Abstract: Systems and methods of detecting traffic light signal changes are disclosed. For instance, it can be determined that a user is stopped at an intersection having a traffic light. A plurality of images can be captured in response to detecting that the user is stopped at the intersection having a traffic light. The plurality of images do not depict the traffic light. A tonal shift in one or more color values associated with at least one image of the plurality of images can be detected. The tonal shift is indicative of a change in signal provided by the traffic light. A notification indicative of the change in signal provided by the traffic light can be provided to the user.

Abstract: Systems and methods of detecting traffic light signal changes are disclosed. For instance, it can be determined that a user is stopped at an intersection having a traffic light. A plurality of images can be captured in response to detecting that the user is stopped at the intersection having a traffic light. The plurality of images do not depict the traffic light. A tonal shift in one or more color values associated with at least one image of the plurality of images can be detected. The tonal shift is indicative of a change in signal provided by the traffic light. A notification indicative of the change in signal provided by the traffic light can be provided to the user.

Abstract: According to one aspect, the subject matter described herein includes a method for dynamically selecting questions to be presented in a survey. The method includes providing for assignment of priorities to potential survey questions. The method further includes determining a selection probability for each question based on the assigned priorities. The method further includes storing questions in a database embodied in a non-transitory computer readable medium. The method further includes dynamically selecting, from the database and based on the selection probabilities, questions to be included in surveys to be presented to a plurality of individuals such that different individuals are presented with different sets of questions.

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.