The Illinois knowledge test
Passing score 28 of 35 (80%)
Practice test 35 questions The Illinois Secretary of State sets the passing score at 80% . State rules set 35 questions as the minimum, so the real test may be longer.
Practice by topic
Road Signs What signs mean and what to do when you see them Right-of-Way Who goes first at intersections, crosswalks and roundabouts Traffic Signals Lights, arrows and pedestrian signals Lanes & Turns Lane markings, turns, passing and merging Speed Limits Limits and how to adjust your speed Parking Curb colors, hills and where you can't park Safe Driving Following distance, weather, night driving and sharing the road Alcohol & Drugs Blood alcohol limits, DUI rules and medication Emergencies Breakdowns, emergency vehicles and railroad crossings License Rules Permits, restrictions for new drivers and points Insurance & Collisions Required coverage and what to do after a crash Phones & Distraction Phone rules and other distractions Sample Illinois practice questions
You are passing a horseback rider on an Illinois road. What should you avoid?
Slowing down Sounding your horn Passing with caution Being ready to stop Show the answer
Sounding your horn
A horn can frighten a horse and cause a crash. Be ready to stop when you meet or pass a rider.
Source: Illinois Rules of the Road (2026), Chapter 5, Sharing the Road: Horseback Riders (p. 47)
What is the Illinois minimum liability coverage when one person is hurt or killed in a crash?
$5,000 $15,000 $100,000 $25,000 Show the answer
$25,000
The other minimums are $50,000 for more than one person and $20,000 for another person's property.
Source: Illinois Rules of the Road (2026), Chapter 13, Owning a Vehicle: Mandatory Insurance (p. 98)
You move permanently to Illinois with a valid license from another state that is not about to expire. How long do you have to get an Illinois license?
10 days 90 days One year 30 days Show the answer
90 days
The deadline is 90 days or the expiration of your current license, whichever comes first.
Source: Illinois Rules of the Road (2026), Chapter 1, Illinois Driver's License: Exemptions (p. 5)
Which passengers are exempt from the Illinois rule against drinking alcohol in a vehicle?
Passengers in a school bus Passengers in a taxi Passengers in a limousine Passengers in a pickup truck Show the answer
Passengers in a limousine
Illinois exempts passengers in limousines, chartered non-school buses, motor homes and mini motor homes. The driver is never exempt.
Source: Illinois Rules of the Road (2026), Chapter 6, Driving Under the Influence: Illegal Transportation of Alcoholic Beverages/Open Container (p. 51)
In Illinois, a friend may use your disability placard to park in a reserved space while you stay at home.
Show the answer
False
The authorized holder must be present and must enter or leave the vehicle when the privilege is used.
Source: Illinois Rules of the Road (2026), Chapter 4, Traffic Laws: Parking for Persons with Disabilities (p. 35)
In which direction does traffic move around the central island of an Illinois roundabout?
Counter-clockwise It depends on the time of day Clockwise Either direction Show the answer
Counter-clockwise
Traffic moves counter-clockwise, and you enter by turning right when it is safe.
Source: Illinois Rules of the Road (2026), Chapter 4, Traffic Laws: Rotary and Roundabout (p. 32)
What does a No Turn on Red sign ban at an Illinois signal?
Right turns only, at any light Left turns only, on two-way streets Right turns on red, and lefts between one-way streets All turns, even on a green arrow Show the answer
Right turns on red, and lefts between one-way streets
The sign covers both red-light turns that Illinois otherwise allows. Instead of the word, it may show a red circle.
Source: Illinois Rules of the Road (2026), Chapter 9, Roadway Signs: No Turn on Red (p. 67)
When may you move again after stopping for an Illinois school bus?
After waiting 60 seconds with no children in sight When you no longer see children When the arm and lights are off, or the driver signals As soon as the bus door closes Show the answer
When the arm and lights are off, or the driver signals
Wait until the arm folds in and the lights stop flashing, or until the bus driver waves you past.
Source: Illinois Rules of the Road (2026), Chapter 4, Traffic Laws: School Buses (p. 33)
A yellow X appears above your lane on an Illinois highway. What should you do?
Stop until a green arrow appears Use the lane only to pass Stay in the lane and slow to 20 mph Safely leave the lane before a red X appears Show the answer
Safely leave the lane before a red X appears
A yellow X warns the lane signal will change to red. Never drive in a lane showing a red X.
Source: Illinois Rules of the Road (2026), Chapter 10, Traffic Signals and Pavement Markings: Lane Signals (p. 78)
What does a first DUI conviction mean for an Illinois driver under 21?
A warning letter only Suspension for 30 days Revocation for at least ten years Revocation for at least two years Show the answer
Revocation for at least two years
Drivers under 21 face a minimum two-year revocation for a first DUI conviction.
Source: Illinois Rules of the Road (2026), Chapter 6, Driving Under the Influence: Drivers Under Age 21 (p. 52)
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About these questions
We wrote these practice questions from the facts in the Illinois Rules of the Road (2026 (DSD A 112.47, printed July 2026) edition) and from official sources on road signs. Every answer links to its source, so you can check it and read more.
DMV Decoded is an independent guide, not a government agency. This practice test is not connected to the Illinois Secretary of State, and your actual test will have different questions. Study the handbook, and check the agency's website for current rules.
