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Monitoring Driver Fatigue Via Driving Performance

This paper presents the concept of driver impairment monitoring (DIM) systems and their function of supplementing the process of self- monitoring. The purpose of DIM feedback based on actual performance is to increase the fidelity of self-monitoring processes under conditions of fatigue. The focus of this study was to investigate aspects of sensitivity and reliability of primary vehicle indicators of fatigue. Several measures of steering control and speed control are presented as candidate indicators of fatigue. One aim of the study was to to evaluate the relative sensitivity of these measures. In addition, the study includes both psychophysiological and subjective measures of fatigue. Both domains of measurement are included to assess the reliability of primary vehicle control by association with both psychophysiological and subjective correlates of impairment.