When driving in fog, what should you avoid doing?

Using high beams in foggy conditions is not advisable because of how fog affects visibility. High beams illuminate the fog particles, causing a reflection that can create a wall of light right in front of the driver. This glare can make it even more difficult to see through the fog and can impair visibility further, rather than improving it.

In contrast, driving slowly is a recommended practice in fog; lower speeds allow for better reaction times and improved control of the vehicle. Using fog lights is also appropriate as they are designed specifically to cut through fog and improve visibility without reflecting light back into the driver's eyes. Additionally, reducing speed is crucial when driving in fog to ensure safety. Slower driving allows for greater control and the ability to react to unexpected obstacles or changes in road conditions.