Cited by 123Context-Aware Activity Recognition SystemsUrban Transport and AccessibilityHuman Mobility and Location-Based Analysis

Identifying Active Travel Behaviors in Challenging Environments Using GPS, Accelerometers, and Machine Learning Algorithms

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Ellis, Katherine, Godbole, Suneeta, Marshall, Simon, Lanckriet, Gert, Staudenmayer, John, Kerr, Jacqueline·2014·Frontiers in Public Health

Abstract

BACKGROUND: Active travel is an important area in physical activity research, but objective measurement of active travel is still difficult. Automated methods to measure travel behaviors will improve research in this area. In this paper, we present a supervised machine learning method for transportation mode prediction from global positioning system (GPS) and accelerometer data. METHODS: We collected a dataset of about 150 h of GPS and accelerometer data from two research assistants following a protocol of prescribed trips consisting of five activities: bicycling, riding in a vehicle, walking, sitting, and standing. We extracted 49 features from 1-min windows of this data. We compared the performance of several machine learning algorithms and chose a random forest algorithm to classify the transportation mode. We used a moving average output filter to smooth the output predictions over time. RESULTS: The random forest algorithm achieved 89.8% cross-validated accuracy on this dataset. Adding the moving average filter to smooth output predictions increased the cross-validated accuracy to 91.9%. CONCLUSION: Machine learning methods are a viable approach for automating measurement of active travel, particularly for measuring travel activities that traditional accelerometer data processing methods misclassify, such as bicycling and vehicle travel.

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Authors
Ellis, K., Godbole, S., Marshall, S., Lanckriet, G., Staudenmayer, J., & Kerr, J.
Affiliations
  • University of California San Diego (US)
  • University of Massachusetts Amherst (US)
Corresponding author
Ellis, Katherine
Venue
Frontiers in Public Health
Published
2014-04-22
Volume
2
Pages
36-36
ISSN
2296-2565 (ISSN-L)
OpenAlex
W2134430874
Cited by
123
References
34
Citations by year
2025: 5 · 2024: 8 · 2023: 7 · 2022: 6 · 2021: 12 · 2020: 18 · 2019: 8 · 2018: 18 · 2017: 12 · 2016: 13 · 2015: 10 · 2014: 5
FWCI
11.87
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Frontiers in Public Health (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • University of California, San Diego
  • National Cancer Institute (R01CA164993, U01CA130771, U54CA155435)
Topics
  • Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Context-Aware Activity Recognition Systems
  • Social Sciences › Transportation › Urban Transport and Accessibility
  • Social Sciences › Transportation › Human Mobility and Location-Based Analysis
Keywords
active travel, GPS data, accelerometer data, cycling, walking, vehicle travel, physical activity measurement, random forest, moving average smoothing

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