Idaho · Class D knowledge

Free Idaho DMV practice test, with sources.

Practice Idaho school-bus rules, winter traction, mountain downgrades, bicycles, motorcycles, phones, alcohol limits, signals, markings, and right-of-way.

Start 10-question diagnostic Open the Idaho handbook

Agency: Idaho DMV
Official test: 40 questions
Minimum correct: 34 of 40 (85%)
Practice pool: 75 reviewed Idaho + shared questions
Reviewed: August 11, 2026

Idaho exam answer

How many Idaho answers must be correct?

Idaho's Class D knowledge test has 40 questions, and the current handbook allows no more than six misses, so at least 34 answers must be correct. This independent practice uses original questions, adaptive review, Saved Rules, and source-linked explanations; it does not reproduce Idaho DMV test items or guarantee an official result.

Sample question · no JavaScript needed

Before a long Idaho downgrade, how should you prepare?

Select a lower gear before speed builds
Shift to neutral and coast
Ride the brakes continuously

Answer: A. Engine resistance and controlled braking help preserve braking capacity on a long grade.

Idaho · Driver's Handbook · Mountain Driving — Downgrades · reviewed 2026-08-11

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Build an Idaho baseline, then repair weak rules.

Use the same source-cited learning loop available across every published state.

Idaho coverage

Winter traction, mountain grades, and Idaho-specific law.

The reviewed set combines high-frequency permit rules with Idaho's winter surfaces, mountain control, school buses, motorcycles, bicycles, device distraction, alcohol standards, and Class D test structure.