Driver's license
The minimum driving age varies between 16 and 18 years of age in different States and Territories. After the minimum age, a graduated licensing scheme operates, with state variations.
Commercial driver's license
The minimum age to apply for a CDL is usually 21, as required by the United States Department of Transportation, although some states allow drivers who are 18 to 20 to apply for a CDL that is valid only within the driver's state of residence. A single state CDL only restricts driving of CMVs within the holder's state (not non-commercial vehicles), and automatically converts to a 50 state CDL at the age of 21.