Commercial Driver’s License (CDL)

A Commercial Driver’s License (CDL) is a specialized license required to operate large or heavy vehicles for commercial purposes, such as trucks, buses, or vehicles transporting hazardous materials.

In the United States, CDL standards are set by the Federal Motor Carrier Safety Administration (FMCSA), while individual states are responsible for issuing licenses and administering tests. To earn a CDL, drivers must pass both written and practical exams that demonstrate their ability to safely operate commercial motor vehicles.

CDLs are divided into three main classes based on the type of vehicle being operated:

• Class A: For combination vehicles, such as tractor-trailers, that exceed specific weight thresholds
• Class B: For single, heavy vehicles like box trucks or buses
• Class C: For smaller commercial vehicles used to transport passengers or hazardous materials

In addition to these classes, drivers may need endorsements for specific types of work. Common examples include transporting passengers, carrying hazardous materials, or operating tank vehicles.

A CDL reflects a higher standard of training and qualification. For employers, it helps support compliance, improve safety, and reduce risk across commercial fleet operations.