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Traffic Speed Data Investigation with Hierarchical Modeling

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Future Data and Security Engineering (FDSE 2015)

Part of the book series: Lecture Notes in Computer Science ((LNISA,volume 9446))

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Abstract

This paper presents a novel topic model for traffic speed analysis in the urban environment. Our topic model is special in that the parameters for encoding the following two domain-specific aspects of traffic speeds are introduced. First, traffic speeds are measured by the sensors each having a fixed location. Therefore, it is likely that similar measurements will be given by the sensors located close to each other. Second, traffic speeds show a 24-hour periodicity. Therefore, it is likely that similar measurements will be given at the same time point on different days. We model these two aspects with Gaussian process priors and make topic probabilities location- and time-dependent. In this manner, our model utilizes the metadata of the traffic speed data. We offer a slice sampling to achieve less approximation than variational Bayesian inferences. We present an experimental result where we use the traffic speed data provided by New York City.

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Author information

Authors and Affiliations

  1. Nagasaki University, 1-14 Bunkyo-machi, Nagasaki, 8528521, Japan

    Tomonari Masada

  2. National Institute of Informatics, 2-1-2 Hitotsubashi, Chiyoda-ku, Tokyo, 1018430, Japan

    Atsuhiro Takasu

Authors
  1. Tomonari Masada
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  2. Atsuhiro Takasu
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Corresponding author

Correspondence to Tomonari Masada .

Editor information

Editors and Affiliations

  1. Ho Chi Minh City University of Technology, Ho Chi Minh City, Vietnam

    Tran Khanh Dang

  2. Johannes Kepler University Linz, Linz, Austria

    Roland Wagner

  3. Johannes Kepler University Linz, Linz, Austria

    Josef Küng

  4. Ho Chi Minh City University of Technology, Ho Chi Minh City, Vietnam

    Nam Thoai

  5. Hosei University, Tokyo, Japan

    Makoto Takizawa

  6. University of Vienna, Vienna, Austria

    Erich Neuhold

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Masada, T., Takasu, A. (2015). Traffic Speed Data Investigation with Hierarchical Modeling. In: Dang, T., Wagner, R., Küng, J., Thoai, N., Takizawa, M., Neuhold, E. (eds) Future Data and Security Engineering. FDSE 2015. Lecture Notes in Computer Science(), vol 9446. Springer, Cham. https://doi.org/10.1007/978-3-319-26135-5_10

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  • DOI: https://doi.org/10.1007/978-3-319-26135-5_10

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-26134-8

  • Online ISBN: 978-3-319-26135-5

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