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Difficulty: MediumDriving in Adverse Weather and Low Visibility

You are driving on a rural two-lane highway at dusk when a sudden heavy snowstorm creates blowing snow and severely limits your vision. When you switch to high-beam headlights, the light reflects back off the falling snow, blinding your view of the road ahead. Which of the following actions is the safest driving procedure under these conditions?

  1. Switch to low-beam headlights and reduce your speed to match the limited visible distance.Answer
  2. B
    Maintain your high-beam headlights on so oncoming vehicles can spot you sooner while keeping your speed at the posted limit.
  3. C
    Continue driving at the posted speed limit while turning on hazard warning lights to signal traffic behind you.
  4. D
    Increase your speed slightly to exit the storm area quickly while keeping low-beam headlights on.

Answer

Switch to low-beam headlights and reduce your speed to match the limited visible distance.
Switching to low-beam headlights directs illumination downward to prevent light from reflecting off airborne snow back into your eyes, while reducing speed allows adequate stopping distance within your reduced sight distance.

Step-by-Step Solution

1
Adjust headlights for low visibility.
Using low-beam headlights directs light down toward the pavement rather than reflecting off airborne snow back into your eyes.
High beams cause blinding glare in dense fog, rain, or falling snow due to light refraction and reflection.
2
Adjust vehicle speed according to road and weather conditions.
Slowing down ensures that your stopping distance remains within the distance you can clearly see ahead.
The Basic Speed Law mandates driving at a safe speed for current conditions, regardless of posted speed limits.

Key Concept

Low-beam headlight usage and speed adjustment under the Basic Speed Law in low-visibility adverse weather.
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Topics

Driving in Adverse Weather and Low Visibility

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