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Acknowledgments

U.S. Department of Transportation

Mary E. Peters
Secretary

Maria Cino
Deputy Secretary

Research and Innovative Technology Administratino

John Bobo
Administrator (Acting)

Bureau of Transportation Statistics

John O'Donnell
Director (Acting)

Produced under the direction of:

Wendell Fletcher
Assistant Director for Transportation Analysis

Project Manager

Jennifer Brady

Contributors

Felix Ammah-Tagoe
David Chesser
Xiaoli Han
Getachew Mekonnen
William Moore
Lorisa Smith
Michael Sprung
Nicholas Wical
Alpha Glass-Wingfield
Jie Zhang