Freight hauler Trans-System operates through three main units: System Transport (flatbed); TW Transport (refrigerated and dry van); and James J. Williams (bulk commodities). The Trans-System trucking companies operate from some 10 terminals in the western US. Overall, the company's fleet consists of about 1,000 tractors and 1,500 trailers. Trans-System also offers logistics services and runs a driver training school. Jim Williams founded the company in 1972, although it got its start when Williams' grandfather began transporting petroleum products throughout northern Idaho and eastern Washington.