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2007-06-04 15:55:58 · 1 answers · asked by Anonymous in Science & Mathematics Earth Sciences & Geology

1 answers

All of it that has roads. What varies is the number of people per car (per captia car ownership) which is low in the US and high in poorer countries.
http://www.transport-links.org/transport_links/filearea/publications/1_621_PA1284_1992.pdf

2007-06-07 06:58:27 · answer #1 · answered by Mike1942f 7 · 0 0

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