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Fundamental diagram of mixed traffic flow considering time lags, platooning intensity, and the degradation of connected automated vehicles

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  • Li, Ruijie
  • Sun, Siyuan
  • Wu, Yunxia
  • Hao, Huijun
  • Wen, Xuguang
  • Yao, Zhihong

Abstract

To investigate the impact of connected automated vehicles (CAVs) on the characteristics of mixed traffic flow this paper proposed a fundamental diagram to consider time lags, platooning intensity, and the degradation of CAVs. First, the cooperative adaptive cruise control (CACC), adaptive cruise control (ACC), and intelligent driver model (IDM) are used to describe the car-following behavior characteristics of CAVs, and degraded CAVs (DCAVs), and HDVs, respectively. Second, a fundamental diagram model of mixed traffic flow under different penetration rates of CAVs is derived. The model is related to CAVs degradation, time lags, and platooning intensity. Then, a sensitivity analysis is investigated, including platooning intensity, free-flow speed, and minimum safety distance. Finally, the proposed model is verified by a simulation experiment designed by SUMO. The results show that the free-flow speed, penetration rate, and platooning intensity of CAVs positively affect the traffic capacity and optimal traffic density of mixed traffic flow. On the contrary, the time lags and minimum safety distance harm the traffic capacity and optimal traffic density of mixed traffic flow.

Suggested Citation

  • Li, Ruijie & Sun, Siyuan & Wu, Yunxia & Hao, Huijun & Wen, Xuguang & Yao, Zhihong, 2023. "Fundamental diagram of mixed traffic flow considering time lags, platooning intensity, and the degradation of connected automated vehicles," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 627(C).
    • Handle: RePEc:eee:phsmap:v:627:y:2023:i:c:s0378437123006854
    DOI: 10.1016/j.physa.2023.129130
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    References listed on IDEAS

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    1. Jiang, Yangsheng & Sun, Siyuan & Zhu, Fangyi & Wu, Yunxia & Yao, Zhihong, 2023. "A mixed capacity analysis and lane management model considering platoon size and intensity of CAVs," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 615(C).
    2. Ye, Lanhang & Yamamoto, Toshiyuki, 2018. "Modeling connected and autonomous vehicles in heterogeneous traffic flow," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 490(C), pages 269-277.
    3. Yao, Zhihong & Hu, Rong & Wang, Yi & Jiang, Yangsheng & Ran, Bin & Chen, Yanru, 2019. "Stability analysis and the fundamental diagram for mixed connected automated and human-driven vehicles," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 533(C).
    4. Jiang, Yangsheng & Ren, Tingting & Ma, Yuqin & Wu, Yunxia & Yao, Zhihong, 2023. "Traffic safety evaluation of mixed traffic flow considering the maximum platoon size of connected automated vehicles," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 612(C).
    5. Jiang, Yangsheng & Wang, Sichen & Yao, Zhihong & Zhao, Bin & Wang, Yi, 2021. "A cellular automata model for mixed traffic flow considering the driving behavior of connected automated vehicle platoons," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 582(C).
    6. Yao, Zhihong & Gu, Qiufan & Jiang, Yangsheng & Ran, Bin, 2022. "Fundamental diagram and stability of mixed traffic flow considering platoon size and intensity of connected automated vehicles," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 604(C).
    7. Chang, Xin & Li, Haijian & Rong, Jian & Zhao, Xiaohua & Li, An’ran, 2020. "Analysis on traffic stability and capacity for mixed traffic flow with platoons of intelligent connected vehicles," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 557(C).
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    Cited by:

    1. Ren, Wenhao & Zhao, Xiaohua & Li, Haijian & Fu, Qiang, 2024. "Traffic flow impact of mixed heterogeneous platoons on highways: an approach combining driving simulation and microscopic traffic simulation," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 643(C).
    2. Pei, Yulong & Pan, Sheng & Wen, Yuhang, 2024. "Analysis of roadway capacity for heterogeneous traffic flows considering the degree of trust of drivers of HVs in CAVs," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 639(C).
    3. Zheng, Shuai & Liu, Yugang & Fu, Kui & Li, Rongrong & Zhang, You & Yang, Hongtai, 2024. "Optimization of isolated intersection signal timing and trajectory planning under mixed traffic environment: The flexible catalysis of connected and automated vehicles," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 640(C).

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