The Bureau of Transportation Statistics (BTS) provides high quality information to serve government, industry, and the public in a manner that promotes broad 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 U.S. Department of Transportation in the interest
of information exchange. The U.S. Government assumes no liability for its contents or use thereof.