Commercial drivers have stricter rules. A 0.04% BAC may lead to disqualification or termination.

Most jurisdictions have zero tolerance laws, meaning any detectable alcohol can lead to penalties for underage drivers.

Even small amounts of alcohol impair coordination, judgment, and reaction speed, increasing crash risk.

Marijuana can slow reaction time and impair decision-making, affecting safe driving ability.

First-time DUI offenses often result in a fine, mandatory classes, and a license suspension of 6–12 months.

Some prescription drugs cause drowsiness or slow reflexes, and using them before driving can be legally treated as DUI.

Under implied consent laws, refusal may lead to license suspension, even without a DUI conviction.

The liver processes about one standard drink per hour. Time is not coffee or showers is what reduces BAC.

Alcohol and drug combinations have a multiplying effect, greatly increasing risk of accidents and overdose.

If your driving is impaired, you can be charged with DUI even under the legal BAC limit. Behavior matters more than numbers.

These amounts all contain about the same amount of alcohol. Knowing this helps track your BAC.

Just one drink can reduce your ability to react quickly and make safe decisions.

Many medications caution against operating machinery. Always check with your doctor or pharmacist before driving.

These laws make it illegal for minors to drive with any measurable alcohol in their system.