South Dakota DPS Permit Practice Test 12
- Questions25
- Correct to pass20
- Passing score80%
- Minimum age14 years
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1. The lane control signal above your lane changes to a steady yellow X. What should you do?
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Answer A: Prepare to leave the lane, because it is about to be closed
A steady yellow X is the warning that the lane below it is about to close, giving drivers time to move over before the red X appears.
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2. You feel drowsy, so you open a window and turn the radio up. What does that achieve?
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Answer B: Very little, because the drowsiness comes back
Cold air and loud music are not sleep, so the alerting effect lasts a minute or two and the driver is soon just as sleepy and closer to a lapse.
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3. You leave a brightly lit service area onto a dark rural road. Why should you slow down for a while?
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Answer C: Your eyes need time to adjust, so at first you see less
Eyes take a few minutes to adapt from bright light to darkness, and during that time you can see much less than your headlights actually show.
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4. Why should you make sure your turn signal has stopped flashing after a lane change?
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Answer A: A signal left flashing tells other drivers that you intend to move again
Other drivers act on your signals, so one that is left on gives them false information about what you are about to do.
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5. What is the correct technique for backing a vehicle straight?
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Answer B: Check behind the vehicle before getting in, then turn and look through the rear window while backing slowly
Mirrors and cameras leave gaps close to the vehicle, so walk behind it first, then turn in your seat for a direct view and keep the speed low enough to stop instantly.
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6. How does alcohol typically affect a driver's vision?
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Answer D: It blurs vision, weakens night vision and narrows attention to the sides
Alcohol slows the eye muscles and the brain's processing of what is seen, degrading focus, night vision, depth perception and awareness of movement at the edges of the field of view.
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7. Traffic is entering the freeway from a ramp ahead of you and you are in the right lane. What should you do?
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Answer C: Move to another lane if it is safe, or adjust your speed to make room
Merging drivers may have little room to adjust. Helping them in by changing lanes or easing your speed prevents conflicts even though they must legally yield to you.
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8. Why should you not rest your foot on the brake pedal as you drive?
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Answer D: The brake lights stay on and the drivers behind cannot read you
Resting on the pedal keeps the brake lights lit and wears the brakes, so following drivers stop believing your brake lights.
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9. You are traveling beside a solid white lane line. What does it tell you?
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Answer B: Crossing it is discouraged or prohibited, so stay in your lane
A solid white line separates lanes going the same direction where lane changing is discouraged or prohibited, such as where a through lane meets a mandatory turn lane.
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10. You are turning left from a one-way street onto another one-way street. Which lane should you use?
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Answer B: Turn from the far left lane into the far left lane of the new street
The general turning rule is to turn from the lane nearest the direction of the turn into the nearest lane of the new roadway, which on a one-way to one-way left turn means far left to far left.
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11. You are joining a highway from a short ramp that has no acceleration lane. What should you do?
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Answer A: Stop or slow at the end of the ramp and wait for a safe gap
Without an acceleration lane there is no room to match speed, so you must yield at the end of the ramp and enter only when a gap allows it.
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12. You want to turn left across the oncoming lane into a shopping center driveway. Who must you yield to?
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Answer B: Oncoming traffic and anyone using the sidewalk
A left turn into a driveway crosses both the oncoming lane and the sidewalk, so you give way to traffic and to pedestrians before completing it.
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13. An ambulance has just gone by and traffic starts to move again. Why should you wait a moment before pulling back out?
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Answer B: Another emergency vehicle may be following the first one
Emergency calls often bring several vehicles, so check that nothing else is coming before you rejoin the traffic lane.
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14. You are driving on an open highway in a strong crosswind. What is the safest adjustment?
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Answer A: Reduce speed and keep a firm grip, expecting gusts on bridges and beside large vehicles
Gusts hit hardest in open gaps, on bridges and when passing high-sided vehicles, so a lower speed and a firm grip let you correct before you are pushed out of your lane.
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15. Why do bridges and overpasses deserve extra caution when temperatures are near freezing?
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Answer A: They lose heat from above and below, so they ice over before the surrounding road
A bridge deck is exposed to cold air on both surfaces and has no ground beneath it to hold heat, so ice can form there while the connecting road is still only wet.
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16. You have a green left-turn arrow but a pedestrian is still walking in the crosswalk you must cross. What should you do?
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Answer B: Wait until the crosswalk is clear before turning
A green arrow protects you from other vehicles, but it never removes the duty to yield to a person already in the crosswalk.
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17. You are approaching a yield sign on a ramp that joins a busy street. What does the sign require?
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Answer A: Slow down, be ready to stop, and let the other traffic go first
A yield sign means you must slow, be prepared to stop and give way to traffic on the road you are entering; a full stop is required only when traffic makes it necessary.
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18. You brake hard on a wet road and need to steer around a stalled car. How do antilock brakes help you do that?
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Answer B: They stop the wheels locking, so the tires can still turn the vehicle
Locked wheels slide and cannot change direction. By preventing lockup the system lets you brake at full force and steer at the same time.
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19. You are stopped at a stop sign on a two-way stop intersection and the cross street has no stop signs at all. What does that mean for you?
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Answer A: You yield to all cross traffic no matter how long that takes
At a two-way stop only your direction is controlled, so there is no taking turns; you wait for a gap big enough to enter safely.
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20. When a funeral procession proceeds together through a red traffic light, what must other drivers do?
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Answer C: Not enter the intersection in a way that crosses the path of the funeral procession
Other drivers may not enter the intersection unless they can do so without crossing the funeral procession's path as it proceeds through together.
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21. The cars in front of and behind your parallel parked car have left you very little room. How do you get out?
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Answer D: Ease back and forth, turning the wheels each way, until you clear
Short movements with the wheels turned first one way and then the other walk the car out of a tight space without touching anything.
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22. You have turned onto a street and see parked cars facing you and headlights coming toward you. What has probably happened?
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Answer C: You have turned the wrong way onto a one-way street
Vehicles parked facing you and headlights approaching in your lane are the classic signs of driving against the flow on a one-way street.
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23. What do white lane lines painted between travel lanes indicate?
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Answer A: Traffic in the adjacent lane moves in the same direction as you
White markings separate lanes carrying traffic in the same direction and mark the right edge of the roadway.
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24. Why is it worth planning your route before a long drive?
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Answer B: So that you are not reading a map or a screen while the car is moving
A driver who knows the route is not navigating at the wheel, which is one of the commonest sources of distraction.
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25. A white arrow painted in your lane points only to the right, and a sign above the lane shows the same movement. What must you do?
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Answer C: Turn right from that lane
Pavement arrows used with lane-use signs are regulatory, so a driver occupying that lane must make the movement shown.