USA Banner

Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Portions of the Department of Transportation are currently in shutdown/furlough status due to a lapse in appropriations. Please continue to monitor this page for updates on DOT’s operating status.
U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

1-5 National Highway System Pavement Condition (Table)

Thursday, January 16, 2014

Graphic Version | Excel

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.