A method for determining a safety zone of a foreign object for a forward collision risk reduction system. The method may include determining the type of the foreign object; setting the safety zone to a predetermined value corresponding to the type of the foreign object; determining the traffic behavior of the foreign object; determining if the traffic behavior corresponds to a species of a predetermined group of traffic behaviors; and if the traffic behavior corresponds to a species of a predetermined group of traffic behaviors, modifying the safety zone in accordance with a predetermined species function corresponding to the species.
展开▼