Acknowledgments

U.S. Department of Transportation

Ray LaHood
Secretary

Research and Innovative Technology Administration

Peter H. Appel
Administrator

Robert L. Bertini, Ph.D.
Deputy Administrator

Bureau of Transportation Statistics

Patricia S. Hu
Director

Steven K. Smith, Ph.D.
Deputy Director

Produced under the direction of:

David M. Chien, Ph.D.
Assistant Director

Project Manager

Theresa Firestine

Principal Author

Theresa Firestine

Major Contributor

Bingsong Fang,
MacroSys Research and Technology

Other Contributors

David Luskin, FHWA
Randal Matsunaga, FAA
Rolf Schmitt, RITA
Karen White, FHWA

RITA Editor

William H. Moore

RITA Visual Information Specialist

Alpha Wingfield