A0000: Technical Activities Council
A0010: International Activities
AB000: Policy and Organization Group
ABC00: Section - Management and Leadership
ABE00: Section - Transportation Policy
ABG00: Section - Research and Education
ABJ00: Section - Data and Information Systems
AD000: Planning and Environment Group
ADA00: Section - Transportation System Policy, Planning and Process
ADB00: Section - Travel Analysis Methods
ADC00: Section - Environment and Energy
ADD00: Section - Social, Economic, and Cultural Issues
AF000: Design and Construction Group
AFB00: Section - Design
AFD00: Section - Pavement Management
AFF00: Section - Structures
AFH00: Section - Construction
AFK00: Section - Bituminous Materials
AFN00: Section - Concrete Materials
AFP00: Section - Geology and Properties of Earth Materials
AFS00: Section - Soil Mechanics
AH000: Operations and Maintenance Group
AHB00: Section - Operations
AHD00: Section - Maintenance
AL000: Legal Resources Group
AN000: System Users Group
ANB00: Section - Safety
AND00: Section - Users Performance
ANF00: Section - Pedestrians and Cycles
AP000: Public Transportation Group
AR000: Rail Group
AT000: Freight Systems Group
AV000: Aviation Group
AW000: Marine Group