Research Publications and Presentations

Journal Articles (*Corresponding Author)

  1. Davatgari, A., Cokyasar*, T., Subramanyam, A., Larson, J., & Mohammadian, A. K. (2024). Electric vehicle supply equipment location and capacity allocation problem. European Journal of Operational Research, 317, 953–966. [Available here]
  2. Davatgari, A., Cokyasar*, T., Verbas, O., & Mohammadian, A. K. (2024). Heuristic solutions to the single depot electric vehicle scheduling problem with next day operability constraints. Transportation Research Part C: Emerging Technologies, 163, 104656. [Available here]
  3. Dean, M. D., Gurumurthy, K. M., Zhou, Z., Verbas, O., Cokyasar, T., & Kockelman, K. (2024). An integrated transportation-power system model for a decarbonizing world. Transportation Planning and Technology, 47, 1277–1313. [Available here]
  4. Ng, M. T. M., Mahmassani, H. S., Verbas, O., Cokyasar, T., & Engelhardt, R. (2024). Redesigning large-scale multimodal transit networks with shared autonomous mobility services. Transportation Research Part C: Emerging Technologies, 168, 104575. [Available here]
  5. Paul, J., Gurumurthy, K. M., Cokyasar, T., Su, H., Khan, N., Auld, J., & Jia, Y. (2024). Proactive assignment strategy with human choice models for boosting pooled rideshare service. IEEE Transactions on Intelligent Transportation Systems. [Available here]
  6. Cokyasar*, T., Stinson, M., Sahin, O., Prabhakar, N., & Karbowski, D. (2023). Comparing regional energy consumption for direct drone and truck deliveries. Transportation Research Record, 2677(2), 310–327. [Available here]
  7. Cokyasar*, T., de Souza, F., Auld, J., & Verbas, O. (2022). Dynamic ride-matching for large-scale transportation systems. Transportation Research Record, 2676(3), 172–182. [Available here]
  8. Cokyasar, T., & Jin, M. (2022). Additive manufacturing capacity allocation problem over a network. IISE Transactions, 55(8), 807–820. [Available here]
  9. Cokyasar*, T., Subramanyam, A., Larson, J., Stinson, M., & Sahin, O. (2022). Time-constrained capacitated vehicle routing problem in urban e-commerce delivery. Transportation Research Record, 2677(2), 190–203. [Available here]
  10. Subramanyam, A., Cokyasar, T., Larson, J., & Stinson, M. (2022).
    Joint routing of conventional and range-extended electric vehicles in a large metropolitan network.
    Transportation Research Part C: Emerging Technologies, 144, 103830. [Available here]
  11. Cokyasar*, T. (2021). Optimization of battery swapping infrastructure for e-commerce drone delivery. Computer Communications, 168, 146–154. [Available here]
  12. Cokyasar*, T., Dong, W., Jin, M., & Verbas, İ. Ö. (2021). Designing a drone delivery network with automated battery swapping machines. Computers & Operations Research, 129, 105177. [Available here]
  13. Cokyasar, T., & Larson, J. (2020). Optimal assignment for the single-household shared autonomous vehicle problem. Transportation Research Part B: Methodological, 141, 98–115. [Available here]
  14. Cokyasar, T., Garcia-Diaz, A., & Jin, M. (2019). Optimization of size and timing of base salary increases. The Engineering Economist, 64(2), 97–115. [Available here]

In Progress and Submitted Manuscripts

  1. Bazarnovi, S., Cokyasar*, T., Verbas, O., & Mohammadian, A. K. Problem of locating and allocating charging equipment for battery electric buses under stochastic charging demand. Under Review. [Available here]
  2. Bazarnovi, S., Cokyasar*, T., Verbas, O., & Mohammadian, A. K. Scheduling optimization of electric and conventional mixed transit bus fleets. Work in Progress.
  3. Hosseini Dolatabadi, S. H., Bhuiyan, T. H., Cokyasar, T., & Subramanyam, A. An efficient branch-and-cut approach for routing of heterogeneous fleet of drones and ground vehicles to deliver time-sensitive products. Work in Progress.
  4. Kaleem, W., Cokyasar*, T., Larson, J., Verbas, O., Bhuiyan, T. H., & Subramanyam, A. Extreme-scale EV charging infrastructure planning for last-mile delivery using high-performance parallel computing. Under Review. [Available here]
  5. Ng, M. T., Mahmassani, H., Tong, D., Verbas, O., & Cokyasar, T. Joint optimization of multimodal transit frequency and shared autonomous vehicle fleet size with hybrid metaheuristic and nonlinear programming. Under Review. [Available here]
  6. Ng, T., Max, Raymer, M., Mahmassani, H., Verbas, O., & Cokyasar, T. Equity impacts of public transit network redesign with shared autonomous mobility services. Under Review. [Available here]
  7. Paul, J., Su, H., Gurumurthy, K. M., Cokyasar, T., Auld, J., & Jia, Y. A study of financial impacts of pooled rideshare based on assignment strategies. Under Review.
  8. Paul, J., Vankadaru, V., Gurumurthy, K. M., Cokyasar, T., Auld, J., & Jia, Y. Strategic deployment of TNCs for sustainable urban transportation: Insights from Austin. Under Review.
  9. Vakayil, A., de Souza, F., Cokyasar, T., Gurumurthy, K. M., & Larson, J. Large-scale dynamic ridesharing with iterative assignment. [Available here]
  10. Verbas, O., Cokyasar, T., de Camargo, P. V., Gurumurthy, K. M., Zuniga-Garcia, N., & Auld, J. Modeling transit in a fully integrated agent-based framework: Methodology and large-scale application. Under Review. [Available here]
  11. Verbas, O., Cokyasar, T., Joyce-Johnson, S., Wainwright, S., Coates, M., Rousseau, A., Aloisi, J., Stewart, A., & Auld, J. Impact of transit on mobility, equity, and economy in the Chicago metropolitan region. Under Review. [Available here]

Conference Papers

  1. Davatgari, A., Mohammadi, M. Y., Cokyasar, T., Mohammadian, A. K., & Auld, J. (2024). A label-correcting algorithm for constrained one-to-many k-shortest path problem with replenishment. In: The 15th International Conference on Ambient Systems, Networks and Technologies (ANT), Procedia Computer Science, 238, 369–376. [Available here]
  2. Davatgari, A., Verbas, O., Cokyasar, T., & Mohammadian, A. K. (2024). Optimization of electric bus scheduling and charger location. In: The 15th International Conference on Ambient Systems, Networks and Technologies (ANT), Procedia Computer Science, 238, 361–368. [Available here]
  3. Cokyasar, T., Davatgari, A., & Mohammadian, A. K. (2023). An optimization model for solving the route clustering problem. In: The 14th International Conference on Ambient Systems, Networks and Technologies (ANT), Procedia Computer Science, 220, 180–186. [Available here]
  4. Cokyasar, T., Verbas, O., & Auld, J. (2023). Electric vehicle scheduling problem with tour combinations. In: The 14th International Conference on Ambient Systems, Networks and Technologies (ANT), Procedia Computer Science, 220, 413–420. [Available here]
  5. Cokyasar, T., Verbas, O., Davatgari, A., & Mohammadian, A. K. (2023). Solving the electric vehicle scheduling problem at large-scale. In: IEEE 26th International Conference on Intelligent Transportation Systems (ITSC), 1134–1139. [Available here]
  6. Paul, J., Gurumurthy, K. M., Cokyasar, T., Su, H., Auld, J., & Jia, Y. (2023). Optimization of dynamic ride-sharing by considering user preference through discount and delay tolerance. In: IEEE 26th International Conference on Intelligent Transportation Systems (ITSC), 2770–2775. [Available here]
  7. Cokyasar, T. (2021). Delivery drone route planning over a battery swapping network. In: The 12th International Conference on Ambient Systems, Networks and Technologies (ANT), Procedia Computer Science, 184, 10–16. [Available here]
  8. Cokyasar, T., Auld, J., Javanmardi, M., Verbas, O., & de Souza, F. (2020). Analyzing energy and mobility impacts of privately-owned autonomous vehicles. In: IEEE 23rd International Conference on Intelligent Transportation Systems (ITSC), 1–6. [Available here]
  9. Cokyasar, T., Dong, W., & Jin, M. (2019). Network optimization for hybrid last-mile delivery with trucks and drones. In: IISE Annual Conference Proceedings, 1250–1255. ISBN: 978-0-9837624-8-5.
  10. Cokyasar, T., Kose, H., Dong, W., Li, X., Jin, M., & Li, W. (2018). An agent-based simulation model for optimization of spare parts sourcing with additive manufacturing. In: IISE Annual Conference Proceedings, 982–987. ISBN: 978-1-5108-6935-6.
  11. Hassler, M., Cokyasar, T., Jin, M., & Tang, R. (2018). Optimization of maintenance and infrastructure projects based on risk factors. In: IISE Annual Conference Proceedings, 624–629. ISBN: 978-1-5108-6935-6.
  12. Cokyasar, T., Garcia-Arcaya, C., & Garcia-Diaz, A. (2017). A mixed integer linear programming MATLAB-based methodology for the development of a salary administration guide. In: IISE Annual Conference Proceedings, 506–511. ISBN: 978-0-9837624-6-1.

Conference Presentations

  1. Bazarnovi, S., Cokyasar, T., Verbas, O., & Mohammadian, A. K. (2025). Strategic allocation of battery electric bus chargers under stochastic demand: A Chicago case study using metaheuristic approaches. 104th Transportation Research Board Annual Meeting. Poster presented by Bazarnovi, S. in Washington, DC, January 5-9.
  2. Borlaug, B., Sahin, O., Yip, A., Sun, J., Cokyasar, T., Mansour, C., Jadun, P., & Muratori, M. (2025). Highly resolved transportation electricity load projections for the United States. 104th Transportation Research Board Annual Meeting. Poster presented by Borlaug, B. in Washington, DC, January 5-9.
  3. Ismael, A., Sahin, O., Uhm, H.-s., Shen, H., Zuniga-Garcia, N., Huang, Y., Cokyasar, T., Gurumurthy, K. M., Auld, J., & Stinson, M. (2025). Integration and application of a freight agent-based simulation framework. 104th Transportation Research Board Annual Meeting. Poster presented by Ismael, A. in Washington, DC, January 5-9.
  4. Kaleem, W., Cokyasar, T., Larson, J., Subramanyam, A., Verbas, O., & Bhuiyan, T. H. (2025). Large scale stochastic charger location and allocation problem in last-mile delivery. 104th Transportation Research Board Annual Meeting. Poster presented by Kaleem, W. in Washington, DC, January 5-9.
  5. Ng, M., Tong, D., Mahmassani, H., Verbas, O., & Cokyasar, T. (2025). Joint optimization of pattern, headway, and fleet size of multiple urban transit lines with perceived headway consideration and passenger flow allocation. 104th Transportation Research Board Annual Meeting. Poster presented by Ng, M. in Washington, DC, January 5-9.
  6. Paul, J., Su, H., Gurumurthy, K. M., Cokyasar, T., Auld, J., & Jia, Y. (2025). A study of financial impacts of pooled rideshare based on assignment strategies. 104th Transportation Research Board Annual Meeting. Poster presented by Paul, J. in Washington, DC, January 5-9.
  7. Sahin, O., Borlaug, B., Cokyasar, T., Zuniga-Garcia, N., & Mansour, C. (2025). Analysis of load profiles for medium and heavy-duty electric vehicles: Implications for grid integration. 104th Transportation Research Board Annual Meeting. Poster presented by Sahin, O. in Washington, DC, January 5-9.
  8. Verbas, O., Cokyasar, T., Camargo, P. V. d., Gurumurthy, K. M., Zuniga-Garcia, N., & Auld, J. (2025). Modeling transit in a fully integrated agent-based framework: Methodology and large-scale application. 104th Transportation Research Board Annual Meeting. Poster presented by Verbas, O. in Washington, DC, January 5-9.
  9. Verbas, O., Cokyasar, T., Joyce-Johnson, S., Wainwright, S., Coates, M., Rousseau, A., Aloisi, J., Stewart, A., & Auld, J. (2025). Impact of transit on mobility, equity, and economy in the Chicago metropolitan region. 104th Transportation Research Board Annual Meeting. Poster presented by Verbas, O. in Washington, DC, January 5-9.
  10. Bazarnovi, S., Cokyasar, T., Verbas, O., & Mohammadian, A. K. (2024). Locating and allocating battery electric bus chargers with stochastic charging demand. INFORMS Annual Meeting. Abstract presented by Bazarnovi, S. in Seattle, WA, October 20-23.
  11. Cokyasar, T., Verbas, O., & Bhuyain, T. (2024). Optimizing e-commerce electric delivery vehicle charger locations under stochastic demand. INFORMS Annual Meeting. Abstract to be presented in Seattle, WA, October 20-23.
  12. Davatgari, A., Cokyasar, T., Verbas, O., & Mohammadian, A. K. (2024). Heuristic approaches for the electric vehicle scheduling problem: Large-scale application with next day operability constraints. 103rd Transportation Research Board Annual Meeting. Abstract presented Jan. 7-11.
  13. Davatgari, A., Mohammadi, M. Y., Cokyasar, T., & Mohammadian, A. K. (2024). A label-correcting algorithm for constrained one-to-many k-shortest path problem with replenishment. 103rd Transportation Research Board Annual Meeting. Abstract presented by Davatgari, A., Jan. 7-11.
  14. Dean, M. D., Gurumurthy, K. M., Zhou, Z., Verbas, O., Cokyasar, T., & Kockelman, K. (2024). An integrated transportation-power system model for a decarbonizing world. 103rd Transportation Research Board Annual Meeting. Abstract presented by Dean, M., Jan. 7-11.
  15. Huang, Y., Verbas, O., Gurumurthy, K. M., Sahin, O., Cokyasar, T., Zuniga, N., & Auld, J. (2024). Future transportation electrification: Operations and impacts. Intelligent Transportation Systems America Conference and Expo. Abstract presented by Huang, Y. in Phoenix, AZ, May 25.
  16. Ng, M., Mahmassani, H., Verbas, O., Cokyasar, T., & Tong, D. (2024). Train service design problem with perceived headway consideration and passenger flow allocation for urban rail transit lines. INFORMS Annual Meeting. Abstract to be presented in Seattle, WA, October 20-23.
  17. Ng, M. T. M., Raymer, M., Mahmassani, H. S., Verbas, O., & Cokyasar, T. (2024). Can redesigning public transit network with shared autonomous mobility services improve equity? 103rd Transportation Research Board Annual Meeting. Abstract presented by Ng, M., Jan. 7-11.
  18. Ng, M. T. M., Raymer, M., Mahmassani, H. S., Verbas, O., & Cokyasar, T. (2024). Spatial and vertical equity impacts of public transit network redesign with shared autonomous mobility services. Transit Data 2024: The 9th International Workshop and Symposium on Research and Applications on the Use of Passive Data from Public Transport. Abstract presented by Ng, M. in London, UK, July 01-04.
  19. Paul, J., Gurumurthy, K. M., Cokyasar, T., Su, H., Jia, Y., & Auld, J. (2024). Integrating human factors in dynamic rideshare assignment: Willingness-to-pay for delay. 103rd Transportation Research Board Annual Meeting. Abstract presented by Paul, J., Jan. 7-11.
  20. Verbas, O., & Cokyasar, T. (2024). Charger location and scheduling optimization for battery electric buses. INFORMS International Meeting. Abstract presented by Verbas, O. in Medellin, Colombia, June 16-19.
  21. Verbas, O., Cokyasar, T., Rousseau, A., Auld, J., Joyce-Johnson, S., Aloisi, J., Stewart, A., & Barrett, G. (2024). Mobility, equity, and economic impact of transit in the Chicago metropolitan region. INFORMS Annual Meeting. Abstract to be presented in Seattle, WA, October 20-23.
  22. Cokyasar, T., Verbas, O., Davatgari, A., & Mohammadian, A. K. (2023). A heuristic solution to the single depot electric vehicle scheduling problem. INFORMS Annual Meeting. Abstract presented by Verbas, O. in Phoenix, AZ, Oct. 15-18.
  23. Davatgari, A., Cokyasar, T., Subramanyam, A., Larson, J., & Mohammadian, A. K. (2023). Electric vehicle supply equipment allocation for fixed route vehicles. IISE Annual Meeting & Expo. Abstract presented in New Orleans, LA, May 19-23.
  24. Davatgari, A., Cokyasar, T., Subramanyam, A., Larson, J., & Mohammadian, A. K. (2023). Locating and allocating chargers for fixed-route freight delivery. INFORMS Annual Meeting. Abstract presented in Phoenix, AZ, Oct. 15-18.
  25. Davatgari, A., Cokyasar, T., Subramanyam, A., & Stinson, M. (2023). Electric vehicle supply equipment location and allocation for freight electrification. Transportation Research Board Annual Meeting. Poster presented by Davatgari, A. in Washington, DC, January 8-12.
  26. Dean, M. D., Gurumurthy, K. M., Zhou, Z., Verbas, O., Cokyasar, T., & Kockelman, K. (2023). An integrated transportation-power system model for a decarbonizing world. Bridging Transportation Researchers (BTR) Online Conference. Abstract presented online by Dean, M., Aug. 9-10.
  27. Cokyasar, T. (2022). Last-mile drone and truck delivery energy comparisons. INFORMS Annual Meeting. Abstract presented in Indianapolis, IN, October 16-19.
  28. Cokyasar, T., Larson, J., Stinson, M., Sahin, O., Verbas, O., Freyermuth, V., & Uhm, H. S. (2022). Truck routing optimization for large-scale transportation networks. International Urban Freight Conference. Abstract presented by Uhm, H. S. in Long Beach, CA, May 25-27.
  29. Subramanyam, A., Cokyasar, T., Larson, J., & Stinson, M. (2022). Joint routing of conventional and range-extended electric vehicles in a large metropolitan network. INFORMS Optimization Society Conference. Abstract presented by Subramanyam, A. in Greenville, SC, March 13-15.
  30. Vakayil, A., Gurumurthy, K. M., de Souza, F., Cokyasar, T., & Larson, J. (2022). Fast and scalable shared fleet algorithms for large-scale application. INFORMS Annual Meeting. Abstract presented by Gurumurthy, K. M. in Indianapolis, IN, October 16-19.
  31. Verbas, O., Cokyasar, T., & Auld, J. (2022). Solving the electric vehicle scheduling problem at scale. INFORMS Annual Meeting. Abstract presented by Verbas, O. in Indianapolis, IN, October 16-19.
  32. Cokyasar, T. (2021). Planning routes for e-commerce delivery drones. IISE Annual Meeting & Expo. Abstract virtually presented.
  33. Stinson, M., Cokyasar, T., & Sahin, O. (2021). Mobility and sustainability impacts of advanced last-mile delivery technologies. 24th IEEE International Conference on Intelligent Transportation (ITSC2021).
  34. Cokyasar, T., Dong, W., Jin, M., & Verbas, O. (2020). Designing a drone delivery network with automated battery swapping machines. INFORMS Annual Meeting. Abstract virtually presented as an invited speaker.
  35. Cokyasar, T., & Larson, J. (2020). Optimal assignment for the single-household shared autonomous vehicle problem. IISE Annual Meeting & Expo. Abstract virtually presented.
  36. Verbas, O., Cokyasar, T., & Auld, J. (2020). Chicago transit authority transit network efficiency and the changing mobility landscape. U.S. Department of Energy’s (DOE’s) 2020 Annual Merit Review and Peer Evaluation Meeting (AMR) for the Hydrogen and Fuel Cells Program and the Vehicle Technologies Office, Poster Session EEMS088. Poster virtually presented by Verbas, O.
  37. Cokyasar, T., Dong, W., & Jin, M. (2019). Network optimization for hybrid last mile delivery with trucks and drones. INFORMS Computing Society. Abstract presented in Knoxville, TN.
  38. Cokyasar, T., Jin, M., & Willems, S. (2019). Spare parts supply chain optimization with additive manufacturing. INFORMS Computing Society. Abstract presented in Knoxville, TN.
  39. Cokyasar, T., Jin, M., & Willems, S. (2018). Spare parts supply chain optimization with additive manufacturing. INFORMS Annual Meeting. Abstract presented in Seattle, WA.