The invention relates to a driver assistance system for a motor vehicle, the motor vehicle and a method for operating same. In some embodiments, an obstacle is detected based on environmental data and a risk of collision is determined in consideration of driving state data. Further, an evasion trajectory for preventing a collision of the motor vehicle with the obstacle is determined. The driver assistance system is configured to detect another oncoming vehicle for which the risk of collision is greater than a predefined first threshold value as the obstacle. Further, the driver assistance system is configured to check whether a control action of a driver of the motor vehicle is guiding same along the determined evasion trajectory and, if this is not the case, to modify the control action of the driver automatically such that the motor vehicle is guided along the determined evasion trajectory by the modified control action.