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California Impairment practice

Practice 48 California DMV questions on impairment. Answer interactively below with an instant explanation after every question.

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Example questions & answers

Which of the following is not a typical effect of marijuana on a person's driving ability?

A.Reduced ability to focus
B.Faster reaction time✓
C.Impaired night vision
D.Impaired sense of time, speed, and distance

Why: Marijuana impairs your ability to drive safely by slowing your reactions and reducing focus. It does not make you react faster; in fact, it does the opposite.

What is the second most common drug, after alcohol, found in drivers involved in accidents?

A.cocaine.
B.cold or allergy medications.
C.marijuana.✓
D.pain relievers.

Why: After alcohol, marijuana is the second most common drug found in the systems of drivers involved in traffic accidents. California's DUI laws apply to both alcohol and any drug that impairs your ability to drive safely.

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