South Carolina Driver License: Speed, Space, Communicating, Avoiding Collisions and Malfunctions

30 questions with the correct answer and an explanation for each. Topic: Speed, Space, Communicating, Avoiding Collisions and Malfunctions. Free, no account needed.

1. How far down the road should you typically be looking while driving to give yourself time to adjust and avoid emergency braking or steering?

4 to 6 seconds ahead
20 to 30 seconds ahead
About one car length per 10 mph of speed
8 to 10 seconds ahead

Answer: B — 20 to 30 seconds ahead

Looking that far ahead gives time to spot problems and react smoothly instead of braking or steering suddenly.

2. A driver stays directly behind a large truck for an extended stretch of road. What problem does this create?

It increases the chance of hydroplaning
It blinds the driver's rearview mirror
It shortens how far ahead the driver can see
It makes the driver's own brake lights harder for others to see

Answer: C — It shortens how far ahead the driver can see

Following behind a large vehicle blocks the driver's view of the road ahead.

3. When should a driver especially rely on mirrors to check traffic behind?

Before changing lanes, slowing, stopping or entering an intersection
Only when driving in reverse
Only when driving on a multi-lane highway
Only before turning at a red light

Answer: A — Before changing lanes, slowing, stopping or entering an intersection

These are the moments named as needing extra mirror checks for traffic behind.

4. What visual habit should a driver use while scanning the road ahead?

Fix the eyes on the car directly ahead
Focus mainly on the rearview mirror
Stare at the center line to stay in the lane
Keep the eyes moving rather than staring at one spot

Answer: D — Keep the eyes moving rather than staring at one spot

A moving search pattern catches hazards from all directions instead of tunnel vision on one point.

5. A driver is approaching a curve and cannot see where it ends. What should the driver do?

Maintain the current speed and coast through
Speed up slightly to clear the curve quickly
Slow down before entering the curve
Brake hard while turning through the curve

Answer: C — Slow down before entering the curve

Slowing before the curve, especially when its end is not visible, avoids losing traction mid-curve.

6. While driving in heavy rain over standing water, a vehicle's steering tires begin riding on top of the water and steering response fades. What is happening and what should the driver do?

A skid from a sudden stop; accelerate to regain traction
A blowout; grip the wheel and keep straight
Hydroplaning; slow down
Brake fade; pump the brakes

Answer: C — Hydroplaning; slow down

Hydroplaning is tires riding on a water layer, and the remedy is slowing down.

7. About how much water on a roadway is enough to reach the bottom of most cars and possibly stall the engine or cause loss of control?

Six inches
Three inches
Two feet
One foot

Answer: A — Six inches

Six inches of water is enough to reach the underside of most cars, stalling them or affecting control.

8. About how much moving water is enough to carry away most vehicles, including SUVs and pickups?

Two feet
One foot
Three feet
Six inches

Answer: A — Two feet

Two feet of moving water can sweep away most vehicles, even larger ones.

9. About how long does it take an alert driver to recognize the need to stop, before the foot even begins moving toward the brake?

2 to 3 seconds
¾ second to 1 second
4 seconds
About ¼ second

Answer: B — ¾ second to 1 second

This recognition period, perception time, averages ¾ to 1 second for an alert driver.

10. About how long does it take to move the foot from the accelerator to the brake pedal after recognizing the need to stop?

¾ second to 1 second
2 seconds
About ¼ second
4 seconds

Answer: A — ¾ second to 1 second

This movement of the foot to the brake, reaction time, averages another ¾ to 1 second.

11. About how far does a vehicle travel just from braking (not counting perception or reaction) after braking from 50 mph on dry pavement with good brakes?

About 258 feet
About 100 feet
About 58 feet
About 158 feet

Answer: D — About 158 feet

Braking distance from 50 mph on dry pavement with good brakes is about 158 feet.

12. A driver sees a child dart toward the road and takes a moment to realize a stop is needed, before the foot even moves toward the brake pedal. Which part of total stopping distance is this?

Braking distance
Reaction time
Following distance
Perception time

Answer: D — Perception time

Recognizing the need to stop, before moving the foot to the brake, is perception time.

13. What is the recommended minimum following distance behind the vehicle ahead under normal conditions?

Four seconds
Two seconds
One second per 10 mph of speed
One car length

Answer: A — Four seconds

A four-second gap, counted from a fixed point, is the recommended minimum.

14. While checking following distance, a driver's car reaches the fixed point the vehicle ahead just passed before the driver finishes counting to four. What does this mean, and what should the driver do?

The driver is following too closely and should slow down and recount
The driver should tap the horn to warn the vehicle ahead
The following distance is fine and no action is needed
The driver is too far back and should speed up

Answer: A — The driver is following too closely and should slow down and recount

Reaching the point before finishing the count means the gap is under four seconds, so the driver should slow and recheck.

15. In which conditions should a driver increase following distance beyond the standard four seconds?

Only when carrying extra passengers
At night, in fog, or on slippery roads
Only when driving an unfamiliar rental car
Only in daylight on dry highways

Answer: B — At night, in fog, or on slippery roads

Reduced visibility or traction conditions call for a longer following gap.

16. A driver is following a school bus that must stop at every railroad crossing. What should the driver do?

Leave extra following distance
Move alongside the bus and stay there through the crossing
Follow closely to save time
Pass the bus just before the crossing

Answer: A — Leave extra following distance

Vehicles required to stop at railroad crossings, including school buses, call for extra space behind them.

17. A tractor-trailer is passing a car on the highway. What should the driver of the car do?

Speed up to pass the truck back
Move to the outer part of the lane, away from the truck
Brake hard so the truck passes quickly
Move closer to the center line, toward the truck

Answer: B — Move to the outer part of the lane, away from the truck

Moving to the far side of the lane gives clearance from the passing truck.

18. When is it especially important to use headlights, even during daytime?

Only during heavy traffic in cities
Only at night above 45 mph
On rainy, snowy or foggy days, and when driving away from a rising or setting sun
Only when driving on rural highways

Answer: C — On rainy, snowy or foggy days, and when driving away from a rising or setting sun

Headlights help others see you in poor-visibility weather, at dusk, and when driving away from low sun.

19. A pedestrian near the roadway looks like they may step into a driver's lane without noticing the car. What is an appropriate use of the horn in this case?

A light tap to alert the pedestrian
Multiple rapid honks to express frustration
A long continuous blast to scare them off the road
Wait until the pedestrian is in the lane, then sound the horn

Answer: A — A light tap to alert the pedestrian

A light tap is enough to alert someone who may be about to enter the lane.

20. How much distance before a lane change, turn or merge does the law require a driver to signal?

20 feet
100 feet or more
50 feet
300 feet

Answer: B — 100 feet or more

State law requires signaling 100 feet or more before the maneuver.

21. A driver plans to turn off the road at a spot with no turn or exit lane. What should the driver do before slowing down?

Tap the horn instead of signaling
Rely on the brake lights instead of signaling
Brake hard immediately without signaling
Signal before reducing speed

Answer: D — Signal before reducing speed

Signaling before slowing warns following drivers in advance, since brake lights alone may come too late here.

22. What are the three basic options a driver has to avoid a collision in an emergency?

Braking, steering and accelerating
Steering, signaling and parking
Braking, honking and flashing lights
Accelerating, honking and braking only

Answer: A — Braking, steering and accelerating

These are named as the three ways to respond to an emergency situation.

23. A vehicle equipped with ABS begins braking hard in an emergency, the pedal vibrates and clicks. What should the driver do?

Release the brake completely and coast to a stop
Pump the brakes gently every second
Press the pedal hard and hold constant pressure without pumping
Pump the brake pedal rapidly to reset the ABS

Answer: C — Press the pedal hard and hold constant pressure without pumping

ABS should be used with steady, hard pressure; pumping deactivates it, and the vibration is normal.

24. A driver needs to steer around an obstacle suddenly in the road. What is the correct technique?

Turn the wheel with one hand while braking hard at the same time
Steer around the obstacle, then brake hard to straighten the vehicle
Steer away from the obstacle and keep steering in that direction without straightening
Grip the wheel with both hands, steer where you want to go, then steer the other way to straighten out

Answer: D — Grip the wheel with both hands, steer where you want to go, then steer the other way to straighten out

Steering around a hazard requires a two-handed grip, a deliberate steer, then a correction back to straighten out.

25. A vehicle begins to skid after a sudden stop on a wet road. What should the driver do?

Ease off the brake or accelerator, look where you want to go and steer there
Turn the wheel opposite the direction you want to go
Brake harder to regain traction
Accelerate sharply to power out of the skid

Answer: A — Ease off the brake or accelerator, look where you want to go and steer there

Easing off the pedal and steering toward the intended path is the recommended skid response.

26. A vehicle's right wheels drop off the edge of the pavement onto a lower shoulder. What is the safe response?

Brake hard while turning sharply back onto the pavement
Slow gradually and steer gently back onto the road with slight wheel movements
Accelerate to pop the wheels back onto the road
Jerk the wheel sharply back onto the road immediately

Answer: B — Slow gradually and steer gently back onto the road with slight wheel movements

Panic steering back onto the road can cause loss of control, so a gradual slow-down and gentle steering is correct.

27. A vehicle's brakes fail while driving. What should the driver do?

Apply the parking brake slowly, ready to release it if the rear wheels lock and skid
Shift into neutral and coast until fully stopped
Pump the brake pedal as hard as possible
Turn off the engine immediately at full speed

Answer: A — Apply the parking brake slowly, ready to release it if the rear wheels lock and skid

Applying the parking brake slowly, and releasing it if the rear wheels lock, is the recommended first step for brake failure.

28. A front tire suddenly blows out while driving. What happens to the vehicle, and how should the driver respond?

The car accelerates on its own; turn off the engine at once
The car wobbles and shakes but does not pull; brake hard immediately
The car pulls sharply toward the side of the blown tire; grip the wheel and keep straight while slowing gradually
Steering becomes unresponsive; shift to neutral and coast

Answer: C — The car pulls sharply toward the side of the blown tire; grip the wheel and keep straight while slowing gradually

A front blowout pulls sharply to that side, and the driver should grip the wheel, keep straight, and slow gradually.

29. The accelerator pedal sticks and the engine keeps racing. What should the driver do?

Shift to neutral but leave the engine running and coast to a stop
Press the brake and accelerator together to override it
Turn off the engine, shift to neutral, find an escape path and brake gently
Pump the accelerator repeatedly while continuing to drive

Answer: C — Turn off the engine, shift to neutral, find an escape path and brake gently

A stuck accelerator calls for turning off the engine, shifting to neutral, finding an escape path, and braking gently.

30. A car breaks down and the driver manages to get it off the road. About how far behind the vehicle should flares be set so other drivers have time to change lanes?

50 to 100 feet
20 to 30 feet
500 to 600 feet
200 to 300 feet

Answer: D — 200 to 300 feet

Flares set 200 to 300 feet behind give approaching drivers enough warning to change lanes.