Columbia subject headings:
Federal aid to transportation--United States.
Highway law--United States.
Transportation, Automotive--Law and legislation--United States.
Trucks--Weight--Government policy--United States.
Harvard subject headings:
Highway law--United States.
Transportation--Law and legislation--United States
Princeton subject headings:
Federal aid to transportation--United States.
Highway law--United States.
Transportation, Automotive--Law and legislation--United States.
Trucks--Weight--Government policy--United States.