1-5 National Highway System Pavement Condition (Table)
Thursday, January 16, 2014
percent of vehicle miles traveled
| Year | Good | Acceptable | Not acceptable |
|---|---|---|---|
| 2000 | 48 | 43 | 9 |
| 2004 | 52 | 39 | 9 |
| 2008 | 57 | 35 | 8 |
| Condition | Definition |
|---|---|
| Not acceptable | IRI > 170 |
| Acceptable | IRI 95 – 170 |
| Good | IRI < 95 |
Note: Pavement condition is measured by the International Roughness Index (IRI).
Source: U.S. Department of Transportation, Federal Highway Administration, 2010 Status of the Nation's Highways, Bridges, and Transit: Conditions & Performance, available at www.fhwa.dot.gov/policy/2010cpr as of September 2013.