**Fatigue** in the driver is a state that can have both physical and psychological negative effects. One of the most common physical symptoms of fatigue is the **feeling of tiredness**, which can manifest as **neck and back pain**. These pains are a sign that the body is experiencing tension and exhaustion, which is typical when one has been driving for long periods without rest.

Additionally, fatigue affects the ability to concentrate and can cause the driver to move around a lot in the seat, seeking a more comfortable position due to discomfort or pain. It is important to recognize these symptoms and take measures to rest and recover before continuing to drive, as fatigue can increase the risk of accidents on the road.