It is unlawful for any person to operate or load, or cause to be operated or loaded, a vehicle upon any public highway within the jurisdiction of the city from which any kind of debris, trash, building materials, garbage, sand, gravel, rocks, mud, and all other types of material falls, discharges, escapes, or is otherwise tracked therefrom upon the streets, sidewalks, and gutters of the city. This section shall not apply to official street maintenance, construction, or snow removal operations. (Ord. 96-10 § 1: prior code § 11-358(A))