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Lane Change Trajectory Planning for Intelligent Electric Vehicles in Dynamic Traffic Environments: Aiming at Optimal Energy Consumption

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  • Lin Hu

    (College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, China
    Hunan Province Key Laboratory of Safety Design and Reliability Technology for Engineering Vehicle, Changsha University of Science and Technology, Changsha 410114, China)

  • Jie Wang

    (Hunan Province Key Laboratory of Safety Design and Reliability Technology for Engineering Vehicle, Changsha University of Science and Technology, Changsha 410114, China)

  • Jing Huang

    (College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, China)

  • Pak Kin Wong

    (Department of Electromechanical Engineering, University of Macau, Taipa 999078, Macau)

  • Jing Zhao

    (Department of Electromechanical Engineering, University of Macau, Taipa 999078, Macau)

Abstract

With the reduction in battery costs and the widespread application of artificial intelligence, the adoption of new-energy vehicles is accelerating. Integrating energy consumption optimization into the process of intelligent development is of great significance for sustainable development. This paper, considering the regenerative braking characteristics of electric vehicles and the time-varying nature of surrounding obstacle vehicles during lane changes, proposes a segmented real-time trajectory-planning method combining optimal control and quintic polynomials. At the beginning of the lane change, a safe intermediate position is calculated based on the speed and position information of the ego vehicle and the leading obstacle vehicle in the current lane. The trajectory optimization problem from the starting point to the intermediate position is formulated as an optimal control problem, resulting in the first segment of the trajectory. Upon reaching the intermediate position, the endpoint range is determined based on the speed and position information of the leading and trailing obstacle vehicles in the target lane. Multiple trajectories are then generated using quintic polynomials, and the optimal trajectory is selected as the second segment of the lane-changing trajectory. Experimental results from a driving simulator show that the proposed method can reduce energy consumption by approximately 40%.

Suggested Citation

  • Lin Hu & Jie Wang & Jing Huang & Pak Kin Wong & Jing Zhao, 2025. "Lane Change Trajectory Planning for Intelligent Electric Vehicles in Dynamic Traffic Environments: Aiming at Optimal Energy Consumption," Sustainability, MDPI, vol. 17(9), pages 1-28, May.
    • Handle: RePEc:gam:jsusta:v:17:y:2025:i:9:p:4235-:d:1650914
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    References listed on IDEAS

    as
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