Reader’s guide
In each figure, data labelled “OECD” are simple mean averages of the OECD countries displayed, unless otherwise indicated. Whenever data are available for less than all 38 OECD countries, the number of countries included in the calculation is specified in the figure (e.g. OECD 33).
Each figure specifies the time period covered, and figure notes provide further details when data refer to different time periods for different countries. Countries are referred to by their ISO codes (Table 1).
In this report, colour coding in figures is used as follows: the colour blue describes the quantity of the built environment and components; dark green describes the quality features of housing; purple describes the quality features of transport; orange describes the quality features of technical infrastructure; light blue describes components of urban design/land use, except for green areas (for which green is used) and information relative to the city/core centre (for which dark pink is used, to differentiate it from information relative to the commuting area). The OECD average is highlighted using the colour complementary to the main colour used (e.g. orange, if the main colour is blue; red, if the main colour is green) to ensure greater accessibility for people with colour vision deficiency (colour blindness).