QA Specifications Practices

This report provides an initial examination of current quality assurance (QA) and quality control (QC) programs at state highway agencies (SHAs). Of specific interest is the states' use of statistically based specifications.

The report overviews questionnaire results from the neighboring SHAs, recently obtained information from the Texas Department of Transportation on mix segregation, and sample results from the Washington State Department of Transportation (WSDOT) QA database.

This report is the first of two that examine the current WSDOT QA hot mix specification.


Publication Date: 
Monday, July 31, 2000
Publication Number: 
WA-RD 498.1
Last modified: 
10/12/2016 - 15:42
Joe P. Mahoney, Andrew W. Backus.
Washington State Transportation Center (TRAC)
Number of Pages: 
Asphalt concrete, Design practices, Hot mix paving mixtures, Mix design, Quality assurance, Quality control, Questionnaires, Specifications, State departments of transportation, Surveys.