Traffic rules, parking and seat belts: Illinois SOS written test practice
19 free practice questions on traffic rules, parking and seat belts for the Illinois SOS written knowledge test, each with the correct answer and a short explanation. Study them here, then check yourself in the interactive quiz or the exam simulator.
1. Children under 2 years of age should generally be:
In a child booster seat
In the front seat with a lap belt
✓ In a rear-facing car seat in the back seat
Facing any direction—at the driver's discretion
Why: Children under 2 years of age must ride in a rear-facing car seat, unless they already weigh 40+ pounds or are taller than 40 inches.
2. Under Illinois child passenger safety law, how must a child under age 2 generally be secured?
In a front-facing car seat
✓ In a rear-facing car seat until they exceed the seat's height or weight limit
With a regular seat belt only
On an adult's lap if the trip is short
Why: Illinois law requires children under age 2 to ride in a rear-facing car seat unless they have outgrown the seat's height or weight limits, and children under 8 must use an appropriate child restraint or booster seat.
3. Illinois' seat belt law requires:
Only the driver to wear a seat belt
Only front-seat occupants to wear seat belts
✓ All occupants, front and back seats, to wear seat belts, and it is primarily enforced
Seat belts are only recommended, not required
Why: Illinois requires all vehicle occupants, in both front and back seats, to wear a seat belt, and this is a primary offense — meaning an officer can stop and ticket a driver for a seat belt violation alone.
4. The recommended following distance from the vehicle ahead under good conditions is:
1 second
✓ 3 seconds
10 seconds
One car length, regardless of speed
Why: The 3-second rule scales with speed, unlike a fixed distance in "car lengths," and allows time to react.
5. Drivers 18 years of age or older may hold a phone in their hand while driving only to:
Talk freely while holding the phone in your hand
✓ With a single tap or swipe, turn on speakerphone or navigation when the phone is mounted in the holder
Texting at a traffic light
Using the Internet while stuck in traffic
Why: The phone must be secured in the holder; you may tap it once to activate speakerphone, but you may not hold or use it in your hand.
6. Under Illinois' graduated licensing rules, drivers under 19 may:
Use a cell phone hands-free only
✓ Not use a cell phone or wireless device at all while driving, except to call 911
Use a cell phone freely once they hold a full license
Text but not call while driving
Why: Illinois bans drivers under 19 from using a cell phone or other wireless device in any way while driving, including hands-free, except to report an emergency.
7. When must headlights be turned on in Illinois?
Only when it is completely dark
✓ From 30 minutes after sunset to 30 minutes before sunrise, and anytime windshield wipers are in use due to rain
Only on highways
Only when requested by law enforcement
Why: Illinois requires headlights from 30 minutes after sunset to 30 minutes before sunrise, and also anytime weather conditions require the use of windshield wipers.
8. At a railroad crossing with flashing signals, you must stop no closer than:
5 feet from the nearest rail
✓ 15 feet from the nearest rail
50 feet from the nearest rail
All you have to do is slow down
Why: Stop at least 15 feet away from the nearest rail and wait until the signals stop flashing and the crossing is safe.
9. In Illinois, U-turns are generally prohibited:
Everywhere in the state
✓ In business districts and anywhere a sign specifically prohibits them
Only on interstates
Only at night
Why: U-turns are not allowed in business districts or wherever a posted sign prohibits them, and drivers must always be able to complete the turn safely without endangering other traffic.
10. How many penalty points does a typical traffic violation—such as speeding—add to a driver's record?
0 points
✓ 1 point
3 points
5 points
Why: Most violations are worth 1 point; more serious ones (reckless driving, DUI, fleeing the scene of an accident) are worth 2 points.
11. After accumulating how many points over a 12-month period can a driver be deemed a “negligent driver” and have their license suspended?
2 points
✓ 4 points
8 points
12 points
Why: The thresholds are as follows: 4 points for 12 months, 6 points for 24 months, or 8 points for 36 months.
12. When another driver honks to signal that they want to pass you, you should:
Speed up so you don't miss it
✓ Maintain your speed (or slow down slightly) and stay in your lane
Pull over to the side of the road
Flash your high beams at him
Why: Allow the driver who is passing you to complete the maneuver safely—do not accelerate or get in their way.
13. Under Illinois' Scott's Law (the Move Over law), drivers approaching a stationary emergency or hazard vehicle with flashing lights must:
Maintain their current speed and lane
✓ Slow down and, if possible, move over one lane away from the vehicle
Only slow down if a police officer is present
Stop completely on the highway
Why: Scott's Law requires drivers to slow down and change lanes away from a stopped emergency or hazard vehicle when safe to do so; violations can bring fines from $250 to $10,000 and license suspension if property damage results, with the law set to expand in 2026 to cover moving emergency vehicles too.
14. A red curb means:
Short-term parking is permitted
✓ Stopping, standing, and parking are prohibited at all times
This is the loading zone for trucks
Parking for people with disabilities only
Why: Red always indicates a complete ban on stopping, standing, and parking—with no exceptions.
15. A blue curb is intended for:
Commercial loading
✓ Vehicles with a valid disability placard or license plate
For taxis only
For buses only
Why: Blue curbs are for vehicles with a disability placard or license plates; parking there without one is a serious violation.
16. When parking uphill on a street with a curb, you should turn the front wheels:
✓ Away from the curb
Toward the curb
Straight
It doesn't matter
Why: Turn the wheels away from the curb so that if the car rolls backward, it will come to rest against the curb.
17. When parking downhill, you should turn the front wheels:
Away from the curb
✓ Toward the curb
Straight
It doesn't matter
Why: Turn the wheels toward the curb so that the car, as it rolls backward, comes to a stop against the curb rather than rolling out onto the roadway.
18. A school bus ahead has stopped with its red lights flashing and stop-arm extended, on a two-lane road with no physical median. You should:
Pass carefully at reduced speed
✓ Stop, regardless of which direction you're traveling, until the lights stop flashing
Stop only if you're behind the bus, not if you're approaching it
Proceed if no children are visible
Why: On undivided roads, traffic in both directions must stop for a school bus with flashing red lights and an extended stop arm, and may only proceed once the lights stop flashing.
19. An emergency vehicle with sirens and flashing lights is approaching from behind. You should:
Speed up to clear the intersection first
✓ Pull over to the right edge of the road and stop until it passes
Stop immediately, wherever you are, even mid-intersection
Ignore it unless it's directly behind you
Why: Move as far right as safely possible and come to a stop (unless a police officer directs otherwise), clearing the way for the emergency vehicle.