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In mixed-traffic environments, autonomous vehicles must adapt to human-controlled vehicles and other unusual driving situations. This setting can be framed as a multi-agent reinforcement learning (MARL) environment with full cooperative…

Artificial Intelligence · Computer Science 2025-09-19 Xuan Duy Ta , Bang Giang Le , Thanh Ha Le , Viet Cuong Ta

Traffic congestion in metropolitan areas is a world-wide problem that can be ameliorated by traffic lights that respond dynamically to real-time conditions. Recent studies applying deep reinforcement learning (RL) to optimize single traffic…

Machine Learning · Computer Science 2019-12-10 Zhi Zhang , Jiachen Yang , Hongyuan Zha

This study integrates Transit Signal Priority (TSP) into multi-agent reinforcement learning (MARL) based traffic signal control. The first part of the study develops adaptive signal control based on MARL for a pair of coordinated…

Artificial Intelligence · Computer Science 2024-12-02 Dickness Kakitahi Kwesiga , Suyash Chandra Vishnoi , Angshuman Guin , Michael Hunter

This paper considers optimal traffic signal control in smart cities, which has been taken as a complex networked system control problem. Given the interacting dynamics among traffic lights and road networks, attaining controller adaptivity…

Machine Learning · Computer Science 2023-11-08 Yao Zhang , Zhiwen Yu , Jun Zhang , Liang Wang , Tom H. Luan , Bin Guo , Chau Yuen

Traffic signal control (TSC) is a challenging problem within intelligent transportation systems and has been tackled using multi-agent reinforcement learning (MARL). While centralized approaches are often infeasible for large-scale TSC…

Multiagent Systems · Computer Science 2023-10-05 Rohit Bokade , Xiaoning Jin , Christopher Amato

In this thesis, I propose a family of fully decentralized deep multi-agent reinforcement learning (MARL) algorithms to achieve high, real-time performance in network-level traffic signal control. In this approach, each intersection is…

Machine Learning · Computer Science 2020-07-21 Jin Guo

Reinforcement learning (RL) emerges as a promising data-driven approach for adaptive traffic signal control (ATSC) in complex urban traffic networks, with deep neural networks substantially augmenting its learning capabilities. However,…

Artificial Intelligence · Computer Science 2025-02-25 Yuli Zhang , Shangbo Wang , Dongyao Jia , Pengfei Fan , Ruiyuan Jiang , Hankang Gu , Andy H. F. Chow

Autonomous vehicles trained through Multi-Agent Reinforcement Learning (MARL) have shown impressive results in many driving scenarios. However, the performance of these trained policies can be impacted when faced with diverse driving styles…

Robotics · Computer Science 2024-02-22 Liu Weiwei , Hu Wenxuan , Jing Wei , Lei Lanxin , Gao Lingping , Liu Yong

As travel demand increases and urban traffic condition becomes more complicated, applying multi-agent deep reinforcement learning (MARL) to traffic signal control becomes one of the hot topics. The rise of Reinforcement Learning (RL) has…

Artificial Intelligence · Computer Science 2023-06-06 Shijie Wang , Shangbo Wang

Cooperative multi-robot tasks can benefit from heterogeneity in the robots' physical and behavioral traits. In spite of this, traditional Multi-Agent Reinforcement Learning (MARL) frameworks lack the ability to explicitly accommodate policy…

Robotics · Computer Science 2023-01-19 Matteo Bettini , Ajay Shankar , Amanda Prorok

One of the challenges for multi-agent reinforcement learning (MARL) is designing efficient learning algorithms for a large system in which each agent has only limited or partial information of the entire system. While exciting progress has…

Machine Learning · Computer Science 2022-02-22 Haotian Gu , Xin Guo , Xiaoli Wei , Renyuan Xu

Reinforcement Learning (RL) in Traffic Signal Control (TSC) faces significant hurdles in real-world deployment due to limited generalization to dynamic traffic flow variations. Existing approaches often overfit static patterns and use…

Artificial Intelligence · Computer Science 2026-03-13 Sheng-You Huang , Hsiao-Chuan Chang , Yen-Chi Chen , Ting-Han Wei , I-Hau Yeh , Sheng-Yao Kuan , Chien-Yao Wang , Hsuan-Han Lee , I-Chen Wu

Previous studies that have formulated multi-agent reinforcement learning (RL) algorithms for adaptive traffic signal control have primarily used value-based RL methods. However, recent literature has shown that policy-based methods may…

Multiagent Systems · Computer Science 2025-07-03 Dickness Kakitahi Kwesiga , Angshuman Guin , Michael Hunter

Over the years, reinforcement learning has emerged as a popular approach to develop signal control and vehicle platooning strategies either independently or in a hierarchical way. However, jointly controlling both in real-time to alleviate…

Machine Learning · Computer Science 2025-08-13 Xianyue Peng , Shenyang Chen , Hang Gao , Hao Wang , H. Michael Zhang

Multi-agent reinforcement learning (MARL) requires coordinated and stable policy updates among interacting agents. Heterogeneous-Agent Trust Region Policy Optimization (HATRPO) enforces per-agent trust region constraints using…

Artificial Intelligence · Computer Science 2025-08-15 Chak Lam Shek , Guangyao Shi , Pratap Tokekar

Adaptive traffic signal control (ATSC) is crucial in reducing congestion, maximizing throughput, and improving mobility in rapidly growing urban areas. Recent advancements in parameter-sharing multi-agent reinforcement learning (MARL) have…

Machine Learning · Computer Science 2026-03-26 Yifeng Zhang , Yilin Liu , Ping Gong , Peizhuo Li , Mingfeng Fan , Guillaume Sartoretti

Multi-agent reinforcement learning (MARL) has shown promise for adaptive traffic signal control (ATSC), enabling multiple intersections to coordinate signal timings in real time. However, in large-scale settings, MARL faces constraints due…

Machine Learning · Computer Science 2026-02-10 Yongjie Fu , Lingyun Zhong , Zifan Li , Xuan Di

Many recent works have turned to multi-agent reinforcement learning (MARL) for adaptive traffic signal control to optimize the travel time of vehicles over large urban networks. However, achieving effective and scalable cooperation among…

Machine Learning · Computer Science 2023-05-26 Harsh Goel , Yifeng Zhang , Mehul Damani , Guillaume Sartoretti

Offline Multi-Agent Reinforcement Learning (MARL) is an emerging field that aims to learn optimal multi-agent policies from pre-collected datasets. Compared to single-agent case, multi-agent setting involves a large joint state-action space…

Artificial Intelligence · Computer Science 2024-12-19 Zongkai Liu , Qian Lin , Chao Yu , Xiawei Wu , Yile Liang , Donghui Li , Xuetao Ding

The state-of-the-art multi-agent reinforcement learning (MARL) methods have provided promising solutions to a variety of complex problems. Yet, these methods all assume that agents perform synchronized primitive-action executions so that…

Artificial Intelligence · Computer Science 2022-10-12 Yuchen Xiao