Using products of the Strategic Highway Research Program to build better, safer roads 

March 1999 

FOCUS (ISSN 1060-6637) is published monthly by the U.S. Department of Transportation's Federal Highway Administration (FHWA). 
 
 
 
Federal Highway Administrator: 
Kenneth R. Wykle

 
 
 

 

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Notice: The United States Government does not endorse products or manufacturers. Trade or manufacturers' names appear herein solely because they are considered essential to the object of the article. 

Superpave is a registered trademark and the SHRP logo is a registered service mark of the National Academy of Sciences (NAS). This publication is neither endorsed nor sponsored by NAS.

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This page last updated 
on April 20, 1999