| Summary: | The steering vibrations include the useful information, such as road condition, for the drivers. Therefore, the various evaluations about relations of the steering vibration characteristics and the road information are carried out. In this paper, the human vibration sensitivities of the steering vibration concerned with the road information were evaluated first. It is clarified that the vibration direction of frequency band more than 20Hz can’t be discriminated and the sensitivity of the vibration power is decrease at an incline of 10dB/dec for frequency. Next, the evaluating method of the steering vibration using the steering simulator was examined based on the human vibration sensitivities. As a result, it was clarified that the steering vibration can be evaluated by the vibration combination of the rotational vibration and the translation vibration more than 20 Hz.
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