Alcohol, Drugs, and Impaired Driving Flashcards

What does a Breathalyzer device measure when used during a traffic stop?

Answer: Blood alcohol concentration estimated through exhaled breath

A Breathalyzer estimates BAC by measuring the concentration of alcohol in exhaled breath, which correlates with blood alcohol levels.

Which action is the safest choice when you plan to consume alcohol?

Answer: Designate a sober driver or use a rideshare service

Designating a sober driver or using a rideshare service is the only fully safe option, as no food, coffee, or shower eliminates alcohol impairment.

How do fatigue and alcohol consumption interact when combined?

Answer: Fatigue and alcohol together significantly increase impairment beyond either alone

Fatigue compounds alcohol's sedative effects, making even a low BAC far more dangerous when combined with drowsiness.

What is the legal BAC limit for drivers of commercial motor vehicles (CMV) in the United States?

Answer: 0.04%

Federal regulations set the BAC limit for commercial drivers at 0.04%, half the standard limit, reflecting the higher responsibility of operating large vehicles.

Which of the following methods can accelerate the elimination of alcohol from your body?

Answer: None of the above — only time allows the body to eliminate alcohol

The liver metabolizes alcohol at a fixed rate of about one standard drink per hour; no food, exercise, or stimulant can speed up this biological process.

What is the primary safety risk of driving while impaired by alcohol or drugs?

Answer: Greatly increased risk of crashes, serious injuries, and fatalities

Impaired driving dramatically increases crash risk and is one of the leading causes of traffic fatalities in the United States.

Under implied consent laws, what typically happens if a driver refuses to submit to a chemical test (breathalyzer or blood draw) when lawfully arrested for DUI?

Answer: The driver's license may be automatically suspended and refusal can be used as evidence in court

Refusing a chemical test under implied consent laws typically results in automatic license suspension and the refusal itself can be introduced as evidence of guilt in a DUI prosecution.