What is affected even with no alcohol in the drivers system?

Even with no alcohol in the driver's system, factors such as fatigue, distractions, and emotional stress can significantly impair driving ability. Additionally, the influence of medications or drugs, including over-the-counter ones, can affect reaction times and judgment. Environmental conditions, like weather or road hazards, also play a critical role in driving performance. Overall, safe driving requires a clear mind and full attention, regardless of alcohol consumption.