Columbia subject headings:
Freight and freightage--United States.
Highway capacity--United States--Evaluation.
Shipment of goods--United States.
Traffic congestion--Economic aspects--United States.
Trucking--United States.
Harvard subject headings:
Freight and freightage--United States
Highway capacity--United States--Evaluation.
Shipment of goods--United States.
Traffic congestion--Economic aspects--United States.
Trucking--United States
Princeton subject headings:
Freight and freightage--United States.
Highway capacity--United States--Evaluation.
Shipment of goods--United States.
Traffic congestion--Economic aspects--United States.
Trucking--United States.