No person shall haul or deposit in or along any street or alley any stone, gravel, sand, dirt, lumber, manure, offal, rubbish, or other loose materials, liquids, or substances, in any vehicle which is not so constructed as to prevent such materials from dropping onto any street or alley. Hauling of such materials in such a manner so that they are not covered or otherwise secured on the vehicle in which they are being transported is expressly prohibited.
(‘85 Code, § 12.10) Penalty, see § 98.999