This section contains useful technical information about hot mix asphalt and hot mix asphalt pavements.

Asphalt Pavement Alliance (APA)
Contains many fine technical resources for HMA pavements including Perpetual Pavements, life cycle cost analysis software and many other timely research articles.

Washington State Department of Transportation (WSDOT)

• WSDOT Research Office
  Contains a searchable database that has one page summaries for all of the research reports that have been published by WSDOT. Some are available online in .pdf format.

• WSDOT pavement research topics
  Listing of current WSDOT pavement research efforts.

• WSDOT Tech Notes.  Short 1 to 3 page technical notes on current pavement design and construction topics.
  • Temperature Differentials and the Related Density Differentials in Asphalt Concrete Pavement Construction
  • Stone Matrix Asphalt (SMA)
  • Longitudinal Joint Construction Techniques
  • Tack Coat
  • The Use of Novachip® as a Surface Treatment
  • Use of Rock Cap Material as a Capillary Break