**Alcohol** negatively affects a driver's ability to adequately perceive their surroundings. When a person consumes alcohol, their **brain and vision** are affected, which can lead to poor perception of traffic signs. This is dangerous because traffic signs are essential for road safety, as they guide and regulate drivers' behavior on the road.

- **Effects of alcohol on visual perception**: Alcohol causes drivers to see traffic signs and traffic lights worse. Additionally, it decreases the ability to correctly calculate the distance to other vehicles and increases the likelihood of being dazzled by the lights of other cars.

- **Consequences on driving**: Driving under the influence of alcohol is not only prohibited, but it can also result in fines or even imprisonment. This is because alcohol increases the risk of accidents by affecting the ability to make quick and accurate decisions.

For these reasons, it is crucial to avoid alcohol consumption before driving to ensure safe and responsible driving.