Hence, it can be observed that in stressful conditions, i.e., from phases C1 to C3 in Figure 16 , the driver is subject to a psycho-physiological activation, with the mean HR exhibiting an increasing trend.
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Hence, it can be observed that in stressful conditions, i.e., from phases C1 to C3 in Figure 16 , the driver is subject to a psycho-physiological activation, with the mean HR exhibiting an increasing trend.