**Drowsiness** is a state in which the driver feels **tiredness** and **heaviness in the body**, affecting their ability to drive safely. This state can be caused by several factors, such as sleeping fewer hours than usual, changing sleep schedules, or driving after eating.

When a driver experiences drowsiness, they face several negative effects:

- **Slower reactions**: Reaction time increases, meaning the driver takes longer to respond to situations on the road.
- **Difficulty making decisions**: The ability to make quick and effective decisions is compromised.
- **Slow body movements**: The movements necessary to maneuver the vehicle become slower and clumsier.

These effects can lead to an **increase in confusion when executing maneuvers**, which raises the risk of accidents. Therefore, it is crucial that drivers avoid driving when they are drowsy to ensure their safety and that of others on the road.