| Acronym |
Definition |
| A&E | Architectural & Engineering |
| A/E | Architectural & Engineering |
| AASHTO | American Association of State Highway & Transportation Officials |
| ACHP | Advisory Council on Historic Preservation |
| ADA | Americans with Disabilities Act |
| ADA | Assistant Division Administrator |
| ADEC | Alaska Department of Environmental Conservation |
| ADF&G | Alaska Department of Fish and Game |
| ADNR | Alaska Department of Natural Resources |
| ADOT | Arizona Department of Transportation |
| ADOTPF | Alaska Department of Transportation & Public Facilities |
| ADP | Automated Data Processing |
| ADT | Average Daily Traffic |
| AGC | Associated General Contractors |
| AHTD | Arkansas State Highway & Transportation Department |
| ALDOT | Alabama Department of Transportation |
| ANSI | American National Standards Institute |
| AO | Area Office |
| APWA | American Public Works Association |
| ASCE | American Society of Civil Engineers |
| ASDPW | American Samoa Department of Public Works |
| ASTM | American Society for Testing and Materials |
| AWP | Annual Work Plan |
