Research Summary
Dr. Gayah's research interests are in the areas of urban mobility, traffic flow theory, transportation operations, transportation network modeling, and transportation safety.
In the News
Research Keywords
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Projects
Recent Publications
Adaptive Action Selection Strategy of Reinforcement Learning Approach for Intelligent Traffic Light Control
Lyu, L., Ilgin Guler, S. & Gayah, V. V., 2026, (Accepted/In press) In: IEEE Transactions on Intelligent Transportation Systems.Research output: Contribution to journal › Article › peer-review
The Effect of the New York City Congestion Toll on Trips Served by Transportation Network Companies
Pandey, A., Guler, I. & Gayah, V., 2026, In: Transport Findings. 2026Research output: Contribution to journal › Article › peer-review
A novel bi-level clustering optimization approach to balance treatment of crash data
Ahmed, T. & Gayah, V. V., Sep 2025, In: Accident Analysis and Prevention. 219, 108107.Research output: Contribution to journal › Article › peer-review
C-MP: A decentralized adaptive-coordinated traffic signal control using the Max Pressure framework
Ahmed, T., Liu, H. & Gayah, V. V., Oct 2025, In: Transportation Research Part B: Methodological. 200, 103308.Research output: Contribution to journal › Article › peer-review
Data-Driven Left-Turn Restriction Decision Framework for Urban Networks: A Case Study of Downtown Pittsburgh
Ahmed, T. & Gayah, V. V., Sep 2025, In: Transportation Research Record. 2679, 9, p. 246-260 15 p.Research output: Contribution to journal › Article › peer-review
An analytical model of many-to-one carpool system performance under cost-based detour limits
Dong, X., Liu, H. & Gayah, V. V., Jun 2025, In: International Journal of Transportation Science and Technology. 18, p. 80-95 16 p.Research output: Contribution to journal › Article › peer-review
Quantifying the impacts of right-turn-on-red, exclusive turn lanes, and pedestrian movements on the efficiency of urban transportation networks
Liu, H., Xiong, Z. & Gayah, V. V., Mar 2025, In: International Journal of Transportation Science and Technology. 17, p. 52-66 15 p.Research output: Contribution to journal › Article › peer-review
Modeling economic impacts of transportation infrastructure in Pennsylvania considering spatial dependency across counties
Mahmud, A., Gayah, V. V. & Guler, S. I., 2025, (Accepted/In press) In: International Journal of Transportation Science and Technology.Research output: Contribution to journal › Article › peer-review
Estimating the Expected Change in Safety for a Potential Application of Three Intelligent Transportation System Treatments
Persaud, B., Srinivasan, R., Gayah, V., Kersavage, K., Saleem, T., Hallmark, S. & Mohammadi, C., Feb 2025, In: Transportation Research Record. 2679, 2, p. 2054-2062 9 p.Research output: Contribution to journal › Article › peer-review
Safety performance of passing zone segments on two-lane rural highways in Pennsylvania: Comparing crash modification factors from causal inference and unobserved heterogeneity models
Poudel, P., Donnell, E. T. & Gayah, V. V., Sep 2025, In: Accident Analysis and Prevention. 220, 108165.Research output: Contribution to journal › Article › peer-review
Applying model-based recursive partitioning to improve pedestrian exposure models to support transportation safety analyses
Wiegand, J. C. & Gayah, V. V., Jan 1 2025, In: Traffic Safety Research. 9, e000075.Research output: Contribution to journal › Article › peer-review
Out-of-sample prediction and interpretation for random parameter generalized linear models
Wood, J. S. & Gayah, V., Sep 2025, In: Accident Analysis and Prevention. 220, 108147.Research output: Contribution to journal › Article › peer-review
A dictionary-based Bayesian approach to optimizing left-turn restriction locations in grid networks
Zhou, D. & Gayah, V. V., Dec 2025, In: International Journal of Transportation Science and Technology. 20, p. 35-49 15 p.Research output: Contribution to journal › Article › peer-review
On the need to address fixed-parameter issues before applying random parameters: A simulation-based study
Ahmad, N., Bhowmik, T., Gayah, V. V. & Eluru, N., Mar 2024, In: Analytic Methods in Accident Research. 41, 100314.Research output: Contribution to journal › Article › peer-review
Crash modification factors of rumble strips on horizontal curves of two-lane rural roads: A propensity scores potential outcomes approach
Ahmed, T., Mahmud, A. & Gayah, V. V., Jan 2024, In: Accident Analysis and Prevention. 194, 107371.Research output: Contribution to journal › Article › peer-review