[[losing chunks of the load is a DOT violation, even if it’s mud/rocks on the tires.]]
We keep several lengths behind trucks in winter- always chunks falling off- ice, mud, rocks, bark, snow (LOTS of trucks hauling wood)
I love rock haulers who can’t be bothered to use the auto tarp to cover their over flowing loads of pea gravel
If you are going to drive a truck make sure your load is secured/covered