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• Advocates for Highway and Auto Safety
• American Association of State Highway and Transportation Officials (AASHTO)
• American Automobile Association (AAA)
• American Automobile Association Foundation for Traffic Safety
• American Concrete Pavement Association (ACPA)
• American Consulting Engineers Council (ACEC)
• American Public Works Association
• American Road and Transportation Builders Association
• American Society for Testing and Materials (ASTM)
• American Society of Civil Engineers
• Asphalt Institute
• Associated General Contractors of America
• Association of Metropolitan Planning Organizations
• Conference Of Minority Transportation Officials (COMTO)
• CRASH (Citizens for Responsible and Safe Highways)
• Environmental Protection Agency Transportation Partners
• Federal Motor Carrier Safety Administration
• Hawaii Transportation Association (HTA)
• Institute of Transportation Engineers
• Insurance Institute for Highway Safety
• Intermodal Association of North America (IANA)
• International Grooving & Grinding Association (IGGA)
• International Municipal Signal Association
• International Right-of-Way Association
• ITS Home Page
• ITS America
• Local Technical Assistance Program Clearinghouse
• Manual on Uniform Traffic Control Devices for Streets and Highways
• Mothers Against Drunk Driving (MADD)
• National Asphalt Pavement Association
• National Association of County Engineers (NACE)
• National Association of Regional Councils
• National Concrete Pavement Technology Center
• National Defense Transportation Association
• National Safety Council
• National Sleep Foundation
• National Society of Professional Engineers (NSPE)
• National Transportation Library
• Network of Employers for Traffic Safety (NETS)
• Oak Ridge National Laboratory Center for Transportation Analysis
• Road Information Program
• Texas Transportation Institute
• Transportation Research Board
• University of Michigan Transportation Research Institute (UMTRI)
• Upper Great Plains Transportation Institute
• U.S. Department of Transportation
• Western Research Institute

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