It shall be unlawful for any person to operate any vehicle transporting, carrying or hauling any flammable or explosive liquid or material, except its own fuel supply, over or upon any of the streets, highways, alleys, avenues, or boulevards within the City of Grand Island except over the following:
Capital Avenue, provided, that such regulation shall not prevent the delivery of any such flammable or explosive liquid or material to the place of business of any person engaged in the manufacturing, processing, selling, or distributing of such flammable or explosive liquid or material within the City, nor shall the provisions of this section apply to any vehicle departing from the City of Grand Island, such vehicle having been loaded with flammable or explosive liquid material within the City.
The City Engineer shall cause to be erected all necessary signs and signals routing such vehicles carrying flammable or explosive liquid or material according to the provisions of this section.