A supervised machine learning model for imputing missing boarding stops in smart card data

Research output: Contribution to journalArticlepeer-review

Abstract

Public transport has become an essential part of urban existence with increased population densities and environmental awareness. Large quantities of data are currently generated, allowing for more robust methods to understand travel behavior by harvesting smart card usage. However, public transport datasets suffer from data integrity problems; boarding stop information may be missing due to imperfect acquirement processes or inadequate reporting. This study introduces a supervised machine learning method to impute missing boarding stops based on ordinal classification using GTFS timetable, smart card, and geospatial datasets. A new metric, Pareto Accuracy, is suggested to evaluate algorithms where classes have an ordinal nature. The results are based on a case study in the city of Beer Sheva, Israel, consisting of one month of smart card data. We show that our proposed method is robust to irregular travelers and significantly outperforms well-known imputation methods without the need to mine any additional datasets. The data validation from another Israeli city using transfer learning shows the presented model is general and context-free. The implications for transportation planning and travel behavior research are further discussed.

Original languageEnglish
Pages (from-to)287-319
Number of pages33
JournalPublic Transport
Volume15
Issue number2
DOIs
StatePublished - 1 Jun 2023

Keywords

  • Boarding stop imputation
  • Machine learning
  • Missing data
  • Pareto accuracy
  • Public transport
  • Smart card

ASJC Scopus subject areas

  • Information Systems
  • Transportation
  • Mechanical Engineering
  • Management Science and Operations Research

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