Commercial driver's license

A commercial driver's license (CDL) is a driver's license required under 49 CFR Parts 300-399 in the United States to operate large and heavy vehicles (including trucks, buses, and trailers) or a vehicle of any size that transports hazardous materials or more than 16 passengers (driver included). == United States == In the United States, the Commercial Motor Vehicle Safety Act of 1986 established minimum requirements that must be met when a state issues a CDL. While recreational vehicles and farm vehicles are federally exempt from requiring a CDL, federal law allows states to require a CDL for these vehicles.

Source: Wikipedia — Commercial driver's license (CC BY-SA 4.0)