What is the recommended action when driving through heavy fog?

Driving through heavy fog presents unique challenges due to significantly reduced visibility. Slowing down is the most recommended action because it allows for better control of the vehicle and provides more time to react to any hazards that may arise. When visibility is limited, maintaining a safe speed helps reduce the risk of accidents.

By driving slower, you can more easily navigate through the fog and support safe stopping distances, as your ability to see obstacles or changes in traffic conditions is compromised. Additionally, reducing speed helps ensure that you can respond appropriately to sudden changes, such as another vehicle stopping unexpectedly or pedestrians being more difficult to see.

Utilizing bright lights in fog can actually worsen visibility, as the light reflects off the moisture in the air, creating a glare. Following closely behind another vehicle can lead to rear-end collisions, especially if that vehicle has to stop suddenly. Parking lights are insufficient for safe driving in fog because they do not provide enough illumination to navigate effectively. All these factors underline why slowing down is the most prudent and safe action in foggy conditions.