Our Experts

Journal Articles

1. Arash Ghaffar, Michael Hyland and Jean-Daniel Saphores (2023) “Meta-analysis of shared micromobility ridership determinants”, Transportation Research Part D: Transport and Environment, 121, p. 103847. Available at: 10.1016/j.trd.2023.103847. [ITS-Irvine record]
2. Tanjeeb Ahmed, Michael Hyland, Navjyoth J. S. Sarma, Suman Mitra and Arash Ghaffar (2020) “Quantifying the employment accessibility benefits of shared automated vehicle mobility services: Consumer welfare approach using logsums”, Transportation Research Part A: Policy and Practice, 141, pp. 221–247. Available at: 10.1016/j.tra.2020.09.002. [ITS-Irvine record]
3. Arash Ghaffar, Suman Mitra and Michael Hyland (2020) “Modeling determinants of ridesourcing usage: A census tract-level analysis of Chicago”, Transportation Research Part C: Emerging Technologies, 119, p. 102769. Available at: 10.1016/j.trc.2020.102769. [ITS-Irvine record]

Conference Papers

1. Arash Ghaffar, Jiangbo Yu and Michael F. Hyland (2025) “Improving Transit System Resilience Using Shared Autonomous Vehicles”, in Proceedings, 104th Annual Meeting of the Transportation Research Board. Washington, D.C.. [ITS-Irvine record]
2. Uriah Campos and Arash Ghaffar (2024) “Equitable Design of Shared E-Scooter and E-Bike Systems”. Transportation Research Board 103rd Annual Meeting. [ITS-Irvine record]
3. Arash Ghaffar, Negin Shariat and Michael Hyland (2023) “Fleet Sizing for Robo-taxi Services: Comparing Novel and State-of-the-Art Scalable Modeling Approaches”. 102nd Transportation Research Board Annual Meeting 2023. [ITS-Irvine record]
4. Tanjeeb Ahmed, Michael F. Hyland, Suman Kumar Mitra and Arash Ghaffar (2021) “Assessing the Employment Accessibility Benefits of Shared Automated Vehicle Mobility Services in Southern California”. 100th Transportation Research Board (TRB) Annual Meeting, Washington, DC. [ITS-Irvine record]
5. J.S. Navjyoth Sarma, Daisik Nam, Michael F. Hyland, Felipe Augusto de Souza, Dingtong Yang, Arash Ghaffar and I. Omer Verbas (2020) “Effective and Efficient Fleet Dispatching Strategies for Dynamically Matching AVs to Travelers in Large-scale Transportation Systems”, in 2020 IEEE 23rd International Conference on Intelligent Transportation Systems (ITSC). 2020 IEEE 23rd International Conference on Intelligent Transportation Systems (ITSC), pp. 1–6. Available at: 10.1109/ITSC45102.2020.9294340. [ITS-Irvine record]
6. Arash Ghaffar, Suman Mitra and Michael Hyland (2020) “Modeling ridesourcing trip generation: Chicago case study”, in Proceedings of the 99th annual meeting of the transportation research board. [ITS-Irvine record]

Theses and Dissertations

1. Arash Ghaffar (2025) Data-Driven Analysis of Shared Micromobility Ridership and Service Inequities. ProQuest Dissertations & Theses. Available at: https://uci.primo.exlibrisgroup.com/permalink/01CDL_IRV_INST/u4evf/cdi_proquest_journals_3201304468. [ITS-Irvine record]

Technical Reports

1. Tanjeeb Ahmed, Arash Ghaffar, Daisik Nam and Michael Hyland (2023) Transport Pricing Policies and Emerging Mobility Innovations. Research Report. UC ITS. Available at: https://doi.org/10.7922/g2xp737m.. [ITS-Irvine record]
2. Michael Hyland, Tanjeeb Ahmed, Navjyoth, JS Sarma, Suman Mitra and Arash Ghaffar (2020) Assessment of the Employment Accessibility Benefits of Shared Autonomous Mobility Services. Available at: https://escholarship.org/uc/item/66f9p1cm (Accessed: October 11, 2023). [ITS-Irvine record]

Policy Briefs

1. Arash Ghaffar, Jiangbo (Gabe) Yu and Michael Hyland (2025) Leveraging Robotaxis to Support Transit Riders in Emergencies. Policy Brief. UC ITS. Available at: https://doi.org/10.7922/g2qn654h. [ITS-Irvine record]
2. Arash Ghaffar, Jiangbo (Gabe) Yu and Michael F. Hyland (2025) Leveraging Robotaxis to Support Transit Riders in Emergencies. Policy Brief. Available at: https://escholarship.org/uc/item/7fc5750v (Accessed: September 16, 2025). [ITS-Irvine record]
3. Michael Hyland, Arash Ghaffar, Tanjeeb Ahmed and Daisik Nam (2024) Automated Vehicles and Transportation Network Companies Will Likely Impact the Efficacy of Transportation Pricing Strategies. Policy Brief. UC ITS. Available at: https://escholarship.org/uc/item/0b09t20w. [ITS-Irvine record]
4. Arash Ghaffar, Michael Hyland and Jean-Daniel Saphores (2023) What Drives Shared Micromobility Ridership?. Policy Brief. UC ITS. Available at: https://doi.org/10.7922/g2v40skk. [ITS-Irvine record]
5. Michael Hyland, Tanjeeb Ahmed, Navjyoth Sarma J S, Suman Mitra and Arash Ghaffar (2020) Shared Autonomous Mobility Services Show Promise for Increasing Access to Employment in Southern California. Policy Brief. Available at: https://escholarship.org/uc/item/79s7x09r (Accessed: October 11, 2023). [ITS-Irvine record]
6. Arash Ghaffar, Michael Hyland, Navjyoth Sarma, Suman Mitra and Tanjeeb Ahmed (2020) Shared Autonomous Mobility Services Show Promise for Increasing Access to Employment in Southern California. Policy Brief. UC ITS. Available at: https://doi.org/10.7922/g24f1p14. [ITS-Irvine record]

Preprints

1. Arash Ghaffar, Negin Shariat and Michael Hyland (2022) “Fleet Sizing for Robo-taxi Services: Comparing Novel and State-of-the-Art Scalable Modeling Approaches”. Rochester, NY: SSRN. Available at: 10.2139/ssrn.4168352. [ITS-Irvine record]