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Title	Quantifying The Uncertainty Of Mobility Flow Predictions Using Gaussian Processes
ID_Doc	43942
Authors	Steentoft A.; Lee B.-S.; Schläpfer M.
Year	2024
Published	Transportation, 51, 6
DOI	http://dx.doi.org/10.1007/s11116-023-10406-z
Abstract	The ability to understand and predict the flows of people in cities is crucial for the planning of transportation systems and other urban infrastructures. Deep-learning approaches are powerful since they can capture non-linear relations between geographic features and the resulting mobility flow from a given origin location to a destination location. However, existing methods are not able to quantify the uncertainty of the predictions, which limits their interpretability and thus their use for practical applications in urban infrastructure planning. To that end, we propose a Bayesian deep-learning approach that formulates deep neural networks as Gaussian processes and integrates automatic variable selection. Our method provides uncertainty estimates for the predicted origin-destination flows while also allowing to identify the most important geographic features that drive the mobility patterns. The developed machine learning approach is applied to large-scale taxi trip data from New York City. © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2023.
Author Keywords	Bayesian deep learning; C45; Mobility; R41; Smart cities; Transportation system planning

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