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Tiramisu [1] is a mobile app created by Carnegie Mellon for Android and iPhone that crowd-sources real-time estimated arrival times, bus fullness, and rider experience based on users of the mobile application [2] [3]. As a result, the application is able to provide real-time transit information for portions of the transit systems where users have the application active on their phone without requiring an AVL solution on the bus. When crowd-sourced real-time information isn’t available, Tiramisu shows the scheduled information from GTFS data or estimates based on historical arrival times or bus fullness. Tiramisu uses GTFS data as its data import format, but is currently available only in Pittsburg.


  1. Tiramisu Transit, LLC. "Tiramisu - The Real-time Bus Tracker." Accessed August 1, 2012 from http://www.tiramisutransit.com/
  2. Daisy Yoo, John Zimmerman, Aaron Steinfeld, and Anthony Tomasic, "Understanding the space for co-design in riders' interactions with a transit service," presented at the Proceedings of the 28th international conference on Human factors in computing systems, Atlanta, Georgia, USA, 2010.
  3. Aaron Steinfeld, John Zimmerman, Anthony Tomasic, Daisy Yoo, and Rafae Dar Aziz (2011), "Mobile Transit Rider Information via Universal Design and Crowdsourcing," in Transportation Research Board 90th Annual Meeting, Washington, DC, USA, p. 16, January 23-27, 2011. Accessed at: http://docs.trb.org/prp/11-3858.pdf