journal article·2025-08-27Open access

DeepSIGNAL-ITS—Deep Learning Signal Intelligence for Adaptive Traffic Signal Control in Intelligent Transportation Systems

Mirabela Melinda Medvei, Alin-Viorel Bordei, Ștefania Loredana Niță, Nicolae Țăpuș

Applied Sciences· Volume 15· Issue 17

Abstract

Urban traffic congestion remains a major contributor to vehicle emissions and travel inefficiency, prompting the need for adaptive and intelligent traffic management systems. In response, we introduce DeepSIGNAL-ITS (Deep Learning Signal Intelligence for Adaptive Lights in Intelligent Transportation Systems), a unified framework that leverages real-time traffic perception and learning-based control to optimize signal timing and reduce congestion. The system integrates vehicle detection via the YOLOv8 architecture at roadside units (RSUs) and manages signal control using Proximal Policy Optimization (PPO), guided by global traffic indicators such as accumulated vehicle waiting time. Secure communication between RSUs and cloud infrastructure is ensured through Transport Layer Security (TLS)-encrypted data exchange. We validate the framework through extensive simulations in SUMO across diverse urban settings. Simulation results show an average 30.20% reduction in vehicle waiting time at signalized intersections compared to baseline fixed-time configurations derived from OpenStreetMap (OSM). Furthermore, emissions assessed via the HBEFA-based model in SUMO reveal measurable reductions across pollutant categories, underscoring the framework’s dual potential to improve both traffic efficiency and environmental sustainability in simulated urban environments.
Source: crossref · Quality: baseline

Research context

OpenAlex topics: Traffic Prediction and Management Techniques · Traffic control and management · Transportation Planning and Optimization

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Computer Science Department, Faculty of Automatic Control and Computer Science, Politehnica University of Bucharest, 060042 Bucharest, Romania

Computer and Cyber Security Department, Faculty of Informations Systems and Cyber Security, Military Technical Academy ‘Ferdinand I’, 050141 Bucharest, Romania

References (80)

Show source-provided references
1. Health and Environmental Effects of Vehicular Traffic Emission in Yenagoa City Bayelsa State, Nigeria
2. Road Traffic Status and Carbon Emission Estimation Methods10.22158/wjssr.v7n2p34 ↗
3. Tang, C.R., Hsieh, J.W., and Teng, S.Y. (2023). Cooperative Multi-Objective Reinforcement Learning for Traffic Signal Control and Carbon Emission Reduction. arXiv.
4. Reinforcement Learning Based Urban Traffic Signal Control and Its Impact Assessment on Environmental Pollution10.1051/e3sconf/202453601021 ↗
5. Elouni, M., Abdelghaffar, H.M., and Rakha, H.A. (2021). Adaptive Traffic Signal Control: Game-Theoretic Decentralized vs. Centralized Perimeter Control. Sensors, 21.10.3390/s21010274 ↗
6. INTEGRATION OF IOT AND ARTIFICIAL INTELLIGENCE INTO INTELLIGENT TRANSPORTATION SYSTEMS
7. Increasing the economic development of the EU countries through the implementation of the “Smart City” concept
8. Sneharika, P., Anvitha, B.C.S.S., Kumar, A.M., T, P., Devi, M.M.Y., and Kumar, S. (2024, January 9–11). A Comprehensive Analysis on Traffic Prediction Methods for Real-World Deployment: Challenges, Cause and Scope. Proceedings of the 2024 International Conference on Communication, Computer Sciences and Engineering (IC3SE), Gautam Buddha Nagar, India.10.1109/IC3SE62002.2024.10593056 ↗
9. Development of a smart city information system10.1051/e3sconf/202130105002 ↗
10. Shaheen, S., and Finson, R. (2013). Intelligent Transportation Systems, Transportation Sustainability Research Center, Institute of Transportation Studies, University of California. Available online: https://escholarship.org/uc/item/3hh2t4f9.
11. Barbaresso, J., Cordahi, G., Garcia, D., Hill, C., Jendzejec, A., and Wright, K. (2014). USDOT’s Intelligent Transportation Systems (ITS) ITS Strategic Plan, 2015–2019, United States Department of Transportation. Technical Report.
12. Directives of the European Union on Intelligent Transport Systems and their impact on the Republic of Croatia
13. Machine learning for next-generation intelligent transportation systems: A survey10.1002/ett.4427 ↗
14. Ghosh, R., Pragathi, R., Ullas, S., and Borra, S. (2017, January 15–16). Intelligent transportation systems: A survey. Proceedings of the 2017 International Conference on Circuits, Controls, and Communications (CCUBE), Bangalore, India.10.1109/CCUBE.2017.8394167 ↗
15. Intelligent Transportation Systems: An Overview of Current Trends and Limitations
16. Deep Learning for Intelligent Transportation Systems: A Survey of Emerging Trends10.1109/TITS.2019.2929020 ↗
17. Intelligent Traffic Light via Policy-based Deep Reinforcement Learning
18. Hybrid CNN-LSTM and Proximal Policy Optimization Model for Traffic Light Control in a Multi-Agent Environment10.1109/ACCESS.2025.3541042 ↗
19. Smart City Traffic Flow and Signal Optimization Using STGCN-LSTM and PPO Algorithms10.1109/ACCESS.2024.3519512 ↗
20. Spatio-Temporal vehicle traffic flow prediction using multivariate CNN and LSTM model10.1016/j.matpr.2021.04.249 ↗
21. Comprehensive review on vehicle Detection, classification and counting on highways10.1016/j.neucom.2023.126627 ↗
22. Berwo, M.A., Khan, A., Fang, Y., Fahim, H., Javaid, S., Mahmood, J., Abideen, Z.U., and MS, S. (2023). Deep learning techniques for vehicle detection and classification from images/videos: A survey. Sensors, 23.10.3390/s23104832 ↗
23. Vehicle detection and traffic density estimation using ensemble of deep learning models10.1007/s11042-022-13659-5 ↗
24. A Review of Yolo algorithm developments10.1016/j.procs.2022.01.135 ↗
25. Krishna, N.M., Reddy, R.Y., Reddy, M.S.C., Madhav, K.P., and Sudham, G. (2021, January 2–4). Object detection and tracking using YOLO. Proceedings of the 2021 Third International Conference on Inventive Research in Computing Applications (ICIRCA), IEEE, Coimbatore, India.10.1109/ICIRCA51532.2021.9544598 ↗
26. Sarda, A., Dixit, S., and Bhan, A. (2021, January 28–30). Object detection for autonomous driving using yolo algorithm. Proceedings of the 2021 2nd International Conference on Intelligent Engineering and Management (ICIEM), IEEE, London, UK.10.1109/ICIEM51511.2021.9445365 ↗
27. Schulman, J., Wolski, F., Dhariwal, P., Radford, A., and Klimov, O. (2017). Proximal policy optimization algorithms. arXiv.
28. Sharma, R., and Garg, P. (2024, January 25–26). Reinforcement Learning Advances in Autonomous Driving: A Detailed Examination of DQN and PPO. Proceedings of the 2024 Global Conference on Communications and Information Technologies (GCCIT), Bangalore, India.10.1109/GCCIT63234.2024.10862532 ↗
29. Jiang, Y., and Wei, Y. (2024, January 1–3). Autonomous Vehicles Driving at Unsigned Intersections Based on Improved Proximal Policy Optimization Algorithm. Proceedings of the 2024 7th International Conference on Advanced Algorithms and Control Engineering (ICAACE), Shanghai, China.10.1109/ICAACE61206.2024.10548445 ↗
30. Zhao, J., Zhao, Y., Li, W., and Zeng, C. (2024, January 17–19). End-to-End Autonomous Driving Algorithm Based on PPO and Its Implementation. Proceedings of the 2024 IEEE 13th Data Driven Control and Learning Systems Conference (DDCLS), Kaifeng, China.10.1109/DDCLS61622.2024.10606596 ↗
31. Yao, L. (2019, January 9–11). An effective vehicle counting approach based on CNN. Proceedings of the 2019 IEEE 2nd International Conference on Electronics and Communication Engineering (ICECE), IEEE, Xi’an, China.10.1109/ICECE48499.2019.9058582 ↗
32. Majumder, M., and Wilmot, C. (2023). Automated vehicle counting from pre-recorded video using you only look once (YOLO) object detection model. J. Imaging, 9.10.3390/jimaging9070131 ↗
33. Asha, C., and Narasimhadhan, A. (2018, January 16–17). Vehicle counting for traffic management system using YOLO and correlation filter. Proceedings of the 2018 IEEE International Conference on Electronics, Computing and Communication Technologies (CONECCT), IEEE, Bangalore, India.10.1109/CONECCT.2018.8482380 ↗
34. EnsembleNet: A hybrid approach for vehicle detection and estimation of traffic density based on faster R-CNN and YOLO models10.1007/s00521-022-07940-9 ↗
35. Valdovinos-Chacón, G., Ríos-Zaldivar, A., Valle-Cruz, D., and Lara, E.R. (2025). Integrating IoT and YOLO-Based AI for Intelligent Traffic Management in Latin American Cities. Artificial Intelligence in Government, Springer.10.1007/978-3-031-87623-3_10 ↗
36. Faster CNN-based vehicle detection and counting strategy for fixed camera scenes10.1007/s11042-022-12370-9 ↗
37. A framework for real-time vehicle counting and velocity estimation using deep learning10.1016/j.suscom.2023.100927 ↗
38. Zhang, H., Zhang, Q., Gong, Y., Yao, F., and Xiao, P. (2025). MDCFVit-YOLO: A model for nighttime infrared small target vehicle and pedestrian detection. PLoS ONE, 20.10.1371/journal.pone.0324700 ↗
39. Biswas, M. (2025). Optimising YOLO and ByteTrack for Robust Vehicle Counting and Classification in Adverse Weather: A Computer-Vision-Based Traffic Monitoring Study Using New Zealand Data. [Master’s Thesis, Unitec Institute of Technology].
40. PMSA-YOLO: Lightweight vehicle detection with parallel multi-scale aggregation and attention mechanism10.1117/1.JEI.34.3.033043 ↗
41. Rafique, M.T., Mustafa, A., and Sajid, H. (2024). Reinforcement Learning for Adaptive Traffic Signal Control: Turn-Based and Time-Based Approaches to Reduce Congestion. arXiv.
42. Shashi, F.I., Sultan, S.M., Khatun, A., Sultana, T., and Alam, T. (2021, January 28–30). A study on deep reinforcement learning based traffic signal control for mitigating traffic congestion. Proceedings of the 2021 IEEE 3rd Eurasia Conference on Biomedical Engineering, Healthcare and Sustainability (Ecbios), IEEE, Tainan, Taiwan.10.1109/ECBIOS51820.2021.9510422 ↗
43. Wang, X., Abdulhai, B., and Sanner, S. (2023). Abdulhai, B.; Sanner, S. A critical review of traffic signal control and a novel unified view of reinforcement learning and model predictive control approaches for adaptive traffic signal control. Handbook on Artificial Intelligence and Transport, Edward Elgar Publishing.10.4337/9781803929545.00029 ↗
44. A review of reinforcement learning applications in adaptive traffic signal control10.1049/itr2.12208 ↗
45. Huang, Q. (2020, January 1–2). Model-based or model-free, a review of approaches in reinforcement learning. Proceedings of the 2020 International Conference on Computing and Data Science (CDS). IEEE, Stanford, CA, USA.10.1109/CDS49703.2020.00051 ↗
46. Liu, X.Y., Zhu, M., Borst, S., and Walid, A. (2023). Deep reinforcement learning for traffic light control in intelligent transportation systems. arXiv.
47. VB, S.S.K., and Thiruvenkadakrishnan, S. (2025, January 19–21). Traffic Signal Optimization using Real-Time Pedestrian and Vehicle Counts. Proceedings of the 2025 International Conference on Intelligent Computing and Control Systems (ICICCS), IEEE, Changchun, China.
48. Swapno, S., Nobel, S., Meena, P., Meena, V., Azar, A.T., Haider, Z., and Tounsi, M. (2024). A reinforcement learning approach for reducing traffic congestion using deep Q learning. Sci. Rep., 14.10.1038/s41598-024-75638-0 ↗
49. Medvei, M.M., Dima, G.A., and Ţăpuş, N. (2021, January 4–6). Approaching traffic congestion with double deep Q-networks. Proceedings of the 2021 20th RoEduNet Conference: Networking in Education and Research (RoEduNet), IEEE, Iasi, Romania.10.1109/RoEduNet54112.2021.9638310 ↗
50. Adaptive traffic signal control for road networks based on dueling double deep q-network
51. Attendlight: Universal attention-based reinforcement learning model for traffic signal control
52. Wijayarathna, K., and Lakmal, H. (2024, January 23–24). Adaptive Traffic Control Framework for Urban Intersections. Proceedings of the 1st International Conference on Advanced Computing Technologies, Ghaziabad, India.
53. Li, Z., Xu, C., and Zhang, G. (2021). A deep reinforcement learning approach for traffic signal control optimization. arXiv.
54. CoTV: Cooperative control for traffic light signals and connected autonomous vehicles using deep reinforcement learning10.1109/TITS.2023.3276416 ↗
55. Improving traffic signal control operations using proximal policy optimization10.1049/itr2.12286 ↗
56. Li, M., Pan, X., Liu, C., and Li, Z. (2025). Federated deep reinforcement learning-based urban traffic signal optimal control. Sci. Rep., 15.10.1038/s41598-025-91966-1 ↗
57. An adaptive traffic signal control scheme with Proximal Policy Optimization based on deep reinforcement learning for a single intersection10.1016/j.engappai.2025.110440 ↗
58. Kwesiga, D.K., Guin, A., and Hunter, M. (2025). Adaptive Traffic Signal Control based on Multi-Agent Reinforcement Learning. Case Study on a simulated real-world corridor. arXiv.
59. Duan, L., and Zhao, H. (2025). An Adaptive Signal Control Model for Intersection Based on Deep Reinforcement Learning Considering Carbon Emissions. Electronics, 14.10.3390/electronics14081664 ↗
60. Duan, L., Nie, J., Liang, R., Zhao, H., and He, R. (2024, January 27–29). Adaptive Traffic Signal Control Based on A Modified Proximal Policy Optimization Algorithm. Proceedings of the 2024 4th International Conference on Artificial Intelligence, Robotics, and Communication (ICAIRC), IEEE, Xiamen, China.10.1109/ICAIRC64177.2024.10899921 ↗
61. Zhou, K., Zhang, C., Zhan, F., Liu, W., and Li, Y. (2025). Using a single actor to output personalized policy for different intersections. arXiv.
62. CLlight: Enhancing representation of multi-agent reinforcement learning with contrastive learning for cooperative traffic signal control10.1016/j.eswa.2024.125578 ↗
63. Michailidis, P., Michailidis, I., Lazaridis, C.R., and Kosmatopoulos, E. (2025). Traffic Signal Control via Reinforcement Learning: A Review on Applications and Innovations. Infrastructures, 10.10.3390/infrastructures10050114 ↗
64. Li, Y., He, J., and Gao, Y. (2021, January 23–25). Intelligent traffic signal control with deep reinforcement learning at single intersection. Proceedings of the 2021 7th International Conference on Computing and Artificial Intelligence, Guiyang, China.10.1145/3467707.3467767 ↗
65. Zhang, Z., Gunter, G., Quinones-Grueiro, M., Zhang, Y., Barbour, W., Biswas, G., and Work, D. (2024). Phase Re-service in Reinforcement Learning Traffic Signal Control. arXiv.10.1109/ITSC58415.2024.10920279 ↗
66. Integrating public transit signal priority into max-pressure signal control: Methodology and simulation study on a downtown network10.1016/j.trc.2022.103614 ↗
67. Wei, H., Xu, N., Zhang, H., Zheng, G., Zang, X., Chen, C., Zhang, W., Zhu, Y., Xu, K., and Li, Z. (2019, January 3–7). Colight: Learning network-level cooperation for traffic signal control. Proceedings of the 28th ACM International Conference on Information and Knowledge Management, Beijing, China.10.1145/3357384.3357902 ↗
68. Wei, H., Chen, C., Zheng, G., Wu, K., Gayah, V., Xu, K., and Li, Z. (2019, January 4–8). Presslight: Learning max pressure control to coordinate traffic signals in arterial network. Proceedings of the 25th ACM SIGKDD International Conference on Knowledge Discovery & Data Mining, Anchorage, AK, USA.10.1145/3292500.3330949 ↗
69. Chen, C., Wei, H., Xu, N., Zheng, G., Yang, M., Xiong, Y., Xu, K., and Li, Z. (2020, January 7–12). Toward a thousand lights: Decentralized deep reinforcement learning for large-scale traffic signal control. Proceedings of the AAAI Conference on Artificial Intelligence, New York, NY, USA.10.1609/aaai.v34i04.5744 ↗
70. Zang, X., Yao, H., Zheng, G., Xu, N., Xu, K., and Li, Z. (2020, January 7–12). Metalight: Value-based meta-reinforcement learning for traffic signal control. Proceedings of the AAAI Conference on Artificial Intelligence, New York, NY, USA.10.1609/aaai.v34i01.5467 ↗
71. Lin, J.P., and Sun, M.T. (December, January 30). A YOLO-Based Traffic Counting System. Proceedings of the 2018 Conference on Technologies and Applications of Artificial Intelligence (TAAI), Taichung, Taiwan.10.1109/TAAI.2018.00027 ↗
72. Edge Computing with Artificial Intelligence: A Machine Learning Perspective10.1145/3555802 ↗
73. Han, B.G., Lee, J.G., Lim, K.T., and Choi, D.H. (2020). Design of a Scalable and Fast YOLO for Edge-Computing Devices. Sensors, 20.10.3390/s20236779 ↗
74. Rahman, Z., Ami, A.M., and Ullah, M.A. (2020, January 5–7). A Real-Time Wrong-Way Vehicle Detection Based on YOLO and Centroid Tracking. Proceedings of the 2020 IEEE Region 10 Symposium (TENSYMP), Dhaka, Bangladesh.10.1109/TENSYMP50017.2020.9230463 ↗
75. OpenStreetMap history for intrinsic quality assessment: Is OSM up-to-date?10.1186/s40965-019-0067-x ↗
76. Online RL-based cloud autoscaling for scientific workflows: Evaluation of Q-Learning and SARSA10.1016/j.future.2024.04.014 ↗
77. Barceló, J. (2010). Traffic Simulation with SUMO—Simulation of Urban Mobility. Fundamentals of Traffic Simulation, Springer.10.1007/978-1-4419-6142-6 ↗
78. European Commission (2025, August 01). Communication from the Commission to the European Parliament, the Council, the European Economic and Social Committee and the Committee of the Regions: Urban Mobility Package: Together Towards Competitive and Resource-Efficient Urban Mobility, Available online: https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:52013DC0913.
79. (2020). Intelligent Transport Systems—ESafety—Part 1: Traffic Signal Control Interface—Functional Requirements. Standard No. CEN/TS 17444-1. Technical Report.
80. INFRAS (2022). Handbook Emission Factors for Road Transport (HBEFA) Version 4.2, INFRAS. Available online: https://www.hbefa.net/e/index.html.