What the Idaho written test covers and how it works
Idaho's written driving test is a 40-question multiple-choice exam that covers road signs, traffic laws, safe driving practices, and what to do in emergency situations. You need to answer at least 32 questions correctly to pass. The test is administered at your local Idaho Department of Transportation (ITD) office when you go in person to take it—there is no online version of the actual exam, though you can study online beforehand.
The questions come from the Idaho Driver's Manual, which is the official source document for everything tested. The manual covers right-of-way rules, speed limits, parking, lane changes, what different road signs mean, how to handle skids and hydroplaning, and rules about following distance and turning. Every question on the test is drawn directly from material in that manual.
You take the test on a computer at the ITD office. The questions appear one at a time, and you select your answer from four choices. You cannot go back to change an answer once you move forward. The test takes most people 20 to 30 minutes to complete.
Key Takeaways
- The Idaho written test has 40 questions, you must answer 32 correctly to pass, and every question comes from the official Idaho Driver's Manual.
- You take the test in person at an ITD office on a computer, and you cannot return to previous questions to change your answers.
- The test covers road signs, traffic laws, right-of-way, safe driving practices, and emergency procedures—all topics found in the Driver's Manual.
- You can study the Driver's Manual online for free on the ITD website before you go in to take the test.
- Practice tests available online can help you get used to the format and question style, but the actual test questions are not published in advance.
Where to find the official Idaho Driver's Manual
The Idaho Driver's Manual is available for free on the ITD website at itd.idaho.gov. You can read it online or read it as a PDF to your computer or phone. The manual is organized by topic—road signs are grouped together, traffic laws are grouped together, and so on—which makes it easier to study one subject at a time.
The manual is also available in print. You can pick up a physical copy at any ITD office when you visit to take your test, or you can request one by mail through the ITD website. Some libraries and high schools also keep copies on hand.
The manual is updated periodically when Idaho traffic laws change, so if you are studying from an older version, check the ITD website to see if a newer edition has been released. The version number and date are printed on the cover.
How to study the manual effectively
Start by reading through the entire manual once to get a sense of what topics are covered. Then go back and focus on the sections that are most likely to appear on the test: road signs, right-of-way rules, speed limits, and what to do in emergency situations. These topics make up a large portion of the 40 questions.
As you read, write down or highlight the rules that seem important or that you find confusing. Pay special attention to situations described in the manual—for example, "when two cars arrive at a four-way stop at the same time, the car on the right has the right of way." These specific scenarios often appear as test questions.
Read the road sign section carefully and try to memorize what each sign means and what action drivers should take. Road signs make up a significant number of questions on the test. If the manual shows a picture of a sign, study that picture and the description together.
Using practice tests to prepare
Practice tests are available online through several websites and apps. These are not official ITD tests, but they are designed to mimic the format and difficulty of the real exam. Taking a practice test helps you get used to answering multiple-choice questions under time pressure and shows you which topics you need to study more.
When you take a practice test, treat it like the real thing: do not look at the answers until you finish, do not go back to change answers, and try to complete it in one sitting. After you finish, review the questions you got wrong and look up the correct answer in the Driver's Manual. Understanding why an answer is wrong is more valuable than just knowing the right answer.
Practice tests are a study tool, not a substitute for reading the manual. The actual test questions are not published in advance, so a practice test can only approximate what you will see. Use practice tests to identify weak areas, then go back to the manual to study those topics more thoroughly.
What to bring and expect on test day
Bring a valid form of identification—a passport, birth certificate, or state ID card. You will also need to bring proof of your Social Security number, such as a Social Security card or a tax return. Bring proof of your Idaho residency, such as a utility bill, lease, or bank statement with your name and address on it. Check the ITD website for the complete list of acceptable documents before you go, because requirements can vary slightly.
Arrive at the ITD office at least 15 minutes before your scheduled appointment. You will fill out an process form and pay a fee—the fee amount varies depending on what type of license you are getting, so check the ITD website for the current cost. The staff will then direct you to a computer to take the test.
You will not be allowed to use your phone, notes, or any other materials during the test. The testing area is monitored. If you fail the test, you can retake it, but you will have to pay the fee again and wait for another appointment. Most ITD offices allow you to schedule a retake the same day or within a few days.
Common mistakes to avoid on the test
Do not rush through questions. You have plenty of time to read each question carefully and think about the answer. Many test-takers choose the first answer that sounds right without reading all four options. The wrong answers are often designed to catch people who are not paying close attention.
Do not assume you know the answer based on what you think is common sense. Idaho traffic laws may differ from what you have seen in other states or what you think is logical. Stick to what the Driver's Manual says, not what you think should be true.
Do not skip studying any section of the manual because you think it will not be on the test. The test covers the entire manual, and you cannot predict which topics will appear. Road signs, parking rules, and emergency procedures are all fair game.
What happens after you pass the written test
Once you pass the written test, you will receive a permit that allows you to practice driving. If you are under 18, you will be subject to Idaho's graduated driver licensing rules, which restrict when and where you can drive. If you are 18 or older, you can move on to the road test.
The road test is a separate exam where an ITD examiner rides with you and watches you drive. You will need to schedule this test at an ITD office. The road test covers your ability to control the vehicle, follow traffic laws, and respond safely to road conditions. Passing the written test does not may provide you will pass the road test—they measure different skills.
After you pass both the written and road tests, you will be issued an Idaho driver's license. The license is valid for four years if you are under 21, and eight years if you are 21 or older.
Frequently Asked Questions
Can I take the Idaho written test online from home?
No. The actual test must be taken in person at an ITD office on a computer provided by the office. You can study online using the free Driver's Manual and practice tests, but the official exam is only given at ITD locations.
How many times can I retake the written test if I fail?
Idaho does not set a limit on the number of times you can retake the test. However, you must pay the fee each time you take it, and you will need to schedule a new appointment. Most people pass on the second attempt if they study the material they missed the first time.
Is the written test the same for all types of Idaho licenses?
The basic written test is the same for standard driver's licenses. If you are getting a commercial driver's license (CDL), there is a separate, more difficult test that covers additional rules for large vehicles. Check with your local ITD office to confirm which test you need.
What if I do not pass the written test on my first try?
You can retake the test as soon as you schedule another appointment at an ITD office. Between attempts, review the Driver's Manual sections that cover the questions you got wrong. Many ITD offices can tell you which topics you missed, which helps you focus your study time.
Do I need to study if I have driven in another state?
Yes. Even if you have a valid driver's license from another state, Idaho traffic laws and road signs may be different. Study the Idaho Driver's Manual to learn the specific rules that explore in Idaho. The test is designed to make sure you understand Idaho's laws, not just that you can drive.