Share of population living in low-income census tracts by Road Ruggedness Scale and rurality group, 2010
![Share of population living in low-income census tracts by Road Ruggedness Scale and rurality group, 2010 Bar chart comparing the share of U.S. population in low-income census tracts living in urbanized areas, urbanized commuting areas, and rural areas by Road Ruggedness Scale category in 2010.](/webdocs/charts/108243/fig_4_rugged_terrain_768px.png?v=4812.8)
The intersection of rugged terrain and economic activity remains understudied, so USDA, Economic Research Service researchers developed two classifications of U.S. census tracts: the six-level Area Ruggedness Scale and the five-level Road Ruggedness Scale.
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