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AASHTO STEM Outreach Solutions
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AASHTO Technical Training Solutions
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AASHTO Winter Weather Management
AASHTOWare Solutions
National Operations Center of Excellence
Centers of Excellence
Center of Environmental Excellence
National Operations Center of Excellence
Training
AASHTO Leadership Development Series
AASHTO Technical Training Solutions
Highway Safety Manual
Committees
Board of Directors
Board of Directors
Executive Committee
Strategic Management Committee
Policy Bodies
Transportation Policy Forum
Council on Active Transportation
Council on Aviation
Council on Highways and Streets
Council on Public Transportation
Council on Rail Transportation
Council on Water Transportation
Special Committee on Freight
Program Delivery and Operations Committees
Bridges and Structures
Construction
Design
Environment and Sustainability
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Materials and Pavements
Planning
Right of Way, Utilities, and Outdoor Advertising Control
Traffic Engineering
Transportation System Operations
Enterprise/Cross-Discipline Committees
Communications
Data Management and Analytics
Funding and Finance
Performance-based Management
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Transportation System Security and Resilience
AASHTO Emerging Mobility Areas
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Internal & External Audit
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Equity Task Force
Special Committees
Special Committee on Research and Innovation
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AASHTO Geospatial Online Transportation User Group
Geospatial Information Systems for Transportation
National Committee of the USA World Road Association (PIARC)
State-Amtrak Intercity Passenger Rail Committee
US Route Numbering
About
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Airworthiness Directives; Restricted Category Model CH-47D Helicopters
December 22, 2025
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