This paper proposes a method for estimating the degree of “Negligent driving tendency” of a following vehicle driver from behavioral information of the following vehicle that can be observed from own vehicle. The relation between the degree of the tendency and the vehicle behavior was investigated for 16 subjects by an experiment on a driving simulator. As a result, it was found that the correlation between the degree of the tendency and the minimum value of TTC (Time to Collision) to the leading vehicle is high. Based on the result, a method for estimating the degree of “Negligent driving tendency” of a following vehicle driver from observed TTC values was proposed and the performance was evaluated for the data on the driving simulator. Also, the feasibility of the proposed method was examined by analyzing driving behavior data of actual vehicles on public roaDS and the possibility that the method is applicable to actual vehicles was shown.
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