Analyzing the variability of public transit accessibility estimates using GPS data

Authors

DOI:

https://doi.org/10.14295/transportes.v28i5.2175

Keywords:

Accessibility indicators. GTFS data. GPS data. Travel time variability.

Abstract

Accessibility is a key concept in transport and land use integrated planning. General Transit Feed Specification (GTFS) data have been successfully used in recent years as input to measure accessibility levels, but it is based on scheduled transit trips to estimate travel times between origin-destination pairs. On the other side, GPS data have been applied to update actual trip time tables, although with methodological and computational limitations, based on travel times’ measures of central tendency to reconstruct the GTFS file. Using one month of GPS bus data in Fortaleza, this work analyzed the variability of accessibility through empirical travel times, considering its dispersion. The results show that there is a significant variability in the estimation of the accessibility indicators, both in space and between work and school activities, possibly affecting the assessment of interventions on the transportation system.

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Author Biographies

Carlos Kauê Vieira Braga, Universidade Federal do Ceará

Programa de Pós-Graduação em Engenharia de Transportes.

Carlos Felipe Grangeiro Loureiro, Universidade Federal do Ceará

Programa de Pós-Graduação em Engenharia de Transportes.

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Published

2020-12-15

How to Cite

Braga, C. K. V., Loureiro, C. F. G., & Pereira, R. H. (2020). Analyzing the variability of public transit accessibility estimates using GPS data. Transportes, 28(5), 169–184. https://doi.org/10.14295/transportes.v28i5.2175

Issue

Vol. 28 No. 5 (2020)

Section

Articles

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