Idaho: DUI & Alcohol Laws Questions
7 real, verified Idaho driving-test questions on dui & alcohol laws, each with the correct answer and a full explanation below. Want to practice these interactively instead? Start a DUI & Alcohol Laws practice round.
1. What BAC makes a commercial vehicle operator guilty of driving under the influence in Idaho, compared to a standard driver 21 or older?
Why: Idaho's BAC thresholds are .02 or more under 21, .04 or more for commercial vehicle operators, and .08 or more for a driver 21 or older; .20 or more carries even stiffer penalties.
2. What license suspension applies to a first DUI conviction in Idaho for a driver 21 or older?
Why: A first DUI conviction brings up to 6 months in jail, up to a $1,000 fine, and a mandatory 90-180 day license suspension (one year if under 21), with absolutely no driving privileges for the first 30 days.
3. What makes a third DUI conviction within 10 years different in kind from a first or second in Idaho?
Why: A third or later DUI conviction within 10 years is a felony, carrying a mandatory jail sentence of 30 days to 10 years, up to a $5,000 fine, and a mandatory 1-5 year license suspension.
4. What happens after a first failed evidentiary (BAC) test in Idaho?
Why: A first failed evidentiary test triggers a 90-day Administrative License Suspension with 30 days absolute no driving, plus a mandatory 1-year ignition interlock device requirement after the suspension ends.
5. What civil penalty applies to a first-time refusal of an evidentiary test in Idaho, on top of the license suspension?
Why: Refusing an evidentiary test results in a 1-year absolute license suspension plus a $250 civil penalty for a first refusal, escalating to a 2-year absolute suspension for a second refusal within 10 years.
6. How many points within 12 months triggers a 30-day license suspension in Idaho?
Why: Idaho's point thresholds are 8-11 points in 12 months for a warning letter, 12-17 points in 12 months for a 30-day suspension, 18-23 points in 24 months for a 90-day suspension, and 24+ points in 36 months for a 6-month suspension.
7. How many points can be removed from an Idaho driving record by completing an ITD-approved Defensive Driving Course?
Why: Points can be removed once every three years -- up to 3 points via an ITD-approved Defensive Driving Course, or up to 4 points via a Traffic Safety Education Course offered by law enforcement at citation.
More Idaho Topics
- Crashes, Insurance & License Actions (5)
- Licensing Procedure & Documents (4)
- Minor & Provisional Licensing (10)
- Rules of the Road (10)
Rules and requirements change — always confirm current details with Idaho ITDbefore your exam. Take the full Idaho practice test or check the Idaho cheat sheet.