Published in Transportation Research Part D: Transport and Environment, 2026
Shaver, H., Liu, L., Ahmed, N., Long, J. A., Voogt, J. A., Diab, E., Wang, J., & Lee, J. (2026). Measuring transit riders’ heat exposure and mitigation during the 2021 Vancouver heatwave. Transportation Research Part D: Transport and Environment, 157, 105398.
Published in Transportation Research Part D: Transport and Environment, 2026
Recalde, A., Liu, L., Zhang, X., Park, S., Jiang, S., & Zhao, X. (2026). Evacuation destination choices during Hurricane Ian: A direct demand modeling approach. Transportation Research Part D: Transport and Environment, 156, 105384.
Published in Transportation Research Part D: Transport and Environment, 2025
Liu, L., Zhang, X., Jiang, S., & Zhao, X. (2025). Hurricane evacuation analysis with large-scale mobile device location data during Hurricane Ian. Transportation Research Part D: Transport and Environment, 139, 104559.
Published in Transportation Research Part D: Transport and Environment, 2025
Qian, Y., Liu, L., & Yan, X. (2025). Big Data, Big Bias? On Factors Influencing Public Transit and Shared Micromobility Integration. Transportation Research Part D: Transport and Environment, 148, 104977.
Published in Health & Place, 2025
Lyu, D., Liu, L., Campbell, C., Zhang, Y., & Yan, X. (2025). Potentials and limitations of large-scale, individual-level mobile location data for food acquisition analysis. Health & Place, 95, 103526.
Published in Journal of Transport Geography, 2025
Liu, L., Li, X., Pereira, R. H., & Yan, X. (2025). Measuring exposure to extreme heat in public transit systems. Journal of Transport Geography, 128, 104383.
Published in Travel Behaviour and Society, 2025
Javanmard, R., Liu, L., Long, J. A., & Lee, J. (2025). Using Realtime GTFS to generate easy-to-use transit accessibility measures under travel time uncertainty. Travel Behaviour and Society, 41, 101054.
Published in Transportation Research Interdisciplinary Perspectives, 2025
Tokey, A. I., Liu, L., & Miller, H. J. (2025). Measuring the impacts of sidewalks on public transit first mile/last mile accessibility and their association with social and demographic factors. Transportation Research Interdisciplinary Perspectives, 33, 101576.
Published in Computers, Environment and Urban Systems, 2025
Dai, Y., Liu, L., Wang, K., Li, M., & Yan, X. (2025). Using computer vision and street view images to assess bus stop amenities. Computers, Environment and Urban Systems, 117, 102254.
Published in Environment and Planning B: Urban Analytics and City Science, 2025
Liu, L., & Miller, H. J. (2025). Accessibility derivative: measuring the accessibility contribution of public transit routes. Environment and Planning B: Urban Analytics and City Science, 23998083241272098.
Published in Urban Human Mobility: Practices, Analytics, and Strategies for Smart Cities, 2025
Liu, L., & Miller, H. J. (2025). Measuring Resilience with Public High-Transit Resolution Real-Time Geospatial Data. Urban Human Mobility: Practices, Analytics, and Strategies for Smart Cities, 283.
Published in International Encyclopedia of Geography, 2025
Liu, L. (2025). Impacts of COVID-19 on Passenger Transportation. International Encyclopedia of Geography.
Published in International Encyclopedia of Geography, 2025
Liu, L. (2025). General Transit Feed Specification. International Encyclopedia of Geography.
Published in Computers, Environment and Urban Systems, 2024
Liu, L., Lee, J., & Miller, H. J. (2024). Evaluating accessibility benefits and ridership of bike-transit integration through a social equity lens. Computers, Environment and Urban Systems, 112, 102150.
Published in Computers, Environment and Urban Systems, 2024
Ahmed, N., Lee, J., Liu, L., Kim, J., Jang, K. M., & Wang, J. (2024). The cost of climate change: A generalized cost function approach for incorporating extreme weather exposure into public transit accessibility. Computers, Environment and Urban Systems, 112, 102145.
Published in Journal of Transport Geography, 2024
Football games can disrupt public transit; not just near the stadium, but everywhere all at once.
Published in Journal of Transport Geography, 2023
Javanmard, R., Lee, J., Kim, J., Liu, L., & Diab, E. (2023). The impacts of the modifiable areal unit problem (MAUP) on social equity analysis of public transit reliability. Journal of Transport Geography, 106, 103500.
Published in Journal of Transport Geography, 2023
Public transit is criminally unfair for people with mobility disability.
Published in Computers, Environment and Urban Systems, 2022
Scooters can help you travel better in a public transit system; Well, if you are in the right place… and you have money… and you do not bring too many friends with you…
Published in Journal of Geographical Systems, 2022
Accessibility is unrealiable. How to build a realizable and human-centric accessibility measure for transit users that cannot outrun buses and predict the future?
Published in PLOS ONE, 2020
COVID quarantine is bad, but having to transit during COVID is worse. We used smartphone data to measure the dynamics and dimensions of COVID-19 related transit demand decline from Feb to May 2020.
Published in Transportation Research Part A: Policy and Practice, 2020
Revisiting the benefit of RTI on the wait time of different users and the answer is surprising. No, RTI does not always help people.
Published in Urban Studies, 2020
Hate transfer? This paper introduced a systematic method to measure the risk of missing transfers with GTFS real-time data; in other words, how bad you should hate transfers.
Published in International Journal of Geographical Information Science, 2020
Delay is a primary indicator of transit and we used GTFS to measure that. It changed, a lot.