The present invention relates to a driver assistance system for lane keeping support of a motor vehicle, in which the determination of the entry of a hazardous situation, by means of two determining types takes place, wherein in the case of one of the determination of types of the entry of the hazardous situation as a function of the remaining time up to the entry of the hazardous situation and in the case of the other determining the nature of the entry of the hazardous situation as a function of the remaining lateral distance to the location of the hazardous situation is determined, and wherein for the triggering of a warning at least a determination of value of at least one of the two is used to determine types. The present invention furthermore relates to a device for the operation of a driver assistance system for lane keeping support, which is characterized in that a unit for the determination of the entry of a hazardous situation, as a function of the remaining time up to the entry of the hazardous situation and a unit for the determination of the inlet of the hazardous situation as a function of the remaining lateral distance to the location of the hazardous situation comprises.
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