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Scaling Law of Urban Ride Sharing

Author(s)
Tachet des Combes, Remi; Santi, Paolo; Szell, Michael; Ratti, Carlo; Sagarra. Oleguer
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Abstract
Sharing rides could drastically improve the efficiency of car and taxi transportation. Unleashing such potential, however, requires understanding how urban parameters affect the fraction of individual trips that can be shared, a quantity that we call shareability. Using data on millions of taxi trips in New York City, San Francisco, Singapore, and Vienna, we compute the shareability curves for each city, and find that a natural rescaling collapses them onto a single, universal curve. We explain this scaling law theoretically with a simple model that predicts the potential for ride sharing in any city, using a few basic urban quantities and no adjustable parameters. Accurate extrapolations of this type will help planners, transportation companies, and society at large to shape a sustainable path for urban growth.
Date issued
2017-01
URI
http://hdl.handle.net/1721.1/110085
Department
Massachusetts Institute of Technology. SENSEable City Laboratory
Journal
Scientific Reports
Publisher
Nature Publishing Group
Citation
Tachet, R.; Sagarra, O.; Santi, P.; Resta, G.; Szell, M.; Strogatz, S. H. and Ratti, C. “Scaling Law of Urban Ride Sharing.” Scientific Reports 7 (March 2017): 42868 © 2017 The Authors
Version: Final published version
ISSN
2045-2322

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