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Sensors 2017, 17(9), 2058;

Methods for Real-Time Prediction of the Mode of Travel Using Smartphone-Based GPS and Accelerometer Data

Department of Statistics, University of Washington, Box 354322, Seattle, WA 98195-4322, USA
Department of Mathematics, Statistics, and Computer Science, Macalester College, St. Paul, MN 55105-1899, USA
Division of Biostatistics, School of Public Health, University of Minnesota, Minneapolis, MN 55455-0341, USA
Department of Information and Decision Sciences, Carlson School of Management, University of Minnesota, Minneapolis, MN 55455-0438, USA
Humphrey School of Public Affairs, University of Minnesota, MN 55455-0395, USA
Author to whom correspondence should be addressed.
Received: 29 June 2017 / Revised: 29 August 2017 / Accepted: 5 September 2017 / Published: 8 September 2017
(This article belongs to the Section Physical Sensors)
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We propose and compare combinations of several methods for classifying transportation activity data from smartphone GPS and accelerometer sensors. We have two main objectives. First, we aim to classify our data as accurately as possible. Second, we aim to reduce the dimensionality of the data as much as possible in order to reduce the computational burden of the classification. We combine dimension reduction and classification algorithms and compare them with a metric that balances accuracy and dimensionality. In doing so, we develop a classification algorithm that accurately classifies five different modes of transportation (i.e., walking, biking, car, bus and rail) while being computationally simple enough to run on a typical smartphone. Further, we use data that required no behavioral changes from the smartphone users to collect. Our best classification model uses the random forest algorithm to achieve 96.8% accuracy. View Full-Text
Keywords: mode prediction; movelets; dimension reduction; classification mode prediction; movelets; dimension reduction; classification

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Martin, B.D.; Addona, V.; Wolfson, J.; Adomavicius, G.; Fan, Y. Methods for Real-Time Prediction of the Mode of Travel Using Smartphone-Based GPS and Accelerometer Data. Sensors 2017, 17, 2058.

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