Names of the Nation's Highway Agency - 1893 to the Present
| ORI | Office of Road Inquiry (1893-1898) |
| OPRI | Office of Public Road Inquiries (1899-1905) |
| OPR | Office of Public Roads (1905-1915) |
| OPRRE | Office of Public Roads and Rural Engineering (1915-1918) |
| BPR | Bureau of Public Roads (1918-1939 & 1949-1967) |
| PRA | Public Roads Administration (1939-1949) |
| FHWA | Federal Highway Administration (April 1, 1967-) |
Other Abbreviations & Acronyms Found in the Text:
| AAA | American Automobile Association |
| AASHO | American Association of State Highway Officials |
| AASHTO | American Association of State Highway and Transportation Officials |
| ARBA | American Road Builders' Association |
| ARTBA | American Road and Transportation Builders' Association |
| ARMA | American Road Makers' Association |
| BMCS | Bureau of Motor Carrier Safety |
| DOT | Department of Transportation |
| EEO | Equal Employment Opportunity |
| EPA | Environmental Protection Agency |
| FAP | Federal-aid primary |
| FAS | Federal-aid secondary |
| FAU | Federal-aid urban |
| FRA | Federal Railroad Administration |
| FTA | Federal Transit Administration |
| ICC | Interstate Commerce Commission |
| ISTEA | Intermodal Surface Transportation Efficiency Act of 1991 |
| IRF | International Road Federation |
| IVHS | Intelligent Vehicle Highway Systems |
| HRB | Highway Research Board |
| MUTCD | Manual on Uniform Traffic Control Devices |
| NHTSA | National Highway Traffic Safety Administration |
| NEPA | National Environmental Policy Act of 1969 |
| PIARC | Permanent International Association of Road Congresses |
| PPM | Policy and Procedure Memorandum |
| PS&E | Plans, Specifications, and Estimates |
| TRB | Transportation Research Board |
| UMTA | Urban Mass Transportation Administration |
| 3R | Resurfacing, restoring, and rehabilitating |
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