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Activity Number:
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614
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Type:
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Contributed
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Date/Time:
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Wednesday, August 3, 2016 : 2:00 PM to 3:50 PM
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Sponsor:
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Transportation Statistics Interest Group
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Abstract #321093
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View Presentation
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Title:
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Spatio-Temporal Analysis of Accessibility in Public Transit Systems
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Author(s):
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John Handley* and Lina Fu and Laura Tupper
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Companies:
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PARC, A Xerox Company and PARC, A Xerox Company and Cornell University
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Keywords:
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mobility ;
smart cities ;
spatial statistics ;
urban analytics
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Abstract:
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Owing to increased urbanization and concern about climate change, public transit is growing in importance as a means of urban mobility. We propose and analyze a comprehensive accessibility measure to characterize the ability of a public transit system to reach its potential ridership. It measures the area or population reachable from a given point within a certain time budget and at a given starting time. It incorporates the difference between scheduled and actual accessibility, the latter being a function of the system's quality of service. We demonstrate the measure in two modeling efforts. An areal model ties aggregate ridership, population and number of workers to average accessibility across transportation analysis zones. The fitted model shows average accessibility within a zone is a significant predictor of bus ridership. Accessibility at a given bus stop varies by time. We introduce a spatio-temporal model for point referenced time series to assess the impact significant network and schedule changes. We demonstrate these two models using a two-year retrospective data set spanning a major overhaul of a public transit system in a mid-sized American city.
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Authors who are presenting talks have a * after their name.
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