Deficiencies in Public Transit Accessibility of Healthcare Facilities in Chicago
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2020-09-01
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Abstract:Public transportation has the potential to impact the accessibility of individuals to healthcare facilities and affect the quality of life and the livability of a community. It is critical, therefore, to understand the service efficiency of public transportation as a mode of access to healthcare facilities. In this study, the authors develop performance measures/indices that will reflect on both the supply (availability) and the demand side (accessibility). The indices are then applied in the Chicago area. While there are different indicators for measuring availability, for the purposes of this research the authors focus on three indicators - the frequency of service, hours of service, and the service coverage. These measures are aggregated into an index for transit availability. The index is a measurement of the percent of person-minutes served. For a given geographic area, the index multiplies the percent of area served by transit by the percent of an hour that a station or stop is served (assuming a five-minute wait time) by the percent of a day that the area is served by transit. The index range is between zero and one for each census block group. The public transit accessibility serves as a proxy for the travel demand at (or near) the locations of healthcare facilities using public transit. Among the several approaches to measuring transportation accessibility this research uses the generalized gravity model framework with public data in the Chicago region to develop a public transit accessibility index. The index measures the aggregate peak-period public transit accessibility potential to the locations of healthcare facilities for each residential zone in the Chicago area.
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