Road user perception and decision making-in the view of the administration-

The procedure of seeing exists of a physical and a psychic element. The efficiency of the psychic element depends on attentiveness, fatigue, concentration of the road user. The driver mainly depends on visual information. The driver suffers a loss of information in darkness, by technical progress and by the incorrectly estimating the increase in danger and the reduction of possibilities for information in the case of higher speeds. Countermeasures to this are discussed.