Why is your German shepherd scared of the road sweeper?

Your German Shepherd may be scared of the road sweeper due to its loud noise, sudden movements, and large size, which can be intimidating for dogs. The unfamiliarity of the machine and its vibrations might also contribute to their fear. Additionally, if your dog has not been exposed to such machinery before, their natural instinct is to be cautious of anything that seems threatening or out of the ordinary. Gradual desensitization and positive reinforcement can help alleviate this fear over time.