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Government and Regulatory Agencies International Road Federation American Association of State Highway and Transportation Officials (AASHTO) American Public Works Association (APWA) American Road & Transportation Builders Association (ARTBA) American Traffic Safety Services Association (ATSSA) Association of Metropolitan Planning Organizations Bureau of Transportation Statistics Federal Highway Administration (FHWA) FHWA/NHTSA National Crash Analysis Center FHWA Office of Highway Safety FHWA TEA-21 Legislative Information House Transportation and Infrastructure Committee International Road Federation National Association of Counties Homepage (NACo) National Association of Regional Councils National Conference of State Legislatures National Work Zone Safety Clearinghouse States Inventory Project The Road Information Program (TRIP) Transportation Research Board Work Zone Clearinghouse