A commercial driver's license (CDL) is required to operate certain large or specialized vehicles for work—including tractor-trailers, buses, and tanker trucks. The CDL process differs significantly from a standard driver's license: it involves written knowledge tests, a skills test, medical certification, and background checks. States have specific rules about age, training hours, and testing procedures that vary by vehicle type and endorsement.
These articles explain what tests you'll take and what they cover, how medical certification works, what documents you need to bring to the DMV, the costs involved, and how endorsements (like hazmat or passenger) add to your license. You'll also find information about renewal timelines, out-of-state CDL transfers, and common mistakes that delay the process.