No vehicle licensed in accordance with the provisions of this ordinance shall be operated or permitted on the streets, sidewalks, and other public places of the city after 1 hour after sundown of any day, except where the person operating the vehicle is over 18 years of age. The operation of any vehicle licensed in accordance with the provisions of this ordinance on any public street within the city shall be deemed a public nuisance and traffic hazard, and any licensee found to be operating or permitting the operation of his or her vehicle on the city streets shall be deemed to be contributing to a public nuisance and traffic hazard, and that action may be cause for revocation of any license issued under this ordinance.