Columbia subject headings:
Express highways--Government policy--United States--History.
Express highways--United States--History.
Transportation and state--United States--History.
Harvard subject headings:
Express highways--Government policy--United States--History.
Express highways--United States--History.
Transportation and state--United States--History.
Princeton subject headings:
Express highways--Government policy--United States--History.
Express highways--United States--History.
Transportation and state--United States--History.