Werner Enterprises fleet consists of more than 8,600 tractors and 23,700 trailers. The company is a truckload motor carrier of general commodities in both interstate and intrastate commerce. It is among the largest truckload carriers in the United States. The company maintains its headquarters in Omaha, Neb., near the center of its service area, with service terminals throughout the United States, including one in Phoenix. Werner Enterprises operates throughout the 48 contiguous states, as well as portions of Canada, and provides trailer service in and out of Mexico. Clarence L. Werner, who started the business with one truck at the age of 19, founded Werner Enterprises in 1956.