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U.S. pavement surface smoothness on interstate highways 2008

U.S. pavement surface smoothness on rural and urban interstate highways in 2008

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Release date

May 2010

Region

United States

Survey time period

2008

Supplementary notes

The International Roughness Index (IRI) is one ot the most widely used measures of pavement smoothness or ride quality.
International Roughness Index Scores:
Good (less than 95)
Acceptable (between 95 an 170)
Poor (greater than 170)

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