Research

Broadly, my research interests focus on urban mobility (PhD work) and multimodal transportation accessibility and equity (undergraduate work).

Focus 1: Urban mobility

Systems design (PhD)

[W1]. Microtransit design: fixed-line transit, on-demand mobility, or both?
-Presented at the 2024 INFORMS Annual Meeting (October 2024, Seattle WA, USA).
-Presented at the MIT ORC Student Seminar (October 2024, Cambridge MA, USA).

Urban bikeshare planning (undergrad)

[J1]. Davidson, J., Nam, S.J., Karam, S., Koroma, F.K., Kim, E.M., Ryerson, M.S. (2022). New Equity Inputs to Prioritize Bikeshare Infrastructure Allocation: Learning from the Covid-19 Period. Transportation Research Record.
(DOI), (PDF)
-Presented at the 2022 Transportation Research Board Annual Meeting Bicycle Committee Meeting (January 2022, Washington DC, USA).

[W2]. Davidson, J., Nam, S.J., Karam, S., Ryerson, M.S. Cycling in a crisis: Employing quasi-experimental designs to estimate the effects of provisional bicycle infrastructure. Journal of Planning Education and Research (Under Revision).
-Presented at the 2024 Transportation Research Board Annual Meeting (January 2024, Washington DC, USA).

Focus 2: Multimodal transportation accessibility and equity (undergrad)

[J2]. Karam, S., Ryerson, M.S., Kim, A.M., Li, M.Z. (2024). Autonomous Vehicle Impacts on Airport Leakage with Demand Forecasting and Environment Implications. Transportation Research Part D: Transport and Environment.
(DOI), (PDF)
-Presented at the 2024 Transportation Research Board Annual Meeting Aviation Economics and Forecasting Committee Meeting (January 2024, Washington DC, USA).
-Presented at the 2023 INFORMS Annual Meeting (October 2023, Phoeniz AZ, USA).
-Presented at the INFORMS Transportation Science and Logistics Society Conference (July 2023, Chicago IL, USA).
-Presented at the 4th Symposium on Aviation Research (March 2023, Toulouse, France).

[J3]. Karam, S., Nam, S.J., Ryerson, M.S. (2022). AIMing for Equity in Measuring Aviation Accessibility: Development of the Aviation-accessibility Integrated Mobility (AIM) Metric. Transportation Research Record.
(DOI), (PDF)
-Presented at the 2023 Transportation Research Board Annual Meeting Eisenhower Fellowship Research Showcase (January 2023, Washington DC, USA).
-Presented at the 10th International Conference on Research in Air Transportation (June 2022, Tampa FL, USA).
-Presented at the 2022 Transportation Research Board Annual Meeting Airport Terminals and Ground Access Committee Meeting (January 2022, Washington DC, USA).

[J4]. Karam, S. and Ryerson, M.S. (2023). Operating at the Individual Level: A review of literature and a research agenda to support needs-forward models of transport resource allocation. Transportation Research Interdisciplinary Perspectives.
(DOI), (PDF)

[C1]. Karam, S., Shanos, L., Ford, J., Castaneda, L., Ryerson, M.S., Vohra, R. (2023). The Development of the Reproductive Healthcare Equity Algorithm (RHEA). Andrew P. Sage Memorial Capstone Competition.
(arXiv), (PDF), (2-min trailer) (6-min demo)
-Presented at the Laboratory for Air Transportation, Infrastructure, and Connected Environments at the University of Michigan (October 2024).
-Presented at the Women’s Transportation Seminar International Annual Conference (May 2023, Atlanta GA, USA).
-Presented at the Andrew P. Sage Memorial Capstone Competition (April 2023, Fairfax VA, USA) Honorable Mention for Best Paper in Systems Design Track.