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Criteria for determining drowsy driving according to driver behavior.
| State (Value) | Indicators |
|---|---|
| Normal (0) | Eyes kept open, head in line, rapid eyeball movement, looking around |
| Drowsy (1) | Face stretching, yawning, sighing, intentional blinking of eyes, swallowing, face moving up and down (head-banging), slowing down of the eye blink, decreased degree of an open eyelid, open eyes consciously, fully closed eyes, slanted head, dozing |
