The field of controlled suspension is developing rapidly. By improving the trade off between ride comfort and handling, such systems have bettered the global car performance. Up until now, controlled suspension made it possible to improve comfort and performance in most cases, with the result being at least equal to that of the reference passive suspension vehicle. The new system described here affords superior passenger comfort and safety irrespective of the road profile and driving situation. The experimental vehicle built by Renault, which was developed in conjunction with Lipmesa associated with Sagem, is equipped with four quick-acting variable-damping shock absorbers. The damping force is controlled in real time on the basis of information qualifying the pilot‘s driving, e.g. steering-wheel information, and information obtained from the road profile, such as the absolute car-body and wheel velocity. The set value of force is calculated taking into account the velocity of shock absorber displacement and the map of its force-velocity pattern. The results of the simulation calculations and the dynamic tests performed on the vehicle show the effectiveness of this new concept, which provides a substantial improvement in safety combined with increased comfort.