1-5 National Highway System Pavement Condition
Tuesday, January 3, 2017
percent of NHS facility miles
| Year | Good | Acceptable | Not acceptable |
|---|---|---|---|
| 2004 | 57 | 36 | 7 |
| 2009 | 64 | 31 | 5 |
| 2014 | 61 | 29 | 10 |
| Condition | Definition |
|---|---|
| Not acceptable | IRI > 170 |
| Acceptable | IRI 95 – 170 |
| Good | IRI < 95 |
Note: Pavement condition is measured by the International Roughness Index (IRI) which takes a longitudinal profile of pavement roughness based on one-way facility centerline miles.
Source: U.S. Department of Transportation, Federal Highway Administration, Highway Statistics, table HM-47, available at https://www.fhwa.dot.gov/policyinformation/statistics.cfm as of October 2016.