How does alcohol affect driving ability and crash risk?

• A. It impairs coordination, reaction time, judgement, and increases crash risk.
• B. It improves reaction time.
• C. It has no effect on driving.
• D. It reduces crash risk at any level of intake.

Answer: (A)

Alcohol slows the brain and nervous system, so driving performance drops as you drink. This shows up as poorer coordination (sloppier steering and pedal control), slower reaction times (less time to brake or steer away from hazards), and impaired judgement (misjudging speed, distance, or gaps). Together, these changes make it easier to miss hazards, drift out of your lane, or undertake risky driving behaviors, all of which raise the chance of a crash. Visual processing and attention can also be reduced, so you may not notice dangers as quickly. The bottom line is that alcohol impairs the abilities essential for safe driving, increasing crash risk, even at lower levels of consumption. Different people are affected to varying degrees depending on factors like weight, food in the stomach, and tolerance, but the general effect is clear: impairment, not improvement or no effect.