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Illinois permit test: alcohol, cannabis, drugs and dui

BAC and drug presence, cannabis, implied consent, statutory summary suspension, DUI convictions, BAIID, and rules for drivers under 21. 24 questions, 10 at a time, starting with ones you haven't seen.

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Rules to remember10 key alcohol, cannabis, drugs and dui rulesShow the rules
  1. If an officer suspects cannabis impairment, the driver must submit to field sobriety and/or roadside tests or face suspension. (p. 51)
  2. Time is the only way to remove alcohol's effects. (p. 51)
  3. Even with a BAC under 0.08%, you can be convicted of DUI if your driving ability is impaired. (p. 51)
  4. A test showing a BAC of 0.08% or more brings a 6-month statutory summary suspension for a first offender. (p. 52)
  5. At arrest the officer takes your license and, if valid, gives you a receipt to drive for 45 days. (p. 52)
  6. A DUI with a BAC of 0.16% or more, or while carrying a child under 16, may bring enhanced penalties. (p. 53)
  7. A first DUI conviction brings a minimum 1-year revocation, on top of any statutory summary suspension. (p. 53)
  8. A driver under 21 convicted of a first DUI faces revocation for at least 2 years. (p. 55)
  9. Lending your car to someone you know is under the influence is illegal in Illinois, so the owner can be charged too. (p. 55)
  10. Drivers under 21 found with any trace of alcohol while driving have their privileges suspended for at least 3 months. (p. 55)

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

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Sample alcohol, cannabis, drugs and dui questions

  1. 1.A first-time DUI offender chooses not to get a Monitoring Device Driving Permit, then is caught driving during the suspension. What is the charge?

    • AA felony
    • BA warning
    • CA petty offense
    • DA parking ticket
    Show the answer

    ✓ A. A felony

    A first-time offender may get an MDDP with an ignition interlock or not drive. Choosing not to and then driving during the suspension is a felony.

    Source: Illinois Rules of the Road (2026), page 53

  2. 2.A first-time offender's chemical test shows a BAC of 0.09%. How long is the statutory summary suspension?

    • A6 months
    • B3 years
    • C1 year
    • D3 months
    Show the answer

    ✓ A. 6 months

    A test showing a BAC of 0.08% or more brings a 6-month statutory summary suspension for a first offender. Refusing the test brings 1 year.

    Source: Illinois Rules of the Road (2026), page 52

  3. 3.A driver's BAC tests at 0.06%, but the officer saw him weaving badly. Can he be convicted of DUI?

    • AYes, if his driving ability is impaired
    • BNo, he is under the 0.08% limit
    • CNo, only a blood test can prove DUI
    • DOnly if he is under age 21
    Show the answer

    ✓ A. Yes, if his driving ability is impaired

    Even with a BAC under 0.08%, you can be convicted of DUI if your driving ability is impaired.

    Source: Illinois Rules of the Road (2026), page 51

  4. 4.When can a driver be charged with Aggravated DUI?

    • AWhen driving 5 mph over the limit
    • BWhen a passenger has a drink
    • CWhen a DUI causes an injury crash
    • DWhen parking illegally
    Show the answer

    ✓ C. When a DUI causes an injury crash

    Aggravated DUI includes being in a death or injury crash while under the influence, a third DUI, or DUI without a license or insurance.

    Source: Illinois Rules of the Road (2026), page 54