Obtaining a commercial driver’s license (CDL) allows the driver to operate large trucks and commercial vehicles in commerce throughout the United States. Particular commercial driver’s licenses are necessary for transporting hazardous materials (hazmat), passenger vehicles, and liquid/gas tankers.
A CDL and endorsement will require passing a written test. Some require completing eight road skills tests. Hazmat drivers must also submit fingerprints and undergo a comprehensive security threat assessment performed by the Transportation Security Administration (TSA).