Columbia subject headings:
Harvard subject headings:
Information storage and retrieval systems--Transportation--Congresses.
Local transit--United States--Data processing--Congresses.
Local transit--United States--Decision making--Congresses.
Transportation--United States--Data processing--Congresses.
Princeton subject headings:
Information storage and retrieval systems--Transportation--United States--Congresses.
Local transit--United States--Data processing--Congresses.
Local transit--United States--Decision making--Congresses.