Disclosure

This is not an official U.S. Government website. It is developed and maintained by the AIEI (Asphalt | Innovate | Enlighten | Implement) program under the sponsorship of the U.S. Department of Transportation (USDOT) to support information exchange under Cooperative Agreement No. 693JJ32350026.

The contents are provided for informational purposes only. Neither the AIEI program nor the U.S. Government assumes any liability for the use of the information presented.

The U.S. Government does not endorse any products or manufacturers. References to trademarks or manufacturers are included solely because they are considered essential to the content and do not imply preference, approval, or endorsement.

All AASHTO and ASTM standards referenced are non-governmental, voluntary standards and do not constitute requirements under Federal law.