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Acknowledgments

This document builds upon a strong foundation of supporting documentation and data prepared by a number of key agencies.

Special thanks to:

Executive Office of the President

Office of the Secretary of Transportation

Research and Innovative Technology Administration

Federal Aviation Administration

Federal Highway Administration

National Highway Traffic Safety Administration

Federal Railroad Administration

Federal Transit Administration

Federal Motor Carrier Safety Administration

Maritime Administration

Pipeline and Hazardous Materials Safety Administration

St. Lawrence Seaway Development Corporation

Office of the Inspector General, U.S. Department of Transportation

U.S. Department of Energy

Energy Information Administration

U.S. Department of Homeland Security

U.S. Customs and Border Protection
Transportation Security Administration

U.S. Census Bureau

Next Generation Air Transportation System Joint Planning and Development Office