Illinois Permit Practice Test 4
A fourth full-length Illinois practice test: 30 more questions with zero repeats from Tests 1–3 — including extra Illinois-specific rules. The real SOS Written exam (traffic laws and traffic sign identification) has 35 questions, and you need 28 correct (80%) to pass.
Tap an answer. The explanation opens so you can learn it, then go on. Keyboard: A–D or 1–4 to answer, then Enter or Space.
Question 1 of 30
1. On a school day in Illinois, children are present near a posted school zone. What is the maximum speed you may drive while passing it?
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Correct answer: A. Illinois caps speed at 20 mph in posted school zones on school days when children are present and close enough to be at risk. The slower speed buys stopping distance around kids. Hook: two-zero around the schoolyard.
2. A vehicle in front of you is stalled on railroad tracks and will not restart. The crossing lights start to flash. What should you do?
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Correct answer: B. People beat cars. Evacuate at once and run toward the train at an angle so debris is less likely to hit you if the car is struck. Do not stand on the tracks. Restart attempts end when the lights start.
3. How does NHTSA say a lap and shoulder belt should sit?
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Correct answer: A. Official NHTSA seat-belt guidance says Place the shoulder belt across the middle of your chest and away from your neck. The lap belt rests across your hips, not your stomach. NEVER put the shoulder belt behind your back or under an arm.
4. A school bus stops on a two-lane Illinois road with its stop arm out and red lights flashing while you approach from the opposite direction. What must you do?
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Correct answer: C. On Illinois roads, traffic in both directions must stop for a school bus loading or unloading with its signals active; only on highways of four or more lanes may opposite-direction traffic continue. Hook: two lanes means everybody stops.
5. You approach an intersection with no signs or signals, and another vehicle approaches from a cross street at about the same time. Who should yield?
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Correct answer: A. At an uncontrolled intersection, slow down and yield to any vehicle that reaches it at about the same time from your right. Without signs, this default rule sorts out conflicts. Same tiebreaker as a four-way stop: right goes first.
6. An orange sign with a black arrow reads DETOUR. What is this sign telling you?
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Correct answer: A. Detour signs guide you along a temporary route when the normal road is closed, often for construction or an emergency. Keep following the arrows until the detour ends, and the route will return you to your original road.
7. What penalties does NHTSA list for impaired driving?
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Correct answer: A. Official NHTSA drunk-driving guidance says penalties for impaired driving can include driver’s license revocation, fines, and jail time. The leftover implied-consent chemical-test sentence is not on that page; this nearby official penalty list is.
8. How much of a traffic lane is a motorcycle entitled to use?
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Correct answer: D. A motorcycle is entitled to a complete traffic lane, and you may not squeeze past one inside that lane. Riders need the full width to dodge hazards. Treat a motorcycle's lane like a car's lane: whole and off-limits.
9. You see a white square sign showing a curved U-shaped arrow inside a red circle with a slash through it. What is prohibited?
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Correct answer: B. The slashed U-arrow bans U-turns at that location, usually because oncoming drivers cannot see you turn around in time. Continue to a spot where reversing direction is legal and safe. Red circle plus slash means the pictured move is forbidden.
10. What is double parking, and why is it against the rules?
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Correct answer: D. Double parking means standing or parking in the roadway alongside a vehicle already parked at the curb. It blocks a travel lane, hides pedestrians, and pins in the parked car, so the practice is prohibited on public streets.
11. A teen walks into a Illinois Secretary of State (SOS) office in Illinois to apply for a first learner's permit. The office can accept the application once the teen is what age?
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Correct answer: B. The SOS accepts learner's permit applications at age 15 in Illinois. Bring proof of identity, residency, and usually a parent's signature, then pass the knowledge and vision screenings. Age is simply the first box to check.
12. A yellow diamond shows a sideways wind-sock or windswept tree. What risk is ahead?
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Correct answer: A. Crosswind warnings mark bridges, cuts, and open plains where gusts shove vans, trucks, and empty trailers. Ease off the gas and keep both hands on the wheel. If you drive something tall, treat the sign as a speed cut.
13. You are delivering food to a house on an unposted residential street in Illinois. Unless a sign changes it, what speed limit applies?
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Correct answer: A. Unposted residential streets in Illinois carry a default limit of 30 mph (urban district default; 15 mph in alleys). The rule exists so drivers can stop for the unexpected, like a car backing out of a driveway. When a sign is posted, obey the sign instead.
14. Which parking spot is illegal no matter how briefly you plan to stay?
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Correct answer: D. Parking within the cleared space around a fire hydrant is illegal, because firefighters may need instant access to connect hoses. Blocking a hydrant can cost lives during a fire. If you see a hydrant, leave the whole area open.
15. At a crosswalk signal, what is the difference between the walking-person symbol and the raised-hand symbol?
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Correct answer: C. The walking-person symbol invites pedestrians to begin crossing, while the raised hand warns them not to start; a flashing hand means finish crossing if already in the street. Drivers should expect people in the crosswalk during these phases.
16. After two drinks at a barbecue in Illinois, you consider driving home. For a driver 21 or older, that becomes illegal starting at which BAC?
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Correct answer: A. Driving in Illinois becomes a per-se DUI at a BAC of 0.08%. Drinks affect people differently, so you cannot reliably guess your number. When you have been drinking, the smart decision is simply to skip driving.
17. Which sign shape and color combination marks an interstate route?
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Correct answer: D. Interstate routes are marked by a shield split into a red band on top and a blue field below, with white numbers. Spotting the shield quickly helps you follow or avoid a freeway. Shield equals interstate.
18. A parent in Illinois wants to start permit practice as soon as the law allows. The earliest learner's-permit age is:
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Correct answer: C. Illinois opens the learner's-permit door at 15. Starting then, with a supervising adult, is how GDL is supposed to work. Younger than that, the answer is still wait.
19. What is the highest posted highway speed limit in Illinois?
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Correct answer: A. Illinois's highest posted highway limit is 70 mph (interstate highways). Most stretches are lower, and work zones or weather can cut it further. Do not assume every freeway in Illinois is signed at the state maximum.
20. You are passing a slow truck on a Illinois highway posted at the state's maximum limit. Even while passing, your legal ceiling stays at which speed?
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Correct answer: B. Passing grants zero extra speed allowance; in Illinois the ceiling on those top-posted highways stays 70 mph (interstate highways). If you cannot complete the pass within the limit, wait for a better gap. The limit binds every maneuver.
21. Children are playing near the curb on an unposted neighborhood street in Illinois. Unless a sign says otherwise, the fastest you may legally drive here is which speed?
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Correct answer: A. The default residential limit in Illinois is 30 mph (urban district default; 15 mph in alleys) unless otherwise posted. With children nearby, you should often go slower still, because stopping distance grows quickly with speed and kids can dart into the street without warning.
22. What fee does the Illinois Rules of the Road list for a Driver’s License/Permit Instruction Permit?
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Correct answer: A. The Illinois Rules of the Road fee table lists Driver’s License/Permit Instruction Permit $20. Fees can change; confirm the number at the SOS facility the day you go.
23. What driving does NHTSA say a learner’s permit allows?
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Correct answer: A. Official NHTSA GDL guidance says A learner’s permit allows driving only while supervised by a fully licensed driver. An intermediate license allows unsupervised driving under certain restrictions. The leftover solo-practice claim is not on that page.
24. How does the alcohol in a regular beer compare with a standard glass of wine or a single shot of liquor?
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Correct answer: B. A standard beer, glass of wine, and shot of liquor each deliver about the same alcohol, so switching drinks does not protect you. Your body counts drinks, not drink types. One is one, whatever the glass looks like.
25. The light is steady green as you reach an intersection. Which statement is true?
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Correct answer: B. A green light means you may proceed, but only after yielding to pedestrians and vehicles still clearing the intersection. Green grants permission, not protection, so look left, right, and left again before you enter.
26. Signs on Illinois highways vary from road to road, but the law sets one absolute top limit for the fastest routes. That limit is which value?
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Correct answer: D. By statute, 70 mph (interstate highways) is the fastest any Illinois road can be posted. Below that ceiling, engineers set each road's limit for its design and traffic, which is why the posted sign on your road governs.
27. What does a posted speed limit actually tell you?
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Correct answer: A. A posted limit is the top legal speed when conditions are ideal: dry pavement, good visibility, light traffic. In worse conditions, a safe speed is lower. Treat the number as a ceiling to stay under, not a target to hit.
28. Drivers under 21 in Illinois are held to a stricter alcohol standard than adults. What is the BAC threshold for these younger drivers?
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Correct answer: B. Adults have a higher per-se number, but the under-21 standard in Illinois is any detectable amount. Alcohol is already off-limits for minors, so the driving rule matches: for young drivers, the practical limit is zero drinks.
29. A yellow diamond sign shows a side lane curving in to join the main road ahead. You are on the main road. What does the sign mean?
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Correct answer: C. A merge sign warns that another roadway joins yours ahead. Entering drivers must yield, but you should adjust your speed or change lanes when safe to open a gap. Merging works best when both drivers cooperate like a zipper.
30. How much stopping room does FMCSA say large trucks and buses need?
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Correct answer: A. Official FMCSA passenger-vehicle guidance says Large trucks and buses need the length of up to two football fields to safely stop. Leave extra space when merging in front of these large vehicles, to give them the stopping space they need.
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