The Transportation Satellite Accounts (TSAs), developed by the Bureau of Transportation Statistics (BTS), belong to the group of satellite industry accounts. Satellite industry accounts expand on the national income and product accounts and the input-output accounts and supplement these accounts by focusing on a particular aspect of eco­nomic activity. The TSAs seek to capture transportation carried out by nontransportation industries for their own purposes and transportation carried out by households through the use of an automobile.

The TSAs expand on the U.S. Input-Output (I-O) Ac­counts. The I-O data provide detailed information on the inputs (including transportation services) used by each in­dustry to produce each industry’s output, the goods pro­duced by each industry, and the goods used by final con­sumers. For-hire transportation is one of the industries in the I-O accounts. For-hire transportation consists of the services provided by transportation firms to industries and the public on a fee-basis, such as air carriers, railroads, transit agencies, common carrier trucking companies, and pipelines. The TSAs expand the I-O accounts by show­ing the value of the transportation services carried out by nontransportation industries for their own purposes (known as business-related in-house transportation). The TSAs also expand .on the I-O accounts to include the value of the transportation carried out by households through the use of a household vehicle.