Acknowledgments

U.S. Department of Transportation

Anthony Foxx
Secretary

John Porcari
Deputy Secretary

Research and Innovative Technology Administration

Gregory Winfree
Administrator

Bureau of Transportation Statistics

Patricia Hu
Director

Rolf Schmitt
Deputy Director

Produced under the direction of:

Michael Sprung
Assistant Director for Transportation Analysis

Mindy Liu
Project Manager

William Moore
Editor

Alpha Wingfield
Visual Information Specialist

Contributors:

Steve Beningo
Sean Jahanmir
Long Nguyen