实现程度的概率测度指标,进而建立相应的数学模型.基于郑州市区2条次干路,采用实地调查的延误、信号配时和交通量数据资料,论证了非饱和情况下,车流由主干路向次干路和由次干路向支路分散,或由支路向次干路和由次干路向主路汇集的相邻交叉口左转延误的不相关性;结合模型分别计算得到各自的集功能可靠度值、散功能可靠度值,与实际交通运行状态进行对比分析,验证了所提方法的可行性与适用性.
[Abstract]:According to the description of the function of the secondary trunk road in the Code for Design of Urban Road Engineering (CJJ37-2012), taking "the traffic flow of the branch road through the sub-trunk road to the main trunk road" and "the traffic flow of the main road passing through the sub-trunk road to the branch road" as the research objects, the concept of the reliability of the distributed function of the urban sub-trunk road is put forward, which is used as the probability measure index to quantitatively evaluate the realization degree of the sub-trunk road function, and then the corresponding mathematical model is established. Based on the data of delay, signal timing and traffic volume of two sub-trunk roads in Zhengzhou city, this paper demonstrates that there is no correlation between the left turn delay of traffic flow from the main road to the sub-trunk road and from the sub-trunk road to the branch road, or from the branch road to the secondary main road and the adjacent intersection from the sub-trunk road to the main road under the condition of non-saturation. Combined with the model, the reliability values of set function and scattered function are calculated respectively, which are compared with the actual traffic operation state, and the feasibility and applicability of the proposed method are verified.
【作者单位】：郑州大学土木工程学院;
【基金】：国家自然科学基金(51278468,51408552)~~
【分类号】：U491

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