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Mitigating Traffic Oscillations in Mixed Traffic Flow with Scalable Deep Koopman Predictive Control

Created by
  • Haebom

Author

Hao Lyu, Yanyong Guo, Pan Liu, Nan Zheng, Ting Wang, Quansheng Yue

Outline

This paper presents a method to mitigate traffic fluctuations in mixed traffic flows of autonomous vehicles (CAVs) and human-driven vehicles (HDVs). To address the computational feasibility issues of existing predictive control frameworks and the challenges of modeling the nonlinear and heterogeneous behavior of HDVs, we propose an adaptive deep Koopman predictive control framework (AdapKoopPC). AdapKoopPC features a novel deep Koopman network (AdapKoopnet) that adaptively learns from naturalistic data to represent the complex HDV vehicle-following dynamics as a linear system in a high-dimensional space. This learned linear representation is integrated into a model predictive control (MPC) technique, enabling real-time, scalable, and optimal CAV control. Validated through a HighD dataset and extensive numerical simulations, AdapKoopnet achieves superior trajectory prediction accuracy compared to baseline models, while the AdapKoopPC controller performs robustly even at low AV ratios and significantly reduces traffic fluctuations with minimal computational overhead. This study provides a scalable, data-driven solution for improving safety in realistic mixed traffic environments, and the code is publicly available.

Takeaways, Limitations

Takeaways:
Presenting an effective solution to improve traffic flow stability in a mixed traffic environment of autonomous vehicles and conventional vehicles.
Effectively modeling the vehicle following dynamics of complex HDVs with AdapKoopnet.
Real-time, scalable, and optimal CAV control through AdapKoopPC.
Excellent performance even at low autonomous vehicle ratios.
Ensuring reproducibility and expandability of research through open disclosure of developed code.
Limitations:
The learning performance of AdapKoopnet may depend on the quality and quantity of data used.
Further validation of generalization performance in real road environments is needed.
Robustness assessment is needed for various traffic situations and road conditions.
Further research is needed on the interpretability of linear system representations in high-dimensional spaces.
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