Abstract
The primary function of Adaptive Cruise Control is to relieve the driver of monotonous tasks such as following a slower vehicle. Since it is a convenience system, it should be usable in the widest possible range of driving conditions. The system design includes the easiest possible setting of the desired speed and selection of a time gap suitable for the driving situation. The performance of the ACC sensor must be adequate for stationary following as well as approaching. Measurement inaccuracy, prediction uncertainty and overtaking behavior are considered when determining a suitable reaction range. The requirements for the lateral range of the sensor field of view are considered in relation to the curve geometry. The interdependence between the individual requirements for the sensor is described.