Exit133 is about Tacoma
The answer (at least according to a recent UN program report) is a surprisingly high 45-50% of a city's land area, with 30% or more of the total area made up of roads.
The report, titled "Streets as Public Spaces and Drivers of Urban Prosperity" asks you to tweak the way you think about public spaces, and the way you think about roads. The researchers argue that streets should be counted as public spaces, and that there is a correlation between expansive street grids and prosperity.
Places that are less than 10-15% streets, the researchers say "tend to resist very badly when you want to increase the compactness or density because there is not enough street."
Is it possible that roads are better for cities than we thought? Should we be lobbying for more roads in Tacoma?Read more at Next City