Figure 1-2: Urban Road Conditions in Missouri: 2000
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NOTE FOR DATA ON THIS PAGE: Road condition is based on measured
pavement roughness using the International Roughness Index (IRI). IRI is a
measure of surface condition. A
comprehensive measure of pavement condition would require data on other
pavement distresses such as rutting, cracking, and faulting.
SOURCE FOR DATA ON THIS PAGE: U.S. Department of Transportation,
Federal Highway Administration, Highway Statistics, Washington, DC: annual editions, tables HM-63 and HM-64,
available at http://www.fhwa.dot.gov/ as of Feb. 1, 2002.
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