Abstract
Driver Assistance Systems (DAS) like e.g. distance control systems are more and more
evolving in a variety of cars, and the goal is mainly to support the driver in his driving task in
order to improve convenience and safety.
BMW pursuits a different way in developing DAS by focusing on dynamics and driver in-
volvement. The paper shows the BMW specific design and implementation of these systems
in BMW cars. Extra care is given to systems that interact with the vehicle dynamics on the
same level as the driver, i.e. for vehicle guidance. The strategic approach to DAS at BMW is
outlined and the resulting system functions are explained. Special emphasis is given to their
interaction with the driver and the MMI layout.
Starting with systems that influence the longitudinal dynamics like ACC (Active Cruise Con-
trol with radar sensor), future improvements are shown and the necessary requirements for
actors and sensors are explained. This directly leads to safety systems that rely on environ-
mental sensors in order to reduce collision probability.
These first generations of Active Safety Systems modify driver braking to optimize vehicle
deceleration with respect to collision mitigation and avoidance. The effect on the stopping
distance is supported by actual measurements. The warning concept is discussed in depth as it
has a high impact on the driver´s acceptance of the system. Results from driving simulator
runs support the concept.
In summary the various assistance systems result in an overall system layout that allows the
driver to have maximum driving pleasure while at the same time giving him a new perform-
ance level in active safety.
Keywords - Driver Assistance, Active Safety, MMI, Collision Warning, Brake Assist