Study on Detection of Driver’s Drowsiness Level

This paper describes the detection of a driver’s drowsiness level rated by facial expression. An experiment was conducted to evaluate the method for building a model to estimate drowsiness. Thirty-one participants were instructed to follow a high-speed vehicle in a driving simulator to reduce the arousal level. Eleven measurements, including the facial expression, driving behavior, and physiological measurements, were recorded. The correlation between the drowsiness level and measurements were analyzed. The measured values with strong contributions to the estimated drowsiness level were extracted.