Columbia subject headings:
Highway engineering--Indexes--Periodicals.
Roads--Bibliography--Catalogs.
Transportation, Automotive--Indexes--Periodicals.
Transportation--Indexes--Periodicals.
Harvard subject headings:
Princeton subject headings:
Highway engineering--Indexes--Periodicals.
Roads--Bibliography--Catalogs.
Transportation, Automotive--Indexes--Periodicals.
Transportation--Indexes--Periodicals.