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Difficulty: MediumDriving in Fog and Reduced Visibility

While driving on a two-lane highway, a driver enters a patch of heavy fog that reduces forward visibility to less than 100 feet. To maintain proper lane positioning without being blinded by the glare of oncoming vehicles, which visual reference should the driver look toward?

  1. The solid white line marked along the right edge of the road (fog line)Answer
  2. B
    The yellow centerline dividing the traffic lanes to monitor oncoming vehicles
  3. C
    The taillights of the vehicle ahead while reducing following distance to keep them in view
  4. D
    The center of the road far ahead while maintaining the posted maximum speed limit

Answer

The solid white line marked along the right edge of the road (fog line)
When driving in dense fog, focusing on the solid white line on the right edge of the roadway (commonly known as the fog line) provides an accurate lane alignment reference while directing your sight line down and to the right. This prevents temporary blindness caused by the scattered glare of oncoming headlights.

Step-by-Step Solution

1
Assess the visual hazard in dense fog
Recognize that looking toward the center of the road or oncoming lane increases glare from opposing headlights.
Light rays scatter off moisture droplets in fog, intensifying glare when looking directly into opposing light sources.
2
Select the safest visual guide on the pavement
Direct gaze toward the right edge marking (fog line) or pavement shoulder boundary.
Tracking the right edge line keeps the vehicle centered in its lane and keeps driver vision focused down and to the right, away from oncoming lights.

Key Concept

Visual reference and spatial orientation during low-visibility driving
Estimated Time:1m 0s
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Topics

Driving in Fog and Reduced Visibility

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