The Minnesota impaired driving law — Minnesota Permit Test
The Minnesota impaired driving law on the Minnesota permit test — 4 rules, each with the reason behind it and a question on it while it is fresh.
The rules
A person with an alcohol concentration of 0.08 percent or higher who is in control of a moving or parked vehicle can be arrested for DWI.
Being parked is not a defense, because being in control of the vehicle is what the law names.
A person with an alcohol concentration of 0.08 percent or higher (0.04 percent if driving a commercial vehicle) who is in control of a moving or parked vehicle can be arrested for driving while impaired (DWI).
For a commercial vehicle the DWI threshold is 0.04 percent.
A bigger vehicle leaves less room for error, so the state halves the figure.
A person with an alcohol concentration of 0.08 percent or higher (0.04 percent if driving a commercial vehicle) who is in control of a moving or parked vehicle can be arrested for driving while impaired (DWI).
Where an officer can prove alcohol caused driving errors, a driver can be arrested for DWI with a concentration as low as 0.04 percent.
The limit is not a safe harbor: the driving itself can be the evidence.
If a law enforcement officer can prove that alcohol caused the driver to commit driving errors, the driver can be arrested for DWI with an alcohol concentration as low as 0.04 percent.
The DWI law also applies to off-road recreational vehicles and motorboats.
A snowmobile or a boat can kill somebody as readily as a car, and the law follows the driver.
This law also applies to the operation of off-road recreational vehicles and motorboats.
On the test
What alcohol concentration can bring a DWI arrest in Minnesota?
0.08 percent or higher. Being parked is not a defense, because being in control of the vehicle is what the law names. Minnesota Driver’s Manual, p.91: “A person with an alcohol concentration of 0.08 percent or higher (0.04 percent if driving a commercial vehicle) who is in control of a moving or parked vehicle can be arrested for driving while impaired (DWI).”
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.
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Where these come from
Every rule here is checked against Minnesota Driver’s Manual, published by the Minnesota Department of Public Safety, and against the state code itself. Last checked 2026-09-22.
- src/assets/drivers-manuals/MN.pdf (Minnesota Driver’s Manual, May 2025, Minnesota Department of Public Safety, Driver and Vehicle Services, retrieved 2026-09-14; sha256 pinned in SOURCES.json)
- src/assets/drivers-manuals/MN.pages.txt (the plain pdftotext fixture every citation here was cut from and verified against; sha256 pinned in SOURCES.json)
- src/assets/drivers-manuals/SOURCES.json, MN entry -- the folio offset of 3 and its basis, the folio marker, the extraction-flag score and the welded compounds it costs, and the record of where the exam shape comes from