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Research on Safety and Traffic Efficiency of Mixed Traffic Flows in the Converging Section of a Super-Freeway Ramp

Author

Listed:
  • Quan Yu

    (School of Electrical and Control Engineering, North China University of Technology, Beijing 100144, China)

  • Linlong Lei

    (School of Electrical and Control Engineering, North China University of Technology, Beijing 100144, China)

  • Yuqi Bao

    (School of Electrical and Control Engineering, North China University of Technology, Beijing 100144, China)

  • Li Wang

    (School of Electrical and Control Engineering, North China University of Technology, Beijing 100144, China)

Abstract

On-ramp merging areas are essential parts of freeways. The merging behavior of vehicles is the main factor affecting the continuity of freeway traffic flow, which determines the capacity of the main freeway line. With the development of innovative car technology, ACC technology has been widely used in actual vehicles. At the same time, the public’s demand for freeway-speed improvement is increasing. However, the evaluative research on freeway-speed-improvement schemes, safety, and efficiency, is incomplete. Therefore, this paper aims at the study of the mixed traffic flow of ACC and human-driven vehicles, simultaneously increasing the maximum speed limit to 140 km/h, and establishes a ramp-entry model through the SUMO simulation platform. The traffic-flow parameters upstream of the ramp entry and downstream of the weaving area are analyzed, including the flow, average speed, headway, and lane-change rate. The influence of the driving conditions for mixed ACC vehicles with different proportions in the ramp-merging scenario is analyzed from efficiency and safety perspectives. Studies have shown that mixing ACC vehicles can improve the safety and efficiency of the road, and the increase in the maximum speed limit has limited road capacity. When considering the inclusion of ACC vehicles, increasing the maximum speed limit can improve the operating efficiency of the road.

Suggested Citation

  • Quan Yu & Linlong Lei & Yuqi Bao & Li Wang, 2022. "Research on Safety and Traffic Efficiency of Mixed Traffic Flows in the Converging Section of a Super-Freeway Ramp," Sustainability, MDPI, vol. 14(20), pages 1-15, October.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:20:p:13234-:d:942677
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    References listed on IDEAS

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    2. Yuntao Shi & Ye Li & Qing Cai & Hao Zhang & Dan Wu, 2020. "How Does Heterogeneity Affect Freeway Safety? A Simulation-Based Exploration Considering Sustainable Intelligent Connected Vehicles," Sustainability, MDPI, vol. 12(21), pages 1-18, October.
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    4. Davis, L.C., 2007. "Effect of adaptive cruise control systems on mixed traffic flow near an on-ramp," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 379(1), pages 274-290.
    5. Davis, L.C., 2013. "Optimality and oscillations near the edge of stability in the dynamics of autonomous vehicle platoons," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 392(17), pages 3755-3764.
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