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Research on the Division Method of Signal Control Sub-Region Based on Macroscopic Fundamental Diagram

Author

Listed:
  • Xianglun Mo

    (Department of Transportation, School of Mines, China University of Mining and Technology, Xuzhou 221116, China)

  • Xiaohong Jin

    (Department of Transportation, School of Mines, China University of Mining and Technology, Xuzhou 221116, China)

  • Jinpeng Tian

    (Department of Transportation, School of Mines, China University of Mining and Technology, Xuzhou 221116, China)

  • Zhushuai Shao

    (Department of Transportation, School of Mines, China University of Mining and Technology, Xuzhou 221116, China)

  • Gangqing Han

    (Department of Transportation, School of Mines, China University of Mining and Technology, Xuzhou 221116, China)

Abstract

The macroscopic fundamental diagram (MFD) provides a method to evaluate macro traffic operation through micro traffic parameters, which can be applied to traffic control to prevent traffic congestion transfer and improve road network efficiency. However, due to the large scale of the urban road network as well as the complex temporal and spatial distribution of road congestion, the application of the MFD for signal control first requires the partition of the urban road network. Based on the analysis of MFD partition purposes, a set of MFD partition methods based on graph theory was designed. Firstly, graph theory was used to transform the urban road network; secondly, the minimum spanning tree method was used to divide the urban traffic network map. Moreover, the attribution of the link between connected regions is determined. Our method can solve the problem of ambiguous intersection ownership, and the road sections belonging to the same road in opposite directions are separated. This method has the ability to control the size of the area by limiting the number of intersections; Finally, the evaluation index of regional clustering results was drawn. To achieve the research objective, we collected and processed vehicle information data from the Xuzhou car-hailing platform to obtain traffic density information. Then, we selected an area with sufficient data and a large enough road network. The empirical value range of the regional control value was obtained by comparing the values of multiple groups of measurement data k and evaluation indexes. In this process, it was found that during the period of flat peak and peak transition, while the regional average traffic density changes, the uniformity of traffic density first decreases and then increases. The traffic density uniformity of the signal control area can be improved by controlling the size of the signal control area. We obtained the empirical value range of the regional control value k by comparing the values of multiple groups of measurement data k and evaluation indexes. Then, we compared them with the two kinds of traditional partition algorithms and improved multiple dichotomy algorithms. Our method improves road network balance by 5% over existing methods.

Suggested Citation

  • Xianglun Mo & Xiaohong Jin & Jinpeng Tian & Zhushuai Shao & Gangqing Han, 2022. "Research on the Division Method of Signal Control Sub-Region Based on Macroscopic Fundamental Diagram," Sustainability, MDPI, vol. 14(13), pages 1-19, July.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:13:p:8173-:d:855682
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    References listed on IDEAS

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