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Representativeness of Taxi GPS-Enabled Travel Time Data Using Gamma Generalized Linear Model

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  • Glykeria Myrovali

    (Centre for Research and Technology Hellas, Hellenic Institute of Transport (CERTH/HIT), Greece)

  • Theodoros Karakasidis

    (Physics Department, University of Thessaly, Greece)

  • Maria Morfoulaki

    (Centre for Research and Technology Hellas, Hellenic Institute of Transport (CERTH/HIT), Greece)

  • Georgia Ayfantopoulou

    (Centre for Research and Technology Hellas, Hellenic Institute of Transport (CERTH/HIT), Greece)

Abstract

The sensor-era has brought rapid changes in transportation; the abundance of data has started changing the traditional way in which planners and engineers approach mobility. Nowadays, traffic monitoring and information provision systems heavily rely on floating car data usually of special vehicles (e.g., trucks, taxi), and the question that arises is whether such sources can provide reliable data for the whole traffic in a complex urban environment. The current paper, through Thessaloniki's (GR) case study, seeks to evaluate the reliability of taxi data compared to the overall traffic. The analysis reveals that for the examined critical urban road paths, there is a strong relation among floating taxi data with the overall traffic that is additionally influenced by other significant factors (e.g., number of lanes, day, time period). Furthermore, a modelling approach with a generalized linear model (gamma with log link) seems appropriate when dealing with skewed and heteroscedastic traffic data.

Suggested Citation

  • Glykeria Myrovali & Theodoros Karakasidis & Maria Morfoulaki & Georgia Ayfantopoulou, 2021. "Representativeness of Taxi GPS-Enabled Travel Time Data Using Gamma Generalized Linear Model," International Journal of Decision Support System Technology (IJDSST), IGI Global, vol. 13(3), pages 1-18, July.
    • Handle: RePEc:igg:jdsst0:v:13:y:2021:i:3:p:1-18
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    References listed on IDEAS

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    2. Koenker, Roger, 1981. "A note on studentizing a test for heteroscedasticity," Journal of Econometrics, Elsevier, vol. 17(1), pages 107-112, September.
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