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Oregon permit test: impaired driving

Oregon's DUII law, alcohol, cannabis and other drugs, and medications that impair driving. 14 questions, 10 at a time, starting with ones you haven't seen.

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Rules to remember9 key impaired driving rulesShow the rules
  1. You can be arrested for DUII whenever alcohol or drugs are affecting you, even if your BAC is lower than 0.08%. (p. 90)
  2. Alcohol is the most common drug involved in impaired driving, though marijuana has also contributed to many Oregon collisions. (p. 90)
  3. Oregon has a zero tolerance law, so drivers under 21 fail a test with any alcohol in their blood. (p. 91)
  4. Refusing a test under the Implied Consent law can bring a fine, a suspension of your driving privileges, or both. (p. 91)
  5. Drivers 21 or over fail the test if their blood alcohol concentration is 0.08 percent or more. (p. 91)
  6. A container is considered open if its seal is broken, even if it has been reclosed. (p. 91)
  7. By driving in Oregon, you agree to take a breath, blood, or urine test when a police officer asks. (p. 91)
  8. Oregon's Open Container law says any open bottles or containers should be in the trunk. (p. 91)
  9. In Oregon, the DUII law covers any substance that affects your ability to drive, so a legal medicine can count. (p. 91)

Taken from the explanations to checked practice questions; page numbers link to the official handbook.

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Sample impaired driving questions

  1. 1.A police officer asks you to take a breath test and you refuse. What can happen?

    • ANothing, because testing is optional
    • BYou must retake the knowledge test
    • CA fine and/or suspended driving privileges
    • DOnly a written warning
    Show the answer

    ✓ C. A fine and/or suspended driving privileges

    Refusing a test under the Implied Consent law can bring a fine, a suspension of your driving privileges, or both.

    Source: Oregon Driver Manual 2026-2027 (Form 735-37) (2026 - 2027), page 91

  2. 2.You are 22. At what BAC would you fail an Oregon breath test?

    • A0.10 percent or more
    • B0.05 percent or more
    • C0.08 percent or more
    • DAny amount
    Show the answer

    ✓ C. 0.08 percent or more

    Drivers 21 or over fail the test if their blood alcohol concentration is 0.08 percent or more.

    Source: Oregon Driver Manual 2026-2027 (Form 735-37) (2026 - 2027), page 91

  3. 3.An adult driver's BAC is 0.06%, but drinking is affecting their driving. Can they be arrested for DUII?

    • ANo, 0.08% is the only test
    • BYes, even below 0.08%
    • COnly if they are under 21
    • DNo, unless they caused a crash
    Show the answer

    ✓ B. Yes, even below 0.08%

    You can be arrested for DUII whenever alcohol or drugs are affecting you, even if your BAC is lower than 0.08%.

    Source: Oregon Driver Manual 2026-2027 (Form 735-37) (2026 - 2027), page 90

  4. 4.You start a new medicine and are not sure it is safe to drive. What does the manual advise?

    • ADrive only on local streets
    • BDrive slowly with hazard lights on
    • CFind different transportation
    • DDrink coffee before driving
    Show the answer

    ✓ C. Find different transportation

    If you are not sure a new medication is safe for driving, it is best to find different transportation and ask your doctor or pharmacist about side effects.

    Source: Oregon Driver Manual 2026-2027 (Form 735-37) (2026 - 2027), page 91