The National Asphalt Pavement Association (NAPA) in cooperation with the Federal Highway Administration (FHWA) proposed a research program to investigate the performance of WMA products. Initial research was conducted on the feasibility of using these technologies in the United States through a cooperative agreement between the National Center for Asphalt Technology (NCAT) and FHWA. This study also included additional monetary support from NAPA and the individual technology providers. This initial research has been completed and the findings have been published by NCAT. The reports can be found on their website published as:

• Report 06-02 "Evaluation of Evotherm for Use in Warm Mix Asphalt"
• Report 05-06 "Evaluation of Sasobit for Use in Warm Mix Asphalt"
• Report 05-04 "Evaluation of Aspha-Min Zeolite for Use in Warm Mix Asphalt"

Although the initial research focused on the Aspha-Min®, Sasobit®, and Evotherm＆#8482; products, future research in this area is rapidly expanding to include the other WMA technologies.