United Parcel Service and FedEx are both prominent trucking companies in the United States that are steady employers of truck drivers nationwide. Trimac Transportation Services is the nation's leading transporter of liquid and solid bulk deliveries, and Southeastern Freight Lines and Interstate Distributor are leading companies in different regions.
Southeastern Freight Lines operates in the southeastern region of the United States as well as in Puerto Rico and the U.S. Virgin Islands. Interstate Distributor operates out of the western United States but makes deliveries for Fortune 500 companies across the United States. Old Dominion Freight Line is another well-respected company that specializes in less-than-truckload deliveries and has been operating since the 1930s.