**Alcohol** negatively affects the driver in several ways, especially in their **risk perception**. When you consume alcohol, you may feel a **false sense of security**, which leads you to take more risks and make more mistakes that can cause accidents. This means you underestimate the dangers on the road and do not correctly assess risky situations.

Furthermore, alcohol affects your ability to **see the environment** properly. You may have difficulty seeing traffic signs and signals, misjudge the distance to other vehicles, and have less ability to see what is happening around you. This contributes to a reduced perception of risk, as you cannot correctly evaluate road conditions.

Therefore, alcohol decreases your risk perception, which is a dangerous effect when driving.