Cross-Regional Comparison of Transit-Based Accessibility Using Simulated Individual Trips

Authors: Ruihong Huang*, Northern Arizona University
Topics: Transportation Geography, Geographic Information Science and Systems, Urban and Regional Planning
Keywords: Transit, Accessibility, GIS, Simulation, Urban
Session Type: Paper
Day: 4/7/2019
Start / End Time: 9:55 AM / 11:35 AM
Room: Marriott Ballroom Salon 1, Marriott, Lobby Level
Presentation File: No File Uploaded


To study the accessibility provided by transit systems, individual trip data is desired in order to fully take into account factors of accessibility including land use, the transportation system, individuals’ mobility and restrictions, as well as time. Since individual trip data are difficult and expensive to collect, limited number of studies were often restricted to small case areas, while large scale and cross-regional studies were prohibited. This paper presents a cross-regional a study of transit-based accessibility in two cities of similar size but significantly different in other aspects: Milwaukee, WI in the Midwest and Tucson, AZ in the Southwest. The study uses simulated individual work trips based on publicly available data sets including census data and General Transit Feed Specification (GTFS). More than 27,000 and more than 10,000 transit-dependent worker agents are simulated for Milwaukee and Tucson respectively. 13 home to workplace trips between 6:00 and 9:00 and 17 workplace to home trips between 15:00 and 20:00 are computed for each worker agent. Accessibility indexes derived from the simulated individual work trips show significantly different spatial patterns in accessibility, which are related to urban spatial structure and population structures.

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