Certified ignition interlock device — Arizona Permit Test
Certified ignition interlock device on the Arizona permit test — 4 rules, each with the reason behind it and a question on it while it is fresh.
The rules
A Certified Ignition Interlock Device is a breath alcohol tester connected to the vehicle's ignition and power system.
Because it is wired to the ignition, the car itself refuses to go. The driver cannot just promise to stay sober.
A Certified Ignition Interlock Device is a breath alcohol testing instrument connected to the ignition and power system of the vehicle.
If the driver's breath alcohol is above the set level, a vehicle with an interlock will not start.
A car that will not start cannot be driven drunk. That is the whole job of the device.
The driver blows into the device before attempting to turn the ignition.
While a vehicle with an interlock is running, the driver must blow into the device at random intervals.
A random test stops a driver from having a sober friend start the car and then drinking on the road.
While the vehicle is in operation, the driver must blow into the device at random intervals.
A driver with a Special Ignition Interlock Restricted Driver License must follow the interlock rules, finish required alcohol classes and carry proof of future financial responsibility insurance.
The restricted license is a trust given back in steps. Insurance proof makes sure anyone hurt can still be paid.
The person must comply with the Certified Ignition Interlock Device requirements, complete alcohol treatment classes when required and carry proof of future financial responsibility insurance.
On the test
What is a Certified Ignition Interlock Device?
A breath tester wired to the ignition. Because it is wired to the ignition, the car itself refuses to go. The driver cannot just promise to stay sober. Arizona Driver License Manual and Customer Service Guide, p.67: “A Certified Ignition Interlock Device is a breath alcohol testing instrument connected to the ignition and power system of the vehicle.”
How this works
Most practice tests hand you a bank of questions and leave the manual somewhere else. This one puts them together.
You read one law and the reason behind it, then answer a question on that law while it is still fresh. Get it right and you move on; get it wrong and you have found the gap while it is cheap to fix, not on the morning of the exam.
Learning one rule at a time, and proving it immediately, is what turns a manual you skimmed into something you actually know — and it makes studying feel like getting somewhere rather than like waiting to find out.
What it costs
- One payment, once — not a subscription. Nothing renews and there is nothing to cancel, for an exam you sit one time.
- Free to start: a 10-question test and the first section of cards. No sign-up and no account.
- Paying opens the rest of the cards, unlimited full-length practice tests, and retests built from exactly the questions you got wrong.
- Every level up to Prepared — 3 tests passed in a row.
- Do the work, fail the real exam, and we refund you.
Where these come from
Every rule here is checked against Arizona Driver License Manual and Customer Service Guide, published by the Arizona Department of Transportation, and against the state code itself. Last checked 2026-09-28.
- src/assets/drivers-manuals/AZ.pdf (Arizona Driver License Manual and Customer Service Guide, Revised September 2026, ADOT MVD, retrieved 2026-09-14; sha256 pinned in SOURCES.json)
- src/assets/drivers-manuals/AZ.pages.txt (the plain pdftotext fixture every citation here was cut from and verified against; sha256 pinned in SOURCES.json)
- src/assets/drivers-manuals/AZ-exam.html (azdot.gov/mvd/services/driver-license-ID/permit-test as served on 2026-09-28; the only source for both exam figures)
- src/assets/drivers-manuals/SOURCES.json, AZ entry -- the folio marker and its basis, the extraction-flag score and its welded compounds, and the record of where the exam shape comes from
- docs/plans/how-to-build-laws.md (the runbook this corpus follows)