It shall be unlawful for any person or persons, firms, or corporations to operate a commercial truck on residential streets except those trucks that are actually engaged in making deliveries or pick-ups at residential dwellings. Further, he, she, or they shall utilize state highways or designated truck routes as his, her, or their primary routes. Trucks making deliveries or pick-ups on residential streets shall adhere to the provisions of this section. Commercial trucks shall be any truck, other than pick-ups or vans, used for business purposes such as deliveries or hauling cargo for profit.