This database contains the number of registered automobiles, buses, trucks, motorcycles, and total vehicles.  Publicly-owned vehicles include federal, state, county, and municipal vehicles, but excludes vehicles owned by the military.  In many years, registration numbers are estimated, including recent year highlights below:

• Numbers are rounded.
• Many states do not maintain records on publicly owned motorcycles. Total may not represent an accurate count of the total number of publicly-owned motorcycles.
• Federal vehicles for 2011 reflect 2009 data.
• 2010 private and commercial buses figures are estimates
• In 2011 and 2012, Arkansas, Georgia, Iowa, Kentucky, Maine, Minnesota, Mississippi, Nevada, Oklahoma, South Dakota, Tennessee, Texas, Washington, West Virginia, Wisconsin, and Wyoming did not report registrations; instead, annual transaction data are reported.
• In 2011, Louisiana, Pennsylvania, and South Carolina did not report registrations; instead, annual transaction data are reported.
• In 2011 and 2012, Massachusetts, New Jersey, and Rhode Island did not report active registrations since they offer multi-year registrations; data are estimates.
• In 2012, Florida, did not report active registrations since they offer multi-year registrations; 2012 data are estimates.
• In 2012, New Hampshire and New York did not report data; previous year data are reported for private vehicles.
• In 2011, Illinois did not report data; 2010 data are reported
• In 2010 and 2011, California data are estimated
• In 2010, Georgia, Michigan, Texas, and Washington did not report data; figures are estimates.
• 2010 farm trucks are not included in figures for Connecticut (estimated at 6,823) New Hampshire (13,001), Pennsylvania (11,038), and Rhode Island (1,491) in 2010.
• 2012 North Carolina data are estimated from North Carolina Department of Transportation published data and other data sources.