As speed increases...
Human factor: Physical factors
Explanation
Driving at **high speed** has two important effects on the driver:
- **Reduction of the visual field**: As you increase speed, your ability to see what is happening on the sides is reduced. This is known as **tunnel vision**, where you can only clearly see what is directly in front of you, as if you were passing through a tunnel. This visual limitation can make it more difficult to react to unforeseen situations.
- **Acceleration of fatigue**: Driving fast for prolonged periods can increase **fatigue** and **tension**. This is because the body is in a constant state of alert, which can lead to faster tiredness and less safe driving. Additionally, frequent changes in speed also contribute to driver fatigue.
Therefore, by increasing speed, not only is the visual field reduced, but the onset of fatigue is also accelerated, which can compromise driving safety.
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