Analysis of head tilt strategy of car drivers

Car drivers receive the acceleration stimulation and the rotational stimulation when negotiating with a curve. In such a situation, the driver controls his/her posture such as the head and the body appropriately. It is known that the driver tilts his/her head to the direction of the curve turns. In this research, the driver´s head tilt strategy in roll direction is investigated for understanding of comfortable vehicle motion. From the experimental results with a real car, high correlation is found between vehicle lateral acceleration and the driver´s head roll angle. In addition, relationship between the vehicle roll angle and the driver´s head movement is investigated in the experiment with a driving simulator with 1 dof motion in the roll axis. It is found that the driver adjusts his head based on the roll of the car.