Columbia subject headings:
Harvard subject headings:
Central business districts--Europe.
City traffic--Europe.
Pedestrian areas--Europe.
Streets--Environmental aspects--Europe.
Urban transportation policy--Europe.
Princeton subject headings:
Central business districts--Europe--Case studies.
City traffic--Europe--Case studies.
Pedestrian areas--Europe--Case studies.
Traffic engineering--Europe--Case studies.
Urban transportation policy--Europe--Case studies.