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Idaho Class D Knowledge Practice Test

Practice Idaho traffic controls, traffic laws and safe-driving decisions for the Class D knowledge test with source-linked English explanations.

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Free practice tests

20 questions each: 5 road signs and 15 road rules

  1. Practice Test 120 questions
  2. Practice Test 220 questions
  3. Practice Test 320 questions
  4. Practice Test 420 questions
  5. Practice Test 520 questions
  6. Practice Test 620 questions

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Road signsLearn with 106 source-linked questions and immediate explanations.Start learningRules of the roadLearn with 150 source-linked questions and immediate explanations.Start learning

Official test facts

Review the published test format and source information.

View test facts

40

Questions per test

34

Practice target

256

Published study questions

6

Free practice tests

Official test facts

What to expect in Idaho

Official 40-question knowledge test

The Idaho handbook states that the knowledge test has 40 questions and permits no more than six wrong answers. Passing requires at least 34 correct answers, or 85%.

Official source

Three-day retest wait

The official handbook states that an applicant who fails the knowledge test must wait three days before retesting.

Official source

Original TLA learning allocation

This practice mock uses 10 sign questions and 30 rules questions. That split is a Trusted Local Auto learning choice. The reviewed official sources do not specify a sign subtotal or separate sign minimum.

Official source

Source and review method: question content is stored with its source metadata and remains outside public practice until it is published. Official-format facts on this page were reviewed on 2026-09-14 against Idaho Driver's Handbook and the linked licensing authority pages.

Frequently asked questions

Is the Idaho Class D Knowledge practice test free?

Yes. All 256 questions, with their answers and explanations, are free, and so are the 6 numbered practice tests. You do not need an account to practise. You get 1 free exam simulation, and 2 with a free account. A free account also keeps your progress on all your devices. The optional Exam Pass is a one-time payment for one test and 90 days, not a subscription. It adds practice tools: practice by topic, practice of missed and saved questions until you get them right, more exam simulations, a timed exam simulator and a chance-to-pass score.

Read about the Exam Pass

Guided learning

Choose a topic, then keep your place

Open the learning workspace for immediate explanations, topic progress, and focused review without crowding this overview.

Licensing & Test Readiness12 questionsRegulatory, Lane & Parking Signs30 questionsWarning, Construction & Information Signs55 questionsTraffic Signals & Road Markings16 questionsObservation, Speed & Space9 questionsIntersections & Right-of-Way15 questionsTurns, Lanes, Passing & Merging11 questionsParking, Reversing & Roadside Stops12 questionsSharing the Road18 questionsFreeways & High-Speed Roads8 questionsSchool Zones, Railways & Work Areas23 questionsWeather, Visibility & Emergencies18 questionsVehicle Safety, Documents & Towing13 questionsSafe & Responsible Driving16 questions
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