The BTS Pocket Guide to Transportation has been published for 2016, attached is the latest version (and the web-link to the source document). The brochure, prepared annually, provides vital transportation, air quality, and freight-related statistics for the U.S. and is a good source of information for the transport sector.
The PDF brochure is available below:
http://www.rita.dot.gov/bts/sites/rita.dot.gov.bts/files/Pocket%20Guide%202016.pdf