Projects by Topic

A spatiotemporal analysis of transit accessibility to low-wage jobs

This study presents a spatiotemporal analysis of transit accessibility to low-wage jobs and of the accessibility disparity between traveling by car and by public transit in Miami-Dade County, Florida. We find that drivers enjoy several times higher levels of accessibility to low-wage jobs than transit riders. The accessibility gap is smaller during peak hours and in the downtown Miami area, where auto accessibility is about three times that of transit accessibility; for most suburban and rural locations, auto accessibility is more than ten times higher than transit accessibility.

Key words: accessibility, public transit, transport equity, access disparity

Yan, X., Bejleri, I., Zhai, L. (2022). A spatiotemporal analysis of transit accessibility to low-wage jobs in Miami-Dade County. [Download Preprint]. Journal of Transport Geography, 98, 103218. https://doi.org/10.1016/j.jtrangeo.2021.103218

Understanding micromobility equity with open big data

We develop an analytical framework to examine how dockless e-scooter and station-based bikesharing differ regarding a set of equity-related outcomes (i.e., availability, accessibility, usage, and idle time) across neighborhoods in different socioeconomic categories. An analysis of idle time is made possible by the availability of the GBFS data, a new source of open big data. The analysis of idle time can shed light on if improving spatial access to shared micromobility vechicles in low-income communities can effectively promote micromobility use in these areas.

Key words: E-scooter, bikeshare, micromobility equity

Su, L., Yan, X., Zhao, X. Micromobility equity: A comparison of shared e-scooters and station-based bikeshare in Washington DC. [Download Preprint].

Mobility-on-demand vs fixed-route transit systems in low-income communities

Some transit observers envision future public transit to be integrated systems with fixed-route services running along major corridors and ridesourcing servicing lower-density areas. This paper evaluates traveler preferences for a proposed integrated transit system versus the existing fixed-route system, with a particular focus on disadvantaged travelers. Results from low-income communties in Detroit and Ypsilanti suggest that a majority of survey respondents preferred a MOD transit system over a fixed-route one. However, some women may have safety concerns, and low technology self-efficacy can be a more serious barrier for many people to adopt MOD transit.

Key words: mobility on demand, public transit, transport equity

Yan, X., Zhao, X., Han, Y., Van Hentenryck, P., Dillahunt, T. (2021). Mobility-on-demand versus fixed-route transit systems: An evaluation of traveler preferences in low-income communities. [Download Paper]. Transportation Research Part A: Policy and Practice, 148, 481-495. https://doi.org/10.1016/j.tra.2021.03.019