Selected publications

Realizable accessibility: evaluating the reliability of public transit accessibility using high-resolution real-time data

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?

The impacts of COVID-19 pandemic on public transit demand in the United States

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.

Does real-time transit information reduce waiting time? An empirical analysis

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.

Measuring risk of missing transfers in public transit systems using high-resolution schedule and real-time bus location data

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.

Assessing public transit performance using real-time data: spatiotemporal patterns of bus operation delays in Columbus, Ohio, USA

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.