The DOI matches its Crossref record; 34 of the 34 references it cites were found in a registry or an index.
Identifying Active Travel Behaviors in Challenging Environments Using GPS, Accelerometers, and Machine Learning Algorithms
Open accessAbstract
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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“For instance, research has shown that an accelerometer installed on smartphones is accurate for tracking step count [9] and that GPS signals can be used to estimate activity levels [87].”
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Metadata
- 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
- Publisher
- Frontiers Media SA
- Published
- 2014-04-22
- Volume
- 2
- Pages
- 36-36
- ISSN
- 2296-2565 (ISSN-L)
- PMC
- PMC4001067
- 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
- gold
- doi.org
- 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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