A system for influence the speed of a host vehicle while the host vehicle is driving in a lane based on a control unit evaluating an environment of a host vehicle. The system has an electronic control unit connected to many sensors. The sensors each generate a signal. The control unit controls the host vehicle based on the signals from the sensors and further calculates a “bendiness”characteristic value from a yaw rate signal of the host vehicle. Sensed objects including other vehicles which are further away than other vehicles from the host vehicle are excluded from selection as target vehicle based on the “bendiness” characteristic value.