Intoxication limits — New Hampshire Permit Test
Intoxication limits on the New Hampshire permit test — 3 rules, each with the reason behind it and a question on it while it is fresh.
The rules
A driver is considered legally intoxicated if their blood alcohol concentration is .08% or higher.
Eight hundredths is where the law stops arguing about whether you are impaired and simply says you are.
It is considered legally intoxicated if a driver’s blood alcohol concentration is .08% or higher
For a driver under 21 years old, a blood alcohol concentration of .02% or higher is legally intoxicated.
Under 21 there is no lawful drink before driving, so the limit is set where a test can barely detect one.
.02% or higher if the driver is under 21 years old.
It is dangerous and against the law to operate a motor vehicle while under the influence of alcohol and/or drugs.
A drug bought without a prescription can slow a driver as surely as a drink, and the law does not care where it came from.
It is dangerous and against the law to operate a motor vehicle while under the influence of alcohol and/or drugs including prescription or over-the-counter drugs that may impair the ability to drive.
On the test
At what blood alcohol concentration is a driver legally intoxicated in New Hampshire?
.08% or higher. Eight hundredths is where the law stops arguing about whether you are impaired and simply says you are. New Hampshire Driver's Manual, p.6: “It is considered legally intoxicated if a driver’s blood alcohol concentration is .08% or higher”
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
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All New Hampshire permit topics
Where these come from
Every rule here is checked against New Hampshire Driver's Manual, published by the New Hampshire Division of Motor Vehicles, and against the state code itself. Last checked 2026-09-16.
- src/assets/drivers-manuals/NH.pdf (New Hampshire Driver's Manual, Rev. 11/25, New Hampshire Division of Motor Vehicles, retrieved 2026-09-14)
- src/assets/drivers-manuals/NH.pages.txt (plain pdftotext over that PDF; sha256 pinned in SOURCES.json)
- src/assets/drivers-manuals/SOURCES.json (sha256, folio offset 6, folioMarker, nonLawPages, signGalleryPages and the extraction flag, each with its basis)