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| | Exhibit 11-21 (Site not responding. Last check: 2007-11-06) |
 | | And among all owners of urban collector superstructures, 42 percent are concrete, 25 percent are prestressed, 32 are steel, and 1 is timber. |
 | | And among all owners of urban local superstructures, about half are concrete, 20 percent are prestressed, 38 are steel, and 12 are timber. |
 | | And among all owners of urban superstructures, about 38 percent are concrete, 23 are prestressed, 38 are steel, and 1 is other. |
| www.fhwa.dot.gov /policy/2002cpr/exhibits/11-21.htm (697 words) |
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