Abstract: Vehicles in transit within a location may transmit and/or receive information about transit events arising within the location, such as accidents, developing weather, and road obstructions. Because localized exchange channels, such as a radiofrequency broadcast, may be range-limited and/or unreliable, a centralized service may be provided to facilitate the exchange of notifications about transit events, but it may be difficult to provide a centralized service that is both scalable to millions of vehicles and capable of low-latency exchange of time-sensitive notifications for transit events. The techniques presented herein provide an architecture for broadcasting transit events through a transit service that maintains vehicle area groups, respectively identifying the vehicles that are associated with each location.

Abstract: Techniques and systems for selecting one or more advertisements to target (e.g., send to, display to, etc.) a user are disclosed wherein the interests of the user are inferred based on current behaviors of social media. Social media is collected and categorized according to some predetermined criteria, such as keywords or outlinks in a post. As a function of the social media collected, current topics in the social media are identified and an advertisement, or advertisements, relating to the current topics is selected. Current topics may be those topics that are more popular, for example, in the social media at the instant a user enters an ad-enabled site.