U.S. Department of Transportation
Elaine L. Chao
Secretary of Transportation
Jeffrey A. Rosen
Deputy Secretary of Transportation
Bureau of Transportation Statistics
Director, Office of Spatial Analysis and Visualization
William H. Moore
Quality Assurance Statement
The Bureau of Transportation Statistics (BTS) provides high quality information to serve government, industry, and the public in a manner that promotes public understanding. Standards and policies are used to ensure and maximize the quality, objectivity, utility, and integrity of its information. BTS reviews quality issues on a regular basis and adjusts its programs and processes to ensure continuous quality improvement.
This document is disseminated under the sponsorship of the Department of Transportation in the interest of information exchange. The U.S. Government assumes no liability for its contents or use thereof.