South Dakota Permit Practice Test 3
A third full-length South Dakota practice test: 30 more questions with zero repeats from Tests 1 or 2 — including extra South Dakota-specific rules. You need 80% correct to pass the real DPS Knowledge Test.
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. You turn off a busy road into a quiet subdivision in South Dakota and see no speed limit sign on the new street. Your maximum legal speed is now which value?
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Correct answer: D. Once you enter an unposted residential street in South Dakota, the limit drops to the default of 25 mph. Slow down as you turn in; the quiet look of a subdivision hides driveways, cyclists, and children near the pavement.
2. 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.
3. At a BAC of .02, what typical effect does NHTSA list first?
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Correct answer: A. Official NHTSA drunk-driving guidance says .02 Some loss of judgment; relaxation, slight body warmth, altered mood. Testers invent leftover first-skill folklore. Learn that official wording, then answer the knowledge test from those words.
4. An orange triangle with a red border is mounted on the back of a vehicle ahead. What is that vehicle doing?
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Correct answer: B. The slow-moving-vehicle emblem marks farm and other equipment that usually travels 25 mph or less. Give it a wide berth and pass only when you can see far enough ahead. Orange triangle equals slow vehicle.
5. What is the three-second following rule in good weather?
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Correct answer: A. Pick a fixed mark. When the car ahead passes it, count one-thousand-one, two, three. You should not reach the mark sooner. That gap grows with speed. Double it in rain; triple it on ice. Testers treat this as the core distance question.
6. An officer in South Dakota stops a driver who is 18. A test shows a very small amount of alcohol. The under-21 threshold that can trigger a violation is:
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Correct answer: C. Under-21 drivers in South Dakota are not judged by the adult 0.08%-style line. The threshold is 0.02%. That is why testers keep asking the youth number separately from the adult number.
7. In South Dakota, a driver who is 21 or older commits a per-se drunk-driving offense once their blood alcohol concentration reaches which level?
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Correct answer: B. 'Per se' means the number alone proves the offense. In South Dakota, that number is 0.08%. No other proof of bad driving is needed at that level, and alcohol can still impair you below it.
8. A tire blows out at highway speed. What should you do first?
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Correct answer: B. A blowout pulls the car; your job is to keep it pointed straight while speed drops. Hard braking can spin you. Once you are slow and under control, signal and move off the pavement. Hold, ease, then brake.
9. A classmate in South Dakota claims the adult DUI line is 0.10%. The official per-se BAC for drivers 21 and older is which value?
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Correct answer: C. Your classmate is using an outdated number. South Dakota treats 0.08% as the adult per-se line. Memorize the current figure from the official handbook, not a rumor from an older relative.
10. Ahead of a raised concrete median you see a white sign reading KEEP RIGHT with an arrow curving to the right. What should you do?
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Correct answer: A. KEEP RIGHT tells you the roadway splits around an island, median, or obstruction, and all traffic must pass on the right side. Passing left would put you into oncoming lanes. Follow the arrow around the obstacle, then continue straight.
11. During which hours may a South Dakota restricted minor's permit holder drive alone?
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Correct answer: B. A South Dakota restricted minor's permit allows solo driving from 6 a.m. to 10 p.m. with a parent's permission. Late-night crash risk is highest for new drivers, so overnight trips need a parent or guardian in the seat beside you.
12. Why is it illegal to park on a sidewalk or in a crosswalk?
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Correct answer: B. Sidewalks and crosswalks are reserved walking space; a parked car there pushes pedestrians, strollers, and wheelchairs out into traffic lanes. The law keeps walking paths continuous and safe. If people walk there, your car does not belong there.
13. A yellow diamond shows two arrows pointing toward each other. What conflict is ahead?
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Correct answer: A. The two-way traffic warning tells you opposing cars will soon share the road, often after a divided or one-way segment. Keep right and expect headlights in the other lane. Two arrows, two directions.
14. How does official NHTSA impaired-driving guidance define zero tolerance for underage drivers?
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Correct answer: A. Official NHTSA Uniform Guidelines for State Highway Safety Programs list Zero Tolerance for underage drivers, making it illegal “per se” for people under age 21 to drive with any measurable amount of alcohol in their system (i.e., .02 BAC or greater). State numbers still vary; this leftover uses that official national guideline sentence.
15. Which occupants must wear a seat belt under South Dakota's requirement covering young riders?
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Correct answer: B. South Dakota requires everyone under 18 to buckle up in the front and back seats alike. Unbelted rear riders become projectiles in a crash, endangering themselves and people ahead of them. Buckle every seat, every trip.
16. What supervision does NHTSA require during the learner’s permit phase?
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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. The leftover front-seat-only sentence is not on that page; this nearby official supervision rule is. Learn that official wording, then answer the knowledge test from those words.
17. One sign shape is so important that it is reserved for a single message: STOP. Which shape is it?
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Correct answer: B. The eight-sided octagon belongs to the stop sign alone, so you can recognize a stop even when the face is snow-covered or faded. Count eight sides, prepare to stop. No other sign may borrow this shape.
18. Pedestrians, bicyclists, and other drivers are still in a South Dakota intersection as your light turns green. Who goes first?
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Correct answer: A. South Dakota reminds you that pedestrians, bicyclists, and other drivers who are still in the intersection keep moving first. A fresh green does not erase them. This sits next to the funeral-procession chapter because both are “do not jump the line” rules.
19. It is late at night and the unposted residential streets in your South Dakota neighborhood are empty. The legal maximum for these streets remains which speed?
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Correct answer: C. Empty or busy, day or night, the default limit on unposted residential streets in South Dakota stays 25 mph. Darkness actually cuts how far you can see and react, so conditions may call for less, not more, than the limit.
20. What first responsible-driver step does NHTSA list if you plan to drink?
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Correct answer: A. Official NHTSA drunk-driving guidance says Plan your safe ride home before you start the party, choose a non-drinking friend as a designated driver. If you drink, do not drive for any reason.
21. You and another driver stop at a four-way stop at exactly the same time, and the other car is on your right. What should you do?
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Correct answer: D. When two drivers stop at the same moment, the driver on the left yields to the driver on the right. This tiebreaker gives everyone the same answer without guessing. Remember the phrase: right goes right away.
22. You are making a study calendar for the South Dakota knowledge test. You can hold a learner's permit beginning at which age?
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Correct answer: B. Put 14 on the calendar for South Dakota. That is the first legal day for a learner's permit, after you pass the knowledge and vision screens the DPS requires.
23. You are in the right lane when you see a yellow diamond sign showing the right lane narrowing into the left lane. What should you do?
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Correct answer: B. A lane-ends sign warns your lane will disappear, so signal, match the other lane's speed, and merge before the pavement runs out. Drivers in the ending lane must yield to through traffic. Early, smooth merges prevent the last-second squeeze.
24. While planning a road trip across South Dakota, you look up the fastest speed any of its highways allow. What is that statewide maximum?
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Correct answer: A. South Dakota's top speed limit is 80 mph, found only on its fastest designated highways. Expect lower posted limits on most stretches, and remember signs control: the maximum applies only where a sign actually posts it.
25. What space does NHTSA tell you to give a speeding driver?
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Correct answer: A. Official NHTSA speeding guidance says Give speeding drivers plenty of space. Speeding drivers may lose control of their vehicle more easily. The leftover slow-vehicle-blocks-flow sentence is not on that page; this nearby official space rule is.
26. An emergency vehicle is coming up behind you with lights and siren on a two-lane street. What should you do?
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Correct answer: B. Pull to the right and stop, clearing the lane. If you are in an intersection, clear it first, then pull over. Do not slam-stop in the path. Lights and siren mean yield the road, not freeze in the middle.
27. Unless a sign posts another limit, the usual residential or city default in South Dakota is:
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Correct answer: A. South Dakota's typical unposted residential / city default is 25 mph. School zones and work zones drop lower. If houses line the street and no sign argues, start at 25 mph and watch the next plaque.
28. A traffic light is circular yellow after you have already entered the intersection on green. What should you do?
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Correct answer: B. Once you are in the intersection on green, a yellow that follows means finish the crossing smoothly. Stopping mid-box blocks others and can get you hit from behind. Yellow before the line means stop if you can; yellow after the line means clear out.
29. Traffic around you on a South Dakota highway posted at the state maximum starts flowing faster than the signs allow. Your personal legal limit remains which speed?
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Correct answer: C. Other drivers speeding does not raise your limit; on South Dakota's fastest highways it stays 80 mph. Move right and let them pass instead of matching them. Speed limits bind each driver individually, whatever the surrounding traffic does.
30. What does the term "no-zone" mean when you drive near a large truck?
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Correct answer: C. No-zones are the huge blind spots in front of, behind, and beside a large truck where the driver simply cannot see you. A quick test: if you cannot see the driver's face in the truck's mirror, you are invisible.
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