  It remains uncertain regarding the safety of driving in autonomous vehicles
that, after a long, passive control and inattention to the driving situation,
how the drivers will be effectively informed to take-over the control in
emergency. In particular, the active role of vehicle force feedback on the
driver's risk perception on curves has not been fully explored. To investigate
it, the current paper examined the driver's cognitive and visual responses to
the whole-body haptic feedback during curve negotiations. The effects of force
feedback on drivers' responses on curves were investigated in a high-fidelity
driving simulator while measuring EEG and visual gaze over ten participants.
The preliminary analyses of the first two participants revealed that pupil
diameter and fixation time on the curves were significantly longer when the
driver received whole-body feedback, compared to none. The findings suggest
that whole-body feedback can be used as an effective "advance notification" of
hazards.
