[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()

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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

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.

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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.

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