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How good are American roads?

(www.construction-physics.com)
252 points chmaynard | 1 comments | | HN request time: 0.232s | source
1. FrustratedMonky ◴[] No.42204095[source]
Title is for 'American' roads.

I'd like to see some of these charts with other countries included like Germany, or some country from each continent.