What is the recommended action when driving behind a large vehicle that blocks your vision?

When driving behind a large vehicle that obstructs your view, increasing your following distance is the recommended action. This practice allows for a safer cushion of space between your vehicle and the large vehicle ahead. With increased following distance, you gain better visibility of the road ahead once the large vehicle moves or if any hazards arise. This extra space provides you with additional time to react to unexpected changes in traffic conditions, making your driving experience safer.

Decreasing speed can also be a prudent decision, but simply slowing down does not ensure that you will have a clear line of sight. Changing lanes frequently can lead to unpredictable driving behavior and create additional risks for you and other drivers. Honking the horn is generally discouraged as it may distract other drivers and does not resolve the visibility issue; instead, maintaining a safe distance is a more effective strategy to ensure you're driving safely.