No vehicle may be driven or moved on any highway unless it is so constructed or loaded as to prevent its contents from dropping, sifting, leaking, or otherwise escaping therefrom, except that sand may be dropped for the purpose of securing traction, or water or other substance may be sprinkled on a roadway in cleaning or maintaining the roadway. No person may operate on any highway any vehicle with any load unless the load and any covering thereon is securely fastened so as to prevent said covering or load from becoming loose, detached, or in any manner a hazard to other users of the highway.