U.S. Department of Transportation

Anthony Foxx
Secretary

Victor Mendez
Deputy Secretary

Gregory Winfree
Assistant Secretary for Research and Technology

Bureau of Transportation Statistics

Patricia Hu
Director

Rolf Schmitt
Deputy Director

Produced under the direction of:

Michael Sprung
Director for Transportation Analysis

Sonya Smith
Project Manager

William Moore
Editor

Alpha Wingfield
Visual Information Specialist

Contributors:

Steve Beningo
Matthew Chambers
Chester Ford
Justyna Goworowska
Mindy Liu
Long Nguyen
David Smallen
Jie Zhang
Siyan Zhou