Abstract
This report is mental stress of the driver under driving condition in the general urban district road who car variously runs. By measuring the electrocardiogram as a biological reaction by mental strain of the driver, and doing wavelet transform of RR interval time series, the mental strain (sympathetic nerve, parasympathetic nerve) of the driver was shown in time domain, the relevance to the running velocity, acceleration, image by the video camera as a running circumstance was examined.
