[1] Shi Xinyi, Lin Hangfei,. Study of macroscopic fundamental diagramon Shanghai urban expressway network in China [J]. Journal of Southeast University (English Edition), 2016, 32 (1): 106-111. [doi:10.3969/j.issn.1003-7985.2016.01.018]
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Study of macroscopic fundamental diagramon Shanghai urban expressway network in China(
)
上海快速路网宏观交通流基本图研究
)Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]
- Volumn:
- 32
- Issue:
- 2016 1
- Page:
- 106-111
- Research Field:
- Traffic and Transportation Engineering
- Publishing date:
- 2016-03-20
Info
- Title:
- Study of macroscopic fundamental diagramon Shanghai urban expressway network in China
- 上海快速路网宏观交通流基本图研究
- Author(s):
- Shi Xinyi, Lin Hangfei
- Key Laboratory of Road and Traffic Engineering of Ministry of Education, Tongji University, Shanghai 201804, China
- Keywords:
- macroscopic fundamental diagram(MFD); hysteresis phenomena; urban expressway network; index of congestion
- PACS:
- U491.12
- DOI:
- 10.3969/j.issn.1003-7985.2016.01.018
- Abstract:
- The macroscopic fundamental diagram(MFD)is studied to obtain the aggregate behavior of traffic in cities. This paper investigates the existence and the characteristics of different types of daily MFD for the Shanghai urban expressway network. The existence of MFD in the Shanghai urban expressway network is proved based on two weeks’ data. Moreover, the hysteresis phenomena is present in most days and the network exhibits different hysteresis loops under different traffic situations. The relationship between the hysteresis phenomena and the inhomogeneity of traffic distribution is verified. The MFDs in the years of 2009 and 2012 are compared. The hysteresis loop still exists in 2012, which further verifies the existence of the hysteresis phenomenon. The direct relationship between the length of the hysteresis loop(ΔO)and the congestion is proved based on sufficient data. The width of the hysteresis loop, i.e., the drop in network flow(ΔQ)has no relationship with the congestion, and it varies from day to day under different traffic situations.
- 为了得到城市整体交通状况, 研究了宏观交通流基本图.试图探索上海快速路网的宏观交通流基本图(MFD)的存在性和不同天的MFD图像特征.通过分析上海快速路网2周的数据, 宏观交通流基本图确实存在.并且大部分天的MFD图像存在磁滞现象, 在不同的交通状况下呈现不同的磁滞圈.验证了磁滞现象和交通状况的不均匀程度的关系.比较了2009年和2012年间MFD的变化, 2012年MFD磁滞现象依然存在.最后, 验证了磁滞圈的长度和交通拥堵的相关性, 而磁滞圈的宽度即流量下降的程度与拥堵状况没有关系, 它会随着不同天不同的交通状况产生变化.
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Memo
- Memo:
-
Biographies: Shi Xinyi(1989—), female, graduate; Lin Hangfei(corresponding author), male, doctor, professor, linhangfei@126.com.
Foundation item: The National Natural Science Foundation of China(No.51238008).
Citation: Shi Xinyi, Lin Hangfei. Study of macroscopic fundamental diagram on Shanghai urban expressway network in China[J].Journal of Southeast University(English Edition), 2016, 32(1):106-111. DOI:10.3969/j.issn.1003-7985.2016.01.018.