Description

Total proportion of a defined urban area devoted to roadways for motorised vehicle use only (ratio or fraction).

Roads are open areas, but depending on the road type, typically do not yield the same positive effects associated with the open urban areas/urban public spaces. Roadways are generally non-permeable, and depending on the road type, are inaccessible and potentially dangerous, produce air, light and noise pollution, and form barriers to movement and ecological compartmentalization.

Scale as linked to D2.2 framework

• City
• Neighborhood 
• Street

Data source [ link to data framework]

• maps

Data needs

• Road type, speed, congestion, traffic type and structure

Expected Outputs

• Annual measurements

Calculation methods

• The total area covered by grey roads for cars is calculated from maps or estimated from appropriate sources, and the ratio to the total area is calculated

Links and references