A Transportation Division was formed in 1931, shortly after the Railroad Commission was renamed the Public Service Commission. The Transportation Division regulated rates and service of public transportation. Until 1940, Transportation and the Utility divisions each directed a part of the engineering functions of the agency (see WIHV87-A608).
Transportation ceased being a division from 1940 to 1954. During that period, most of the functions of the division were handled by the Legal and Administration Division, and the engineering functions went to a separate Engineering Division. In 1954, the Motor Carrier section, Tariffs section, and the Statistics and Accounts section were combined to re-form the Transportation Division. Chapter 29, Laws of 1977 transferred transportation regulation to the Transportation Commission.
The primary function of the Transportation Division was to regulate rates and service of public transportation, including railroads, streetcars, and motor carriers (buses, freight haulers, etc.) The Moter Carrier section handled complaints and liaisoned with other PSC departments. The Tariffs section investigated transportation rates and fares, maintained a rate file, and represented the state in ICC rate proceedings. The Statistics and Accounts section audited and analyzed financial matters of railroad and motor carriers, maintained general transportation statistics, and prepared economic data. By 1973, railroad safety had been added to the responsibilities of the division.