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Multi-agent reinforcement learning (MARL) has shown significant potential in traffic signal control (TSC). However, current MARL-based methods often suffer from insufficient generalization due to the fixed traffic patterns and road network…

Multiagent Systems · Computer Science 2025-03-13 Yihong Li , Chengwei Zhang , Furui Zhan , Wanting Liu , Kailing Zhou , Longji Zheng

Rapid urbanization in cities like Bangalore has led to severe traffic congestion, making efficient Traffic Signal Control (TSC) essential. Multi-Agent Reinforcement Learning (MARL), often modeling each traffic signal as an independent agent…

Machine Learning · Computer Science 2026-05-19 Sayambhu Sen , Shalabh Bhatnagar

Traffic signal control has the potential to reduce congestion in dynamic networks. Recent studies show that traffic signal control with reinforcement learning (RL) methods can significantly reduce the average waiting time. However, a…

Systems and Control · Electrical Eng. & Systems 2024-06-13 Maonan Wang , Yutong Xu , Xi Xiong , Yuheng Kan , Chengcheng Xu , Man-On Pun

Intelligent traffic signal controllers, applying DQN algorithms to traffic light policy optimization, efficiently reduce traffic congestion by adjusting traffic signals to real-time traffic. Most propositions in the literature however…

Machine Learning · Computer Science 2021-09-30 Romain Ducrocq , Nadir Farhi

Traffic congestion, primarily driven by intersection queuing, significantly impacts urban living standards, safety, environmental quality, and economic efficiency. While Traffic Signal Control (TSC) systems hold potential for congestion…

Machine Learning · Computer Science 2026-01-14 Qiang Li , Jin Niu , Lina Yu

We introduce Traffic-R1, a 3B-parameter foundation model with human-like reasoning for Traffic signal control (TSC), developed via self-exploration and iterative reinforcement of LLM with expert guidance in a simulated traffic environment.…

Artificial Intelligence · Computer Science 2025-10-23 Xingchen Zou , Yuhao Yang , Zheng Chen , Xixuan Hao , Yiqi Chen , Chao Huang , Yuxuan Liang

Reinforcement learning (RL) holds significant promise for adaptive traffic signal control. While existing RL-based methods demonstrate effectiveness in reducing vehicular congestion, their predominant focus on vehicle-centric optimization…

Machine Learning · Computer Science 2025-07-24 Bibek Poudel , Xuan Wang , Weizi Li , Lei Zhu , Kevin Heaslip

The issue of traffic congestion poses a significant obstacle to the development of global cities. One promising solution to tackle this problem is intelligent traffic signal control (TSC). Recently, TSC strategies leveraging reinforcement…

Human-Computer Interaction · Computer Science 2024-10-03 Yutian Zhang , Guohong Zheng , Zhiyuan Liu , Quan Li , Haipeng Zeng

Reinforcement learning (RL) for traffic signal control (TSC) has shown better performance in simulation for controlling the traffic flow of intersections than conventional approaches. However, due to several challenges, no RL-based TSC has…

Machine Learning · Computer Science 2022-06-22 Arthur Müller , Matthia Sabatelli

Efficient traffic control (TSC) is essential for urban mobility, but traditional systems struggle to handle the complexity of real-world traffic. Multi-agent Reinforcement Learning (MARL) offers adaptive solutions, but online MARL requires…

Artificial Intelligence · Computer Science 2025-03-19 Rohit Bokade , Xiaoning Jin

In this paper we revisit some of the fundamental premises for a reinforcement learning (RL) approach to self-learning traffic lights. We propose RLight, a combination of choices that offers robust performance and good generalization to…

Machine Learning · Computer Science 2021-11-23 Sierk Kanis , Laurens Samson , Daan Bloembergen , Tim Bakker

Recent work in decentralized, schedule-driven traffic control has demonstrated the ability to significantly improve traffic flow efficiency in complex urban road networks. However, in situations where vehicle volumes increase to the point…

Artificial Intelligence · Computer Science 2019-03-12 Hsu-Chieh Hu , Stephen F. Smith

Multi-agent Deep Reinforcement Learning (MADRL) based traffic signal control becomes a popular research topic in recent years. To alleviate the scalability issue of completely centralized RL techniques and the non-stationarity issue of…

Artificial Intelligence · Computer Science 2023-09-08 Hankang Gu , Shangbo Wang , Xiaoguang Ma , Dongyao Jia , Guoqiang Mao , Eng Gee Lim , Cheuk Pong Ryan Wong

Traffic signal control is a significant part of the construction of intelligent transportation. An efficient traffic signal control strategy can reduce traffic congestion, improve urban road traffic efficiency and facilitate people's lives.…

Machine Learning · Computer Science 2022-03-14 Ruijie Qi , Jianbin Huang , He Li , Qinglin Tan , Longji Huang , Jiangtao Cui

Traffic signal control (TSC) plays a central role in reducing congestion and maintaining urban mobility. This dissertation introduces DGLight, a critic-guided reinforcement-learning framework for adapting a pretrained large language model…

Machine Learning · Computer Science 2026-04-29 Chenbo Yu

Reinforcement learning methods have proposed promising traffic signal control policy that can be trained on large road networks. Current SOTA methods model road networks as topological graph structures, incorporate graph attention into deep…

Multiagent Systems · Computer Science 2024-12-25 Sunbowen Lee , Hongqin Lyu , Yicheng Gong , Yingying Sun , Chao Deng

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

Traffic signal control is one of the most effective methods of traffic management in urban areas. In recent years, traffic control methods based on deep reinforcement learning (DRL) have gained attention due to their ability to exploit…

Machine Learning · Computer Science 2021-07-22 Majid Raeis , Alberto Leon-Garcia

Although Reinforcement Learning (RL)-based Traffic Signal Control (TSC) methods have been extensively studied, their practical applications still raise some serious issues such as high learning cost and poor generalizability. This is…

Machine Learning · Computer Science 2025-02-18 Yutong Ye , Yingbo Zhou , Zhusen Liu , Xiao Du , Hao Zhou , Xiang Lian , Mingsong Chen

This paper presents the results of a new deep learning model for traffic signal control. In this model, a novel state space approach is proposed to capture the main attributes of the control environment and the underlying temporal traffic…

Systems and Control · Electrical Eng. & Systems 2024-12-20 Matthew Muresan , Liping Fu , Guangyuan Pan