Examkin

Question

Difficulty: HardDriving in Adverse Weather and Low Visibility

You are driving on a rural highway at night with a posted speed limit of 55 mph when you suddenly encounter a thick fog bank that reduces visibility to less than 100 feet. According to safe driving practices and basic speed laws, what is the most appropriate set of actions you should take?

  1. Reduce your speed significantly to match visibility, activate your low-beam headlights, and increase your following distance behind other vehicles.Answer
  2. B
    Maintain the posted speed limit of 55 mph to prevent rear-end collisions from vehicles behind you, and switch your headlights to high beams to maximize forward vision.
  3. C
    Switch to high-beam headlights and decrease your following distance to two seconds so you can clearly keep the lead vehicle's taillights in sight.
  4. D
    Apply firm braking to bring your vehicle to an immediate complete stop within your travel lane, leaving high-beam headlights on until conditions clear.

Answer

Reduce speed significantly to suit visibility conditions, switch headlights to low beams (or fog lights), and expand the following distance.
The correct response recognizes that under severe visibility limits, drivers must obey the Basic Speed Law by reducing speed to a level where they can safely stop within their sight distance. Low-beam headlights direct light down onto the roadway rather than reflecting off the fog back into the driver's eyes, and increasing following distance provides an essential buffer for potential hazards ahead.

Step-by-Step Solution

1
Assess environmental visibility and immediate roadway conditions.
Recognize that visibility under 100 feet requires immediate operational adjustments.
Safe stopping distance at 55 mph exceeds 200 feet, making 55 mph unsafe when visibility is under 100 feet.
2
Adjust vehicle speed in compliance with the Basic Speed Law.
Slow down to a speed where you can stop within the distance you can clearly see ahead.
Posted speed limits apply only to ideal road and weather conditions.
3
Select correct vehicle lighting modes.
Ensure low-beam headlights or specialized fog lights are turned on.
High-beam headlights reflect light directly back into the driver's eyes off atmospheric water droplets.
4
Expand safety buffers.
Increase following distance to 5 seconds or more.
Compensates for reduced hazard perception and sudden stops by lead vehicles.

Key Concept

Basic Speed Law compliance and headlight management during low visibility conditions
Rate this question

Topics

Driving in Adverse Weather and Low Visibility

More questions from this topic