Why do sprinklers come out and wander around on rainy days?

1. "Cleaning the road on rainy days is actually more difficult than cleaning on sunny days." The staff said that the sprinklers sprinkled water on rainy days not to wet the ground, but mainly to clean up garbage.

2. Rain can remove dust from the road, but garbage on the road still exists and still needs to be processed.

3. After rain, leaves, plastic bags and other garbage tend to adhere to the road surface, so it is more difficult for a machine sweeper to clean than on sunny days. At this time, the road surface is flushed, and the garbage on the motor vehicle lane is washed to both sides of the road to facilitate the cleaning of residual garbage.

4. I hope my answer will be helpful to you