| http://www.w3.org/ns/prov#value | - With the United States??? population expected to grow from more than 300 million in 2010 to more than 400 million by 2050, rebuilding and expanding the capacity of our roads, airports and transit systems is a strategic necessity for long-term economic growth,??? U.S. Transportation Secretary Ray LaHood said at the time.The Congressional Budget Office estimates that the country needs to spend $20 b
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