Acknowledgment

U.S. Department of Transportation

Mary E. Peters
Secretary

Research and Innovative Technology Administration

John A. Bobo, Jr.
Acting Administrator

Bureau of Transportation Statistics

Steven D. Dillingham
Associate Administrator and Director

Produced under the direction of:

Wendell Fletcher
Assistant Director for Transportation Analysis

Project Manager

Deborah Johnson

Major Contributor

Felix Ammah-Tagoe

Editor

William H. Moore

Cover Design & Report Layout

Alpha Glass Wingfield