**Fatigue** is an important factor that affects the driver's condition and can increase the risk of accidents on the road. There are two types of fatigue: **physical** and **psychological**. Physical fatigue causes a feeling of tiredness, while psychological fatigue makes it difficult to concentrate.

When a driver is tired, they experience several **symptoms** that affect their ability to drive safely:

- **Difficulty concentrating** on the road.
- **Impaired vision and hearing**, which may cause them not to perceive the environment well.
- **Slower reactions**, meaning it takes longer to respond to traffic situations.
- **Slower movements** and frequent changes of posture in the seat.
- **Nervousness and irritability**, which can lead to impulsive or incorrect decisions.

These symptoms indicate that a tired driver **gets distracted more quickly and more often**, confirming that fatigue negatively affects their ability to concentrate and react appropriately on the road. Therefore, it is crucial to recognize these signs and take measures, such as resting, to avoid dangerous situations while driving.