AMRL (AASHTO Materials Reference Library) CCRL (The Cement and Concrete Reference Laboratory)AASHTO Technology Implementation Group
NTPEP (National Transportation Product Evaluation Program)APEL (AASHTO Product Evaluation Listing)
TRB (Transportation Research Board)
LTPP InfoPaveTM (Long-Term Pavement Performance)
The following link contains a new Google search engine that searches only the State DOT web sites across the country. Use it to more easily find information on your state counterparts' web sites!
State DOT Web Site Search Tool