OSM: Traffic signs map zones
Other example maps:
America
Traffic signs in (Santa Fe) (Argentina)
Traffic signs in Rio de Janeiro (Rio de Janeiro) (Brazil)
Traffic signs in Oklahoma City (Oklahoma) (United States)
Asia
Traffic signs in (Japan)
Australia
Traffic signs in Sidney (New South Wales) (Australia)
Europe
Traffic signs in (Nordbaden) (Germany)
Traffic signs in Cornellà de Llobregat (Catalunya) (Spain)
Traffic signs in Portbou (Catalunya) (Spain)
Traffic signs in el Prat de Llobregat (Catalunya) (Spain)
Traffic signs in Sant Boi de Llobregat (Catalunya) (Spain)
Traffic signs in Vilanova i la Geltrú (Catalunya) (Spain)
Traffic signs in Fregenal de la Sierra (Extremadura) (Spain)