Road density is the ratio of the length of the country's total road network to the country's land area. The road network includes all roads in the country: motorways, highways, main or national roads, secondary or regional roads, and other urban and rural roads.
The United States being the biggest economy in the world significantly influences the global economic situation. The US economy is comprehensively covered by data and statistics from multiple government and private sources. We selected the most significant and up-to-date ones and presented them in this cheat sheet.