488490 Other Support Activities for Road Transportation This U.S. industry comprises establishments primarily engaged in providing services (except motor vehicle towing) to road network users. The data published with NAICS code 488490 are comprised of these parts of the following SIC industries: 4173 Terminal or maintenance facilities for motor vehicle passenger transportation (except exclusive use of company vehicles) 4231 Motor freight terminal or joint terminal maintenance facility 4785 (pt) Fixed facilities and inspection and weighing services for motor vehicle transportation 4789 (pt) Other support activities incidental to transportation, nec