What the Idaho driver's license written test covers
Idaho's written test for a driver's license has 40 questions, and you need to answer at least 32 correctly to pass. The test covers three main areas: road signs and their meanings, traffic laws specific to Idaho, and safe driving practices. You take the test on a computer at your local Idaho Department of Transportation (ITD) office.
The questions are multiple choice with four options each. Some questions show you a picture of a road sign and ask what it means. Others describe a driving situation — like an intersection with a traffic light turning yellow — and ask what you should do. The test does not include questions about your vehicle's mechanical systems or how to perform maintenance.
You can take the test in English or Spanish. If you fail, you can retake it the same day at most ITD offices, though you may have to wait and pay the test fee again.
Key Takeaways
- Idaho's written test has 40 multiple-choice questions, and you must answer at least 32 correctly to pass.
- The test covers road signs, Idaho traffic laws, and safe driving practices, taken on a computer at an ITD office.
- Official practice tests are available free on the ITD website and match the format and content of the real test.
- You can retake the test the same day if you fail, but you will pay the test fee again.
- Studying the Idaho Driver's Manual is the most direct way to prepare, since the real test draws directly from it.
Using the official Idaho practice test
The Idaho Department of Transportation provides a free practice test on its website at itd.idaho.gov. This is the most reliable way to prepare because it uses the same question format and covers the same topics as the real test. The practice test is interactive — you answer questions on a computer just as you will on test day.
The practice test does not have a time limit, so you can work through it at your own pace. When you finish, the system shows you which questions you answered wrong and explains the correct answer. This feedback is valuable because it tells you which topics need more study. You can take the practice test as many times as you want.
Some ITD offices also offer printed practice tests at the office itself. If you prefer paper, call your local ITD office to ask whether they have copies available.
Studying the Idaho Driver's Manual
The Idaho Driver's Manual is the source document for all questions on the written test. You can read it free as a PDF from the ITD website, or pick up a printed copy at any ITD office. The manual is organized by topic — speed limits, right-of-way rules, parking, pedestrian safety, and so on — which makes it easier to study in sections rather than all at once.
The manual includes pictures of road signs with their meanings, which is important because the test will show you signs and ask what they mean. Pay special attention to warning signs (yellow with black symbols), regulatory signs (white or red with black text), and guide signs (green with white text). The manual also explains Idaho-specific rules that differ from other states, such as the state's laws about headlight use and school bus procedures.
A practical study method is to read one section of the manual, then take the practice test questions related to that topic. This approach reinforces what you just learned and shows you right away whether you understood it.
Common mistakes on Idaho's written test
Many test-takers miss questions about right-of-way at four-way stops. Idaho law says that if two vehicles arrive at a four-way stop at the same time, the vehicle on the right has the right of way. If you are turning left and another vehicle is going straight, the straight vehicle goes first. These rules appear on the test in different scenarios, so understanding the principle — not just memorizing one situation — helps you answer variations correctly.
Another frequent mistake involves speed limits in school zones. Idaho requires drivers to slow to 20 miles per hour in school zones during school hours, and many test-takers either forget this rule or confuse the speed limit. The test will ask about school zone speeds, so review that section carefully.
Questions about parking also trip up many test-takers. Idaho has specific rules about where you cannot park — within 15 feet of a fire hydrant, for example, or in a handicap space without a permit. Read the parking section of the manual twice if parking rules are not familiar to you.
What to bring and expect on test day
Bring a valid form of identification to your ITD office on the day you take the test. Acceptable forms include a passport, birth certificate, or a document from your school or employer with your name and date of birth. You will also need to bring your Social Security number or Individual Taxpayer Identification Number (ITIN). If you do not have these documents, call your local ITD office before you go to ask what alternatives they accept.
Arrive at least 15 minutes before your scheduled test time. The ITD office will check your identity, have you sign a form confirming you understand the test rules, and then seat you at a computer. You will have time to read instructions on the screen before the test begins. The test itself usually takes 20 to 30 minutes.
You cannot bring notes, phones, or other materials into the testing area. The computer screen will display each question one at a time, and you navigate using the mouse or keyboard. After you answer all 40 questions, the system scores your test when ready and tells you whether you passed.
Retaking the test if you do not pass
If you score below 32 correct answers, you do not pass. At most ITD offices, you can retake the test the same day, though you will have to pay the test fee again. Some offices may require you to wait a certain amount of time between attempts, so ask the staff when you receive your score.
Before you retake the test, review the questions you missed. The ITD office staff can show you a printout of your results that lists which questions you answered incorrectly. Use that list to focus your study on those specific topics in the Idaho Driver's Manual. Taking the practice test again and paying attention to the explanations for wrong answers is also a good use of your time between attempts.
There is no limit to how many times you can retake the test, but each attempt costs money. Most people pass on the second attempt if they study the material they missed the first time.
Frequently Asked Questions
Can I take the practice test on my phone?
The official ITD practice test works on phones, tablets, and computers. However, the real test at the ITD office is taken on a desktop computer, so practicing on a computer screen that is similar in size to what you will use on test day may help you feel more comfortable.
How long do I have to pass the written test after I take it?
Your written test score is valid for one year from the date you pass. If you pass the written test but do not take the driving test within that year, you will have to retake the written test. Check with your local ITD office about their specific timeline for scheduling the driving test after you pass the written portion.
Is the practice test exactly the same as the real test?
The practice test covers the same topics and uses the same question format as the real test, but the specific questions are different. The real test draws from a larger pool of questions, so you may see new scenarios on test day. This is why studying the Idaho Driver's Manual itself — not just memorizing practice test answers — is important.
What happens if I fail the written test three times?
Idaho does not impose a limit on how many times you can retake the written test. However, some ITD offices may require you to wait a certain number of days between attempts after multiple failures. Contact your local ITD office to understand their specific policy.
Do I need to pass the written test before I can take the driving test?
Yes. You must pass the written test first. Only after you have a passing score can you schedule the driving test, which is the practical portion where an examiner watches you drive.