| AAR |
Association of American
Railroads |
| ATA |
American Trucking Association |
| BEA |
Bureau of Economic Analysis |
| BTS |
Bureau of Transportation Statistics |
| CB |
U.S. Census Bureau |
| CBP |
U.S. Customs and Border Protection |
| dwt |
deadweight tons |
| EPA |
U.S. Environmental Protection Agency |
| FHWA |
Federal Highway Administration |
| FRA |
Federal Railroad Administration |
| GAO |
U.S. Government Accountability Offi ce |
| GDP |
gross domestic product |
| GHG |
greenhouse gas |
| ICC |
International Chamber of Commerce |
| MARAD |
Maritime Administration |
| OECD |
Organisation for Economic Co-operation and Development |
| RITA |
Research and Innovative Technology Administration |
| TEU |
twenty-foot equivalent container unit |
| TSA |
Transportation Security Administration |
| TTI |
Texas Transportation Institute |
| USCG |
U.S. Coast Guard |
| USDHS |
U.S. Department of Homeland Security |
| USDOC |
U.S. Department of Commerce |
| USDOE |
U.S. Department of Energy |
| USDOT |
U.S. Department of Transportation |
