A computing system is described that can provide a user with alerts based on traffic information related to the user's expected travel route. In some embodiments, a user can be alerted if a traffic delay exists on the user's expected travel route. In other embodiments, a user can be alerted when their usual bus or train is delayed. In further embodiments, a user can be alerted when traffic on an expected route to the user's next event location might impact the user's ability to arrive at that location on time.