What is the first thing impaired in a driver who has been drinking alcohol?

The first thing that is impaired in a driver who has been drinking alcohol is judgment. Alcohol affects the central nervous system and begins to alter a person's ability to make sound decisions even at low levels of consumption. This impairment in judgment means that the driver may underestimate their level of impairment, make risky choices, or fail to properly assess potential dangers on the road.

While vision, coordination, and reaction time also experience impairment as drinking continues, the impact on judgment occurs first. For instance, a driver with compromised judgment might engage in behaviors such as speeding or weaving in and out of traffic, believing they are capable of driving safely. This initial impairment makes it crucial for individuals to understand the risks associated with drinking and driving and reinforces the importance of making responsible choices before taking the wheel.