Abstract
The authors turned their attention to the changes of inner responses (drive burden) of the driver when the external burden of follow-up driving was given to him and conceptualized a method of estimating drive fatigue by synthetically evaluating psychological and physiological responses of the driver during follow-up driving. The authors conducted an experiment on six male and female drivers to simultaneously measure their psychological and physiological responses such as the distance from the car ahead, eye and head movement, heartbeat fluctuation, and subjective fatigue and developed a model expression for quantifying drive fatigue synthetically. It was elucidated by the analysis performed by using the model expression that drive fatigue differed between straight sections and corner ones, between aged drivers and non-aged ones, and between male drivers and female ones.
