Abstract
Probabilistic modeling was performed by applying the technique of system reliability engineering for the right-turn accident modeling based on the fall of the consciousness of a driver. This originates in state transition of human consciousness and the reaction time delay to recognize dangerous situation as factors of the accident. As a result, followings are clarified. The probability when the consciousness of a driver is foiling, is determined quantitatively by analyzing state transitions of consciousness. The probability when a right-turn and an on-coming driver would fail in collision is expressed at the probability of the fell of the consciousness of a driver and the probability of not avoiding a collision due to the fell of the consciousness.
