Skip Top Navigation

Research Reports

An Initial Evaluation of the WSDOT Quality Assurance Specifications for Asphalt Concrete


The Washington State Department of Transportation (WSDOT) did a trial implementation of a quality assurance (QA) specification for asphalt concrete during the 1989 paving season. To assess the QA specification, data from both non-QA and QA projects built that year were compared. Based on these results, the QA projects were evaluated as having improved quality. Subsequently, the QA specification was fully implemented within WSDOT.


  • Date Published: April, 1994
  • Publication Number: WA-RD 326.1
  • Last Modified: October 24, 2007
  • Authors: Stephen J. Markey, Joe P. Mahoney, Robert H. Gietz.
  • Originator: Washington State Transportation Center (TRAC)
  • # of Pages: 93 p., 2,122 KB (PDF)
  • Subject: Asphalt concrete, Evaluation, Improvements, Quality assurance, Specifications.
  • Keywords: Quality Assurance, statistics, asphalt concrete.
  • Related Publications:

This abstract was last modified April 29, 2008