Final answer:
It is recommended to keep a greater distance when following a truck compared to following a passenger vehicle, to ensure adequate reaction time and visibility.
Step-by-step explanation:
When following a truck, it is recommended to stay farther behind the truck than you would if following a passenger vehicle. This increased distance is necessary because trucks have larger blind spots, take longer to stop, and can block your view of the road ahead. Keeping a safe distance ensures that you have adequate time to react to sudden stops or turns by the truck.
It is not recommended to stay close behind to reduce wind resistance, to be right next to the truck for better visibility, or to follow directly behind for optimal safety. These positions can be dangerous due to reduced visibility and increased risk of not having enough time to react if the truck brakes suddenly.