Acronyms & Abbreviations with Descriptions
| Acronym/Abbreviations | Description |
| AADT | ANNUAL AVERAGE DAILY TRAFFIC |
| AAH | ADOPT A HIGHWAY |
| AAMA | AMERICAN AUTOMOBILE MANUFACTURERS ASSOCIATION |
| AAMVA | AMERICAN ASSOCIATION OF MOTOR VEHICLE ADMINISTRATORS |
| AAR | ASSOCIATION OF AMERICAN RAIL ROADS |
| AARF | AUTOMATED ACCESS REQUEST FORM |
| AARF | AUTOMATED ACCESS REQUEST FORM (SYSTEM) |
| AASHTO | AMERICAN ASSOCIATION OF STATE HIGHWAY & TRANSPORTATION OFFICIALS |
| AASHTOWARE | AASHTOWARE PROJECT APPLICATIONS |
| AASP | ADOPTION AND SPONSORSHIP PROGRAMS |
| ABI | AVAILABLE BALANCE INDICATOR |
| ACD | ACTIVE CONTRACTS DETAILS |
| ACDBE | AIRPORT CONCESSIONAIRE DISADVANTAGED BUSINESS ENTERPRISE |
| ACH | AUTOMATED CLEARING HOUSE A SYSTEM OF THE U.S. FEDERAL RESERVE BANK THAT PROVIDES ELECTRONIC FUNDS TRANSFER (EFT) BETWEEN BANKS. |
| AD | ACTIVE DIRECTORY |
| ADA | AMERICANS WITH DISABILIITIES ACT |
| ADT | AVERAGE DAILY TRAFFIC |
| AFV | ALTERNATIVE FUEL VEHICLE |
| AIM | ADMINISTRATIVE INVESTIGATION MANAGEMENT |
| AKA | ALSO KNOWN AS |
| AMIS | ASSET MANAGEMENT INVENTORY SYSTEM |
| AMS | ASSET MAINTENANCE SCOPE |
| AMTRAK | NATIONAL RAILROAD PASSENGER CORPORATION DOING BUSINESS AS AMTRAK |
| ANR | AWARDS NOMINATION AND REVIEW |
| APE | APPRAISAL PRICE ESTIMATOR |
| APLUS | AERIAL PHOTO LOOKUP SYSTEM |
| APO | AVERAGE PASSENGER OCCUPANCY |
| APTA | AMERICAN PUBLIC TRANSPORTATION ASSOCIATION |
| AQ | AIR QUALITY |
| ARAN | AUTOMATIC ROAD ANALYZER VAN |
| ARC | ARCULUS |
| ARI | ACCOUNTS RECEIVABLE INVOICING |
| ARTBA | AMERICAN ROADS AND TRANSPORTATION BUILDERS ASSOCIATION |
| ARTS | ADVANCED RURAL TRANSPORTATION SYSTEMS |
| ASI | APPLICATIONS SYSTEMS INVENTORY |
| ASTM | AMERICAN SOCIETY OF TESTING AND MATERIALS |
| ATIS | ADVANCED TRAFFIC INFORMATION SYSTEMS |
| ATMS | ADVANCED TRAFFIC MANAGEMENT SYSTEMS |
| ATR | ANNUAL TRAFFIC RECORDER |
| ATSSA | AMERICAN TRAFFIC SAFETY SERVICES ASSOCIATION |
| AVC | AUTOMATIC VEHICLE CLASSIFICATION |
| AVCS | ADVANCED VEHICLE CONTROL SYSTEMS |
| AVL | ADVANCED VEHICLE LOCATOR |
| AVO | AVERAGE VEHICLE OCCUPANCY |
| AZUREAD | MICROSOFT AZURE ACTIVE DIRECTORY |
| AZUREB2C | MICROSOFT AZURE B2C |
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