- A Matter of Balance
- AMOB
- Act Fixing America's Surface Transportation Act
- FAST
- Activity Based Model
- ABM
- Administration for Community Living
- ACL
- Adult
- Advanced Metering Infrastructure
- AMI
- advanced treatment system
- ATS
- Aging and Disability Resource Connection/Center
- ADRC
- Alternate Fuel Vehicle
- AFV
- American Association of State Highway & Transportation Officials
- AASHTO
- American Community Survey