Q. Where can I find statistics on registered vehicles and licensed drivers?
Highway Statistics Series: annual reports containing analyzed statistical information on motor fuel, motor vehicle registrations, driver licenses, highway user taxation, highway mileage, travel, and highway finance. These information are presented in tables as well as selected charts. It has been published annually since 1945.
The US DOT does not track vehicle/driver statistics on the local level (city, county, etc.). Contact Departments of Motor Vehicles at the state level.