Interactions between two or more categories occur. For example, a car radio can be used as entertainment, but may also provide the driver with traffic information. The interactions between categories should be an important consideration during the further design and research on Advanced Driver Assistance Systems. The interface in particular should provide the user with means to safely use all three categories. This research will primarily focus on the safety systems. Incar active safety systems are generally called Advanced Driver Assistance Systems, or ADAS. ADAS are in turn part of a technology called Intelligent Transportation Systems, or ITS. A clear definition of ADAS is stated as follows. ADAS: Advanced Driver Assistance Systems have a direct supporting interaction with the driver or the driver task. Their way of support may vary from informative to controlling. ADAS operate from inside the car, but may be connected to external sources. .
