How Smart is Your Smart Card?

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Talk slides @ ACM Ubicomp 2011, 21/09/2011, Beijing, China

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How Smart is Your Smart Card?

  1. 1. @neal_lathiadept. of computer scienceuniversity college londonubicomp 2011
  2. 2. @neal_lathiadept. of computer scienceuniversity college londonubicomp 2011
  3. 3. the oyster carda sensor carried by Londoners
  4. 4. the oyster cardbeyond payment?a sensor for science?
  5. 5. how smart is your smart card?measuring travel behaviours, perceptions, and incentives
  6. 6. data vs. behaviour & perception
  7. 7. perception:+ 25 question surveydata:+ respondent oyster historyreference data:+ 5%, 2 x 83-day sample+ 100%, 1-month sample
  8. 8. trips taken data perception
  9. 9. travel time proportion time bin
  10. 10. perceived/data payment paymentuser
  11. 11. perceived/data payment paymentuser
  12. 12. payment vs. reference compared to 3,379,570 transactions (5% data set): 49.8% of transactions should fall into this category.
  13. 13. data vs. behaviour & perception+ estimating travel time > estimating travel needs+ users inaccurately estimate payments+ high usage of modalities that are “never used”+ high proportion of travel to “non typical” stations
  14. 14. the oyster cardbeyond payment?a sensor for science?future ubicomp applications?
  15. 15. data vs. travel incentives
  16. 16. mobility vs. student discounts184,923 students10,723,472 student trips48,888,268 non-student trips
  17. 17. mobility vs. student discounts
  18. 18. mobility vs. student discounts“... as a student with a flexibletimetable, it isnt always obviouswhether a travel card is a better dealthan pay as you go...”
  19. 19. mobility vs. daily capping91,391,155 pay as you go tripssplit into capped vs. non-capped (free) (non-free)
  20. 20. mobility vs. daily cappingnot-free: 54.83% trips by busfree: 73.53% trips by bus
  21. 21. the oyster carda tool to evaluate policy?a sensor to test incentives?
  22. 22. N. Lathia, J. Froehlich, L. Capra. Mining Public TransportUsage for Personalised Intelligent Transport Systems. InIEEE ICDM 2010, Sydney, Australia, December 2010.N. Lathia, L. Capra. Mining Mobility Data to MinimiseTravellers Spending on Public Transport. In ACM KDD 2011,San Diego, USA, August 2011.
  23. 23. how smart is your smart card?measuring travel behaviours, perceptions, and incentives @neal_lathia dept. of computer science university college london ubicomp 2011

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