Columbia subject headings:
Traffic regulations--United States--Congresses.
Traffic safety--United States--Congresses.
Traffic violations--United States--Congresses.
Harvard subject headings:
Traffic regulations--United States--Congresses.
Traffic safety--United States--Congresses.
Traffic violations--United States--Congresses.
Princeton subject headings:
Traffic regulations--United States--Congresses.
Traffic safety--United States--Congresses.
Traffic violations--United States--Congresses.