How long can it take for a fully-loaded tractor-trailer to stop on dry pavement?

Answer: C — More than 400 feet

A fully-loaded tractor-trailer can take more than 400 feet to stop on dry pavement due to its significant weight and size. When carrying a full load, such a vehicle's stopping distance is greatly extended compared to lighter vehicles because it takes longer for the brakes to effectively slow down and bring the truck to a standstill. Factors like the weight of the cargo, the type of braking system, and road conditions all contribute to this extensive stopping distance. This knowledge is crucial for drivers, especially in understanding how to maintain a safe following distance and anticipate the stopping capabilities of larger vehicles on the road. Recognizing that it can take a fully-loaded tractor-trailer significantly longer to stop than a standard vehicle allows drivers to make informed decisions, improving safety for themselves and others on the roadway.