Adaptive Cruise Control (ACC) is an intelligent development of cruise control. The ACC system not only maintains a speed set by the driver but also adapts the speed to the traffic situation ahead by braking and accelerating within the system limits. The latest generation of ACC as fitted to the first models also takes into consideration speed limits and the route which is driven. For this purpose, ACC uses a radar sensor, a camera and the navigation system data. Via the camera and the linked traffic sign detection system, the car can “see” speed limits and the edges of built-up areas. At the same time, the car calculates its position using the navigation system route data and adapts the speed ahead of bends, roundabouts and junctions.