Yellow Roadway Corp. traces its origins to 1924 when A.J. Harrell, an Oklahoma City entrepreneur, founded a bus and taxi company and named it Yellow Cab Transit Co. In 1926, he shortened the name to Yellow Transit Co.
In 1929, AJ was concerned about road safety, so he commissioned the E.I. DuPont Co. to determine the color that would be most visible on the tractors from the greatest distance on the nation's highways. DuPont's research found the color Swamp Holly Orange. We still use this color on Yellow trucks today.