If a truck in front of you passes a lamppost, how long should you wait before reaching that lamppost?

Answer: B — 2 seconds

The recommended waiting time of 2 seconds before reaching a lamppost that a truck in front of you has just passed is based on the concept of maintaining a safe following distance. This guideline helps ensure that you have adequate time to react to any sudden stops or emergencies. In general, a larger vehicle like a truck has a longer stopping distance due to its size and weight. By waiting 2 seconds, you allow enough time for the truck to create a safe buffer between itself and any potential hazards, while also giving yourself the space needed to react safely. Following the 2-second rule is crucial for safety, especially when driving behind larger vehicles, as they may obscure your view of the road ahead and require more time to respond to changing conditions. This practice is essential for maintaining overall road safety and preventing collisions.