Virginia National Driver Training Institute Practice Test

In foggy conditions, reducing speed and increasing following distance is essential for maintaining safety on the road. Fog can significantly impair visibility, often making it hard to see ahead or determine how far away other vehicles are. By slowing down, drivers have more time to react to obstacles, other vehicles, or sudden changes in the road conditions that may not be visible until they are much closer.

Additionally, increasing the following distance allows for a safer buffer zone between your vehicle and the one in front. This extra space is crucial in fog, as stopping distances can be longer than they normally would be in clearer conditions. It gives drivers adequate time to respond to unexpected situations, such as the vehicle in front suddenly braking.

The other choices, such as turning off headlights or using high beams, are detrimental in foggy conditions. Turning off headlights would make your vehicle less visible, while high beams can reflect off the fog and create glare, further reducing visibility. Driving at the speed limit may not be appropriate in reduced visibility conditions, as the limit is set based on ideal circumstances and does not take into account the fog's impact on visibility and road conditions.