How to Pass the Illinois DMV Test

Illinois calls its driver licensing agency the Secretary of State (SOS), not the DMV. The written knowledge test has 35 questions split into two distinct parts: 15 traffic sign identification questions and 20 rules-of-the-road questions. You need an overall score of 80% — at least 28 correct — to pass. Illinois also offers the test in 10 languages and uses the 'Rules of the Road' handbook as its official study guide. Here is how to prepare.

Quick Facts: Illinois DMV Test

Number of questions: 35 (15 signs + 20 rules of the road)
Passing score: 80% (28 out of 35)
Test fee: $20 (instruction permit)
Test format: Computer-based, in-person only, 10 languages
Retake policy: Same day or next day; 3 attempts per year
Official handbook: Illinois Rules of the Road

Study Strategies

✓Get the free 'Illinois Rules of the Road' handbook from any Secretary of State facility or download it from ilsos.gov. This is the only source material for the test — every question comes from this handbook.
✓Study the sign identification section separately. The first 15 questions test your ability to identify signs by shape, color, and meaning. Make flashcards for regulatory, warning, and guide signs.
✓Focus on the rules-of-the-road section, which includes true/false questions. Read carefully — true/false questions with words like 'always' or 'never' are often false.
✓Review Illinois-specific GDL (Graduated Driver Licensing) rules: 50 hours supervised driving, 10 at night, nighttime curfew, and passenger restrictions for under-18 drivers.
✓Take practice tests that mirror the two-part format. Many online practice tests only test rules of the road — make sure you also practice sign identification.

Most Commonly Missed Topics

Traffic sign shapes and colors

Illinois tests sign identification heavily. Know that an octagon is always stop, an inverted triangle is yield, a pentagon indicates a school zone, and a round sign warns of a railroad crossing. Color matters too: red means stop/prohibition, yellow means warning, orange means construction, green means guide information.

Stopping distances and following distance

At 55 mph, total stopping distance (perception + reaction + braking) is about 400 feet. Illinois recommends a 3-second following distance, increasing in bad weather. Questions about specific stopping distances at different speeds are common.

Illinois speed limits

Default speed limits in Illinois: 30 mph in urban areas, 55 mph on non-interstate highways, 65 mph on interstates (70 mph on some rural interstates). School zones are 20 mph on school days when children are present. Alley speed is 15 mph.

Emergency vehicle rules

When an emergency vehicle approaches with sirens and flashing lights, pull to the right edge of the road and stop. Do not block intersections. Illinois's Scott's Law (Move Over Law) requires you to change lanes or slow down when passing stopped emergency vehicles.

Lane usage and passing rules

You may not pass on the right except on multi-lane roads or when the vehicle ahead is turning left. Never pass on a hill, curve, or within 100 feet of an intersection or railroad crossing. These passing restrictions are frequently tested.

Parking rules

In Illinois, you cannot park within 15 feet of a fire hydrant, 20 feet of a crosswalk, 30 feet of a stop sign or traffic signal, or 50 feet of a railroad crossing. These specific distances appear on nearly every test.

What to Expect on Test Day

Visit any Illinois Secretary of State Driver Services facility — walk-ins are accepted at all locations, and some offer appointments to reduce wait times. After your documents are verified and the $20 permit fee is paid, you will take a vision screening.

The written test follows in two parts. Part 1 is 15 traffic sign identification questions. Part 2 is 20 rules-of-the-road questions, which may be multiple-choice or true/false. Both parts are taken on a computer terminal. There is no time limit.

Results appear immediately. If you pass with 28 or more correct answers (80%), you receive your instruction permit that day. If you fail, you may be able to retake the same day (if slots are available) or the next day. You get up to 3 attempts per year.

What to Bring

●Proof of identity (birth certificate, passport, or permanent resident card)
●Social Security card
●Proof of Illinois residency (utility bill, bank statement, lease agreement)
●Proof of written signature (credit card, canceled check)
●Parental consent form (if under 18)
●$20 instruction permit fee

How the Test Is Administered

The Illinois knowledge test is computer-based, taken at Secretary of State Driver Services facilities across the state. The test has two parts: 15 sign identification questions and 20 rules-of-the-road questions. Some rules-of-the-road questions are true/false format. The test is available in 10 languages: English, Spanish, Polish, Chinese, Korean, Arabic, French, Hindi, Russian, and Urdu. Audio assistance is available. There is no time limit, and results are displayed immediately on screen. Illinois does not offer online testing.

Managing Test Anxiety

✓The 80% passing score means you can miss up to 7 questions across both sections. That is a reasonable margin — focus on getting the easier questions right rather than stressing over hard ones.
✓Treat the sign section as a quick win. If you have studied sign shapes and colors, you should be able to answer most of the 15 sign questions confidently, giving you a strong foundation before the rules section.
✓Illinois allows walk-ins at all locations, which means you can go early in the morning when offices are less crowded and wait times are shorter.
✓If you fail, you can try again the same day at some facilities. Do not panic — treat it as a free practice attempt and learn from the questions you missed.
✓Remember that the rules section includes true/false questions. These are generally easier than multiple-choice. Look for absolute words like 'always' and 'never' — these statements are often false.

Ready to Practice?

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