Abstract

Analyzing the physiological data measured in driving over time, the aim of this study was to identify the effects of fatigue experienced among drivers. Heart Rate Variability(HRV) and Electroencephalogram (EEG) were measured as the indicator of fatigue. While HRV decreased when the workload of drivers increased, it increased when the attention of drivers decreased because of fatigue. In the case of EEG, fast waves such as alpha wave and beta wave are correlated with the level of arousal but slow waves such as delta wave and theta wave are related with the relaxation or sleeping. The results of analyzing the behaviour of driving and the variance of HRV showed that HRV increased over time in three studies except the study 2, which were used to identify the effects of fatigue in this study, especially after 30 minutes the increase of HRV is to be manifest. I analyzed the variance of HRV and EEG in the research 1 which was capable of observing the conditions of driving. The results showed that the increase of HRV appeared in 10-15, 30-35, and 60-65 minutes, especially in 30-35 minutes the peak of the increase of HRV was highest. Analyzing the variance of HRV in the course of driving, the driving in a high way caused HRV to be highest but the driving in a lamp did it to be lowest. In addition, as moving on a local way from an I.C. HRV progressively increased. The results of analyzing the variance of HRV related with the speed of driving showed that the measurements in driving fast were higher than in driving slowly. In relation to smoking during driving, I analyzed the measurements of HRV before/during, and after smoking. The results showed that as moving on the stage of finishing smoking from the stage before smoking, the measurements of HRV progressively decreased. Using the data of research 1, the measurements of EEG over time were analyzed to examine the effects of fatigue also. The results showed that fast waves meaning the level of arousal decreased, however slow waves meaning the relaxation or sleeping increased, especially after 30 minutes these changes were to be clear. In discussion the problem of this study and the suggestion of the following study were described.