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Constructing a routable retrospective transit timetable from a real-time vehicle location feed and GTFS

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  • Wessel, Nate
  • Allen, Jeff
  • Farber, Steven

Abstract

We describe a method for retroactively improving the accuracy of a General Transit Feed Specification (GTFS) package by using a real-time vehicle location data set provided by the transit agency. Once modified, the GTFS package contains the observed rather than the scheduled transit operations and can be used in research assessing network performance, reliability and accessibility. We offer a case study using data from the Toronto Transit Commission and find that substantial aggregate accessibility differences exist between scheduled and observed services. This ‘error’ in the scheduled GTFS data may have implications for many types of measurements commonly derived from GTFS data.

Suggested Citation

  • Wessel, Nate & Allen, Jeff & Farber, Steven, 2017. "Constructing a routable retrospective transit timetable from a real-time vehicle location feed and GTFS," Journal of Transport Geography, Elsevier, vol. 62(C), pages 92-97.
    • Handle: RePEc:eee:jotrge:v:62:y:2017:i:c:p:92-97
    DOI: 10.1016/j.jtrangeo.2017.04.012
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    1. Ahmed El-Geneidy & Ron Buliung & Ehab Diab & Dea van Lierop & Myriam Langlois & Alexander Legrain, 2016. "Non-stop equity: Assessing daily intersections between transit accessibility and social disparity across the Greater Toronto and Hamilton Area (GTHA)," Environment and Planning B, , vol. 43(3), pages 540-560, May.
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    4. Fransen, Koos & Neutens, Tijs & Farber, Steven & De Maeyer, Philippe & Deruyter, Greet & Witlox, Frank, 2015. "Identifying public transport gaps using time-dependent accessibility levels," Journal of Transport Geography, Elsevier, vol. 48(C), pages 176-187.
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    1. Zhang, Guozheng & Wang, Dianhai & Cai, Zhengyi & Zeng, Jiaqi, 2024. "Competitiveness of public transit considering travel time reliability: A case study for commuter trips in Hangzhou, China," Journal of Transport Geography, Elsevier, vol. 114(C).
    2. Mayaud, Jerome & Tran, Martino & Pereira, Rafael Henrique Moreas & Nuttall, Rohan, 2018. "Future access to essential services in a growing smart city: The case of Surrey, British Columbia," SocArXiv pej8u, Center for Open Science.
    3. Braga, Carlos Kaue V. & Loureiro, Carlos Felipe Grangeiro & Pereira, Rafael H.M., 2023. "Evaluating the impact of public transport travel time inaccuracy and variability on socio-spatial inequalities in accessibility," Journal of Transport Geography, Elsevier, vol. 109(C).
    4. Lee, Jinhyung & Miller, Harvey J., 2020. "Robust accessibility: Measuring accessibility based on travelers' heterogeneous strategies for managing travel time uncertainty," Journal of Transport Geography, Elsevier, vol. 86(C).
    5. Javanmard, Reyhane & Lee, Jinhyung & Kim, Kyusik & Park, Jinwoo & Diab, Ehab, 2024. "Evaluating the impacts of supply-demand dynamics and distance decay effects on public transit project assessment: A study of healthcare accessibility and inequalities," Journal of Transport Geography, Elsevier, vol. 116(C).
    6. Stępniak, Marcin & Pritchard, John P. & Geurs, Karst T. & Goliszek, Sławomir, 2019. "The impact of temporal resolution on public transport accessibility measurement: Review and case study in Poland," Journal of Transport Geography, Elsevier, vol. 75(C), pages 8-24.
    7. Liu, Luyu & Porr, Adam & Miller, Harvey J., 2024. "Measuring the impacts of disruptions on public transit accessibility and reliability," Journal of Transport Geography, Elsevier, vol. 114(C).
    8. Nichols, Aaron & Ryan, Jean & Palmqvist, Carl-William, 2024. "The importance of recurring public transport delays for accessibility and mode choice," Journal of Transport Geography, Elsevier, vol. 115(C).
    9. Allen, Jeff & Farber, Steven, 2019. "Sizing up transport poverty: A national scale accounting of low-income households suffering from inaccessibility in Canada, and what to do about it," Transport Policy, Elsevier, vol. 74(C), pages 214-223.
    10. Klar, Ben & Lee, Jinhyung & Long, Jed A. & Diab, Ehab, 2023. "The impacts of accessibility measure choice on public transit project evaluation: A comparative study of cumulative, gravity-based, and hybrid approaches," Journal of Transport Geography, Elsevier, vol. 106(C).
    11. Mayaud, Jerome & Anderson, Sam & Tran, Martino & Radic, Valentina, 2018. "Insights from self-organizing maps for predicting accessibility demand for healthcare infrastructure," SocArXiv yngx4, Center for Open Science.

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