2. Measuring fatigue according to different criteria

We've talked about the manifestation of fatigue through variations in the driver's physical and physiological states, and we're now going to look at information derived from driving.

According to the literature, driver fatigue can be observed through three main categories of criteria (or parameters): vehicle measurements, physiological measurements and physical measurements. In order to address the problem of measuring fatigue, which cannot be measured directly, we will study variations in various fatigue-related parameters, starting with vehicle measurements that are characteristic of fatigue.