Establishments primarily engaged in the inspection and weighing of goods in connection with transportation or in the operation of fixed facilities for motor vehicle transportation, such as toll roads, highway bridges, and other fixed facilities, except terminals.
- Cargo checkers and surveyors, marine
- Highway bridges, operation of
- Inspection services connected with transportation
- Toll bridge operation
- Toll roads, operation of
- Tunnel operation, vehicular
- Weighing services connected with transportation