Junyi Ji, Ph.D.

• Scalable analysis of stop-and-go waves: Representation, measurements and insights

Junyi Ji, Derek Gloudemans, Yanbing Wang, Gergely Zachár, William Barbour, Jonathan Sprinkle, Benedetto Piccoli, Daniel B. Work.

Transportation Research Part C: Emerging Technologies, 2026, 182: 105385.

Visit Gallery of Traffic Wave Dynamics

• Real-world deployment and assessment of a multi-agent reinforcement learning-based variable speed limit control system

Yuhang Zhang, Zhiyao Zhang, Junyi Ji, Marcos Quiñones-Grueiro, William Barbour, Derek Gloudemans, Gergely Zachár, Clay Weston, Gautam Biswas, Daniel B. Work.

IEEE Intelligent Transportation Systems Magazine, 2026, 18(2): 68-85

• Stop-and-go wave super-resolution reconstruction via iterative refinement

Junyi Ji, Alex Richardson, Derek Gloudemans, Gergely Zachár, Matthew Nice, William Barbour, Jonathan Sprinkle, Benedetto Piccoli, Daniel B. Work

Transportation Research Part C: Emerging Technologies, 2025, 180: 105313.

• Real-time freeway traffic anomalous event detection system via radar detector sensors

Austin Coursey, Junyi Ji, Zhiyao Zhang, William Barbour, Marcos Quinones-Grueiro, Tyler Derr, Gautam Biswas, Daniel B. Work.

Proceedings of the ACM/IEEE 16th International Conference on Cyber-Physical Systems (ICCPS ’25, CPS-IoT Week), 2025.

• Traffic control via connected and automated vehicles (CAVs): An open-road field experiment with 100 CAVs

Jonathan W Lee, Han Wang, Kathy Jang, Nathan Lichtlé, Amaury Hayat, Matthew Bunting, Arwa Alanqary, William Barbour, Zhe Fu, Xiaoqian Gong, George Gunter, Sharon Hornstein, Abdul Rahman Kreidieh, Matthew W Nice, William A Richardson, Adit Shah, Eugene Vinitsky, Fangyu Wu, Shengquan Xiang, Sulaiman Almatrudi, Fahd Althukair, Rahul Bhadani, Joy Carpio, Raphael Chekroun, Eric Cheng, Maria Teresa Chiri, Fang-Chieh Chou, Ryan Delorenzo, Marsalis Gibson, Derek Gloudemans, Anish Gollakota, Junyi Ji, Alexander Keimer, Nour Khoudari, Malaika Mahmood, Mikail Mahmood, Hossein Nick Zinat Matin, Sean Mcquade, Rabie Ramadan, Daniel Urieli, Xia Wang, Yanbing Wang, Rita Xu, Mengsha Yao, Yiling You, Gergely Zachár, Yibo Zhao, Mostafa Ameli, Mirza Najamuddin Baig, Sarah Bhaskaran, Kenneth Butts, Manasi Gowda, Caroline Janssen, John Lee, Liam Pedersen, Riley Wagner, Zimo Zhang, Chang Zhou, Daniel B Work, Benjamin Seibold, Jonathan Sprinkle, Benedetto Piccoli, Maria Laura Delle Monache, Alexandre M Bayen.

IEEE Control Systems, 2025, 45(1): 28–60.

• On the constrained CAV platoon control problem

MirSaleh Bahavarnia, Junyi Ji, Ahmad F. Taha, Daniel B. Work.

IEEE Transactions on Control of Network Systems, 2025, 12(2): 1552–1564.

• FT-AED: Benchmark dataset for early freeway traffic anomalous event detection

Austin Coursey, Junyi Ji (co-corresponding), Marcos Quinones-Grueiro, William Barbour, Yuhang Zhang, Tyler Derr, Gautam Biswas, Daniel B. Work.

Advances in Neural Information Processing Systems 37 (NeurIPS 2024), Datasets and Benchmarks Track, 2024.

• A middle way to traffic enlightenment

Matthew W. Nice, George Gunter, Junyi Ji, Yuhang Zhang, Matthew Bunting, Will Barbour, Jonathan Sprinkle, Dan Work.

ACM/IEEE 15th International Conference on Cyber-Physical Systems (ICCPS 2024), 2024.

• CAV traffic control to mitigate the impact of congestion from bottlenecks: A linear quadratic regulator approach and microsimulation study

Suyash C. Vishnoi, Junyi Ji, MirSaleh Bahavarnia, Yuhang Zhang, Ahmad F. Taha, Christian G. Claudel, Daniel B. Work.

ACM Journal on Autonomous Transportation Systems, 2024, 1(2).

• So you think you can track?

Derek Gloudemans, Gergely Zachár, Yanbing Wang, Junyi Ji, Matthew Nice, Matt Bunting, William W. Barbour, Jonathan Sprinkle, Benedetto Piccoli, Maria Laura Delle Monache, Alexandre M. Bayen, Benjamin Seibold, Daniel B. Work.

IEEE/CVF Winter Conference on Applications of Computer Vision (WACV), 2024, pp. 4516–4526.

• Automatic vehicle trajectory data reconstruction at scale

Yanbing Wang, Derek Gloudemans, Junyi Ji, Zi Nean Teoh, Lisa Liu, Gergely Zachár, William Barbour, Daniel Work

Transportation Research Part C: Emerging Technologies, 2023, 160: 104520.

• I-24 MOTION: An instrument for freeway traffic science

Derek Gloudemans, Yanbing Wang, Junyi Ji, Gergely Zachar, Will Barbour, Eric Hall, Meredith Cebelak, Lee Smith, Daniel B. Work.

Transportation Research Part C: Emerging Technologies, 2023, 155: 104311.

• The station-free sharing bike demand forecasting with a deep learning approach and large-scale datasets

Chengcheng Xu, Junyi Ji, Pan Liu.

Transportation Research Part C: Emerging Technologies, 2018, 95: 47-60. 

Under Review

• Multi-Mode Control Barrier Functions for Safe Longitudinal Vehicle Control: Open-Loop and Closed-Loop Field Experiments

Kate Sanborn, Junyi Ji, George Gunter, Matt Bunting, Daniel B. Work, Jonathan Sprinkle.

Uner review, 2026.

• Emission reduction potential of freeway stop-and-go wave smoothing

Junyi Ji, Derek Gloudemans, Gergely Zachár, William Barbour, Benedetto Piccoli, Jonathan Sprinkle, Daniel B. Work.

Under review, 2026.

• Measuring the state of open science in transportation using large language models

Junyi Ji*, Ruth Lu*, Linda Belkessa, Liming Wang, Silvia Varotto, Yongqi Dong, Nicolas Saunier, Gregory S. MacFarlane, Mostafa Ameli, Bahman Madadi, Cathy Wu.

*Junyi Ji and Ruth Lu proudly co-lead this project.

Under review, 2026. Visit the project page and  Open Science Explorer for Transportation Research

• Calibrating adaptive smoothing methods for freeway traffic reconstruction

Junyi Ji, Derek Gloudemans, Gergely Zachár, Matthew Nice, William Barbour, Daniel B. Work.

Under review, 2026.

• Energy-saving control of freeway traffic: Field experiments and results

Sean McQuade, Sulaiman Almatrudi, Nour Khoudari, Han Wang, Mengsha Yao, Fahd Althukair, Arwa Alanqary, Mostafa Ameli, Mirza Baig, William Barbour, Rahul Bhadani, Matthew Bunting, Kenneth Butts, Joy Carpio, Maria Teresa Chiri, Fang-Chieh Chou, Ryan DeLorenzo, Christopher Denaro, Zhe Fu, Derek Gloudemans, Anish Gollakota, Xiaoqian Gong, George Gunter, Amaury Hayat, Sharon Hornstein, Kathy Jang, Caroline Janssen, Junyi Ji, Abdul Kreidieh, Nathan Lichtlé, Jon Lee, Hossein Zinat Matin, Matthew Nice, Liam Pedersen, Rabie Ramadan, William Richardson, Anthony Sbarra, Adit Shah, Eugene Vinitsky, Riley Wagner, Xia Wang, Yanbing Wang, Fangyu Wu, Shengquan Xiang, Ryan Weightman, Gergely Zachár, Terry Zhang, Raphael Chekroun, Alexander Keimer, Malaika Mahmood, Mikail Mahmood, Daniel Urieli, Ruotong Xu, Yiling You, Jonathan Lee, Maria Laura Delle Monache, Benedetto Piccoli, Benjamin Seibold, Daniel B. Work, Alexandre Bayen.

Under review, 2026.

• Noise-aware generative microscopic traffic simulation

Vindula Jayawardana, Catherine Tang, Junyi Ji, Jonah Philion, Xue Bin Peng, and Cathy Wu.

Under review, 2026.

• Trajectory data collecting and sharing: Where are we? Where shall we go?

Christine Buisson, Rim Slama, Zuduo Zheng, Mohammad Ali Arman, Benjamin Coifman, Biagio Ciuffo, Derek Gloudemans, Samer Hamdar, Xiangwang Hu, Junyi Ji, Rui Jiang, Abhijnan Maji, Michalis Makridis, Hani Mahmassani, Marcello Montanino, Vincenzo Punzo, Chris Tampere, Alireza Talebpour, Junfang Tian, Dan Work, Shi-Teng Zheng.

Under review, 2026.

Working Paper