Conformity Analysis of GTFS Routes and Bus Trajectories

  • Andreza Raquel M. Queiroz UFCG
  • Veruska B. Santos UFCG
  • Dimas C. Nascimento UFRPE
  • Carlos Eduardo S. Pires UFCG


General Transit Feed Specification (GTFS) is a standard data format generated by transportation agencies of most of the cities worldwide to provide scheduled data of their services. Despite being the standard in the public transportation field, applications that consume GTFS data may face two problems: outdated versions, since some transportation agencies do not provide GTFS in the same frequency that transit changes; and discrepancy with positioning data sent by the buses. This paper provides a conformity analysis of GTFS routes and bus positioning data from multiple cities. We have found inconsistencies related to GPS route labels and GTFS routes. We also classify the conformity of bus trajectories and enumerate the main inconsistencies found in data analysis.

Palavras-chave: GTFS, bus trajectories, GPS


Kubicka, M., Cela, A., Mounier, H., and Niculescu, S.-I. (2018). Comparative study and application-oriented classification of vehicular map-matching methods. IEEE Intelligent Transportation Systems Magazine. DOI: 10(2):150–166.

Newson, P. and Krumm, J. (2009). Hidden markov map matching through noise and sparseness. In Proceedings of the 17th ACM SIGSPATIAL international conference on advances in geographic information systems, pages 336–343. ACM. DOI:

Quddus, M. A., Ochieng, W. Y., and Noland, R. B. (2007). Current map-matching algorithms for transport applications: State-of-the art and future research directions. Transportation research part c: Emerging. DOI: technologies, 15(5):312–328.

Raymond, R. and Imamichi, T. (2016). Bus trajectory identification by map-matching. In 2016 23rd International Conference on Pattern Recognition (ICPR), pages 1618–1623. IEEE. DOI:

Wessel, N., Allen, J., and Farber, S. (2017). Constructing a routable retrospective transit timetable from a real-time vehicle location feed and gtfs. Journal of Transport Geography, 62:92–97. DOI:
QUEIROZ, Andreza Raquel M.; SANTOS, Veruska B.; NASCIMENTO, Dimas C.; PIRES, Carlos Eduardo S.. Conformity Analysis of GTFS Routes and Bus Trajectories. In: SIMPÓSIO BRASILEIRO DE BANCO DE DADOS (SBBD), 34. , 2019, Fortaleza. Anais [...]. Porto Alegre: Sociedade Brasileira de Computação, 2019 . p. 199-204. ISSN 2763-8979. DOI: