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Some of the characteristic symptoms that indicate the onset of driver fatigue are:

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Yawning, frequent changes of posture and neck discomfort.

Yawning, a frequent need to change posture and muscular discomfort can warn of fatigue. Concentration may also decline and reaction time increase. These are signs to stop somewhere safe and rest; do not wait for a seizure or falling asleep. A seizure should not automatically be attributed to ordinary fatigue.

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  • Continuously improving concentration without tiredness.

  • Faster reactions and no discomfort.

  • Yawning, frequent changes of posture and neck discomfort.

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