U.S. Department of Transportation

Anthony Foxx
Secretary

Victor Mendez
Deputy Secretary

Gregory Winfree
Assistant Secretary for Research and Technology

Sophie Shulman
Deputy 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, Office of Transportation Analysis

Sonya Smith 
Project Manager

William Moore
Editor

Alpha Wingfield
Visual Information Specialist

Major Contributors:

Mindy Liu
Long Nguyen

Contributors:

Steve Beningo
Matthew Chambers
Chester Ford
Justyna Goworowska
Sean Jahanmir
Demi Riley (Spatial Front)
Jie Zhang (Spatial Front)