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Pavement Surface Condition of the NHS and Interstate System (Rural and Urban)

NHS

IRI 95-170: 39.0%

IRI < 95: 54.5%

IRI > 170: 6.5%

INTERSTATE

IRI 95-170: 33.4%

IRI < 95: 3.2%

IRI > 170: 3.4%

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United States Department of Transportation - Federal Highway Administration