The modern passenger vehicle contains numerous sources of information. In one sense, all of the messages sent from in-vehicle devices are attractive, at least from the viewpoint of the designer who has incorporated them into the vehicle to make driving more pleasurable and safer. Yet in another sense, these same messages can present distractions to the driver resulting in diminished driving pleasure and possibly unsafe vehicle control. Thus, a message that at one moment might be attractive and useful to the driver, at a different moment, especially one where attention must be focused outside the vehicle, becomes an unwanted distraction. This paper reviews three sources of in-vehicle information: advanced traveler information systems, safety and collision avoidance systems, and convenience and entertainment systems. A framework for integrating these sub-systems is outlined based upon human-centered design principles and functional characteristics of systems.