In the last two decades, the automotive industry has focused on the improvement of vehicle’s and occupant’s safety. Therefore, a variety of safety systems has been developed. For the development of such safety systems, the computer simulation has become meanwhile more and more important. For the computer simulation the vehicle dynamics, the sensors and the controllers of safety systems have to be reproduced. Furthermore, the active input of the driver has to be modeled. In this paper, the modeling of the driver’s behavior and his active intervention during critical traffic scenarios is presented. Therefore, his active tasks, like steering, accelerating and braking, have to be mapped. The path planning of the evasion maneuvers is realized by the theory of elastic bands where obstacles are modeled by repulsive potentials. Additionally, the necessary vehicle velocity has to be calculated. To determine the required driver’s intervention while following the planned path, the vehicle dynamics has to be considered. This is modeled with help of multibody systems in the three dimensional vehicle dynamic simulation environment FASIM C++. Finally, simulation results for a typical critical traffic situation are presented and discussed.