There were 23,250 support activities for transportation businesses in the U.S. that had between one and four employees in 2016, according to County Business Patterns (CBP) statistics provided by the United States Census Bureau.

CBP data indicates that there are more establishments categorized as professional, scientific and technical services businesses with between one and four employees in the U.S. than in any other category.

The following table shows how many support activities for transportation businesses with between one and four employees were in the U.S. during the period from 2012 to 2016.