Abstract: This specification describes technologies relating to virtual reality applications. In general, one aspect of the subject matter described in this specification can be embodied in methods that include detecting, by circuitry included in a ticket carrier for carrying a public transportation system access ticket, an interaction between the ticket and an access point of the public transportation system at a first time point. The method also includes storing, on a storage device, a record of the interaction, and providing to a computing device, the stored record at a second time point different from the first time point. The executed operations of the computing device produce a virtual environment that partially represents the public transportation system and position a character within the virtual environment based upon the stored record. Other embodiments of this aspect include corresponding systems, apparatus, and computer program products.