The Bureau of Transportation Statistics (BTS) is a division of the U.S. Department of Transportation. It is responsible for collecting, analyzing, and disseminating statistical information related to transportation in the United States. The BTS provides data and statistics on various aspects of transportation, including air travel, highway safety, freight transportation, and public transportation. The information collected by the BTS is used by policymakers, researchers, and the public to make informed decisions and understand trends in transportation.