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What must you do if your visibility is limited to less than 400 feet?
Increase the speed
Turn on your high beams
Slow down to 50mph or less
Stop driving until visibility improves
The correct answer is: Slow down to 50mph or less
When your visibility is limited to less than 400 feet, it is crucial to slow down to 50mph or less. This is the safest option to ensure that you have enough time to react to potential hazards that may arise due to limited visibility. By reducing your speed, you increase the margin of safety and give yourself more time to stop or maneuver your vehicle if needed. It is important to always prioritize safety on the road, especially in challenging driving conditions like limited visibility. Turning on your high beams (option B) in limited visibility conditions can actually reduce your ability to see clearly as the bright lights can reflect off particles in the air, such as fog or mist, and create glare. Increasing speed (option A) when visibility is poor is dangerous as it reduces the time you have to react to hazards. Stopping driving until visibility improves (option D) may not always be practical but slowing down is the most appropriate action to take in such circumstances.