What is the best action to take when driving in fog?

When driving in fog, using low-beam headlights and reducing speed is the best action to take. Low-beam headlights are designed to provide adequate illumination close to the vehicle while minimizing the amount of light that reflects off the fog and creates glare. This allows for better visibility in low-visibility conditions such as fog. Additionally, reducing speed is crucial because fog can significantly impair your ability to see other vehicles, road signs, and any obstacles on the road. Slower speeds give you more time to react to any unexpected situations that may arise in dense fog.

In contrast, turning off all lights would render the vehicle nearly invisible to others and would be extremely unsafe. Using high-beam headlights can create a blinding effect when their light reflects off the moisture in the fog, further decreasing visibility. Driving as you normally would ignores the hazardous conditions that fog presents, potentially leading to dangerous situations on the road. Therefore, by combining low-beam headlights with a slower speed, you enhance your safety and the safety of others while navigating through foggy conditions.