These units provide services to the general public or to other business
enterprises. Transportation is the process of moving freight and/or passengers and of storinggoods. This aggregate includes: railroad transportation, local and interurban passenger transit, trucking (including local or long-distance trucking or transfer services), water transportation, air transportation. This sub-industry segment also includes pipeline transportation of petroleum and other commodities (except natural gas which is classified under utilities), and the postal service.