CDL Initial Application Information

  • You must hold a valid regular driver license and be at least 18 years old before applying for a CDL
  • CDL school is not required, but recommended
  • You will need to visit a driver license office and successfully pass the written tests that apply to the commercial license you desire.  Click here to view CDL manual.
  • Once you have successfully passed the required exams, purchase a CDL permit for the applicable fee.

Class A - minimum exams required are

  • General knowledge
  • Combination
  • Air brakes (required if driving a vehicle with air brakes)

Class B - minimum exams required are

  • General knowledge
  • Air brakes (required if driving a vehicle with air brakes)

Class C - minimum exams required are

  • General knowledge
  • Passenger (required if carrying 16 passengers or more including driver)
  • Hazardous materials (required if transporting hazardous materials)

You will be required to

Other Information

For additional information, call 303-205-5600 or email DOR_cdlunit@state.co.us