 A significant portion of litter along roadways in the U.S. is now being attributed to improperly tarped vehicles such as open-bed vehicles as well as trash and recycling collection vehicles that have not been properly secured.A national survey of United States prosecutors noted the most important factor in prosecuting an offense was the "degree of harm" a violation posed and the "criminal intent" of the offender.America's most prosecuted littering offense involve illegal hazardous waste disposals.