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Learning Multi-intersection Traffic Signal Control via Coevolutionary Multi-Agent Reinforcement Learning
  • Wubing Chen
Wubing Chen
Nanjing University

Corresponding Author:[email protected]

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Effective management of multi-intersection traffic  signal control (MTSC) is vital for intelligent transportation  systems.  Multi-agent reinforcement learning (MARL) has shown  promise in achieving MTSC.  However, existing MARL-based  MTSC algorithms have primarily focused on capturing the  spatial relationship between multi-intersection traffic signals  but have overlooking the importance of the temporally stable  traffic pattern.  This pattern refers to the fixed positions and  relatively stable traffic flow between intersections over short  periods in real-world MTSC scenarios, which indicates that the  learned spatial relationships between traffic signals should co-  evolve over time.  To this end, we propose a novel algorithm  called Coevolutionary Multi-Agent Reinforcement Learning (Co-  evoMARL).  CoevoMARL employs a graph neural network to  capture the complex spatial interaction network among traffic  signals.  Furthermore, we propose a relationship-driven progres-  sive LSTM (RDP-LSTM) that dynamically evolves the learned  spatial interaction network over time by leveraging insights from  the temporally stable traffic pattern.  To accelerate convergence,  we also propose the mutual information reward optimization  (MIRO) technique, which strengthens the correlation between  policy learning and high-performance samples by using a mutual  information-based intrinsic reward.  Experimental results on both  synthetic and real-world datasets demonstrate the superiority of  CoevoMARL over existing MTSC algorithms, providing valuable  insights into incorporating the temporally stable traffic pattern.