In the state of Colorado, obtaining a Commercial Driver's License (CDL) requires a significant amount of preparation and knowledge of federal and state regulations. A CDL is a mandatory requirement for driving commercial vehicles, including semi-trucks, buses, and hazardous materials transport vehicles. If you are planning to pursue a career in the trucking industry or drive a large vehicle in Colorado, here's what you need to know before obtaining a Colorado CDL.
Classifying Your CDL
There are three main classes of CDLs in Colorado: Class A, Class B, and Class C. These licenses differ according to the type and size of the vehicle you'll be driving. 
- Class A: Combination vehicles with trailers over 26,001 pounds
- Class B: Heavy straight trucks, double/twin axles
- Class C: Vehicles carrying hazardous materials or more than 16 passengers
CDL Requirements
Applicants for a CDL must meet age, residency, and citizenship requirements, submit identification, and undergo a physical examination. Applicants must also pass both written and skills tests.
CDL Types
There are five categories of CDLs, which reflect the types of vehicles, materials, and cargo you'll be transporting. 
- Type A - Combination Vehicles and Hazmat
- Type B - Tractor-Trailer with Endorsement
- Type C - School Bus or Passenger
- Type D - Double/Equivalent Trailer
Tips for Obtaining CDL Success
CDL Test Preparation
Achieving a passing score on the CDL tests requires sufficient study and preparation. Consider taking practice exams and enlisting the help of a qualified instructor.
Frequently Asked Questions
Below are answers to common questions that can help navigate the CDL process.
- Do I need a CDL to drive a semi-truck in Colorado? Yes, for driving semi-trucks in the state of Colorado, you require a CDL with a Class A license.
- How do I obtain a CDL in Colorado? You must submit an application to the state Department of Motor Vehicles, pass written and skills tests, obtain a physical examination, and meet other requirements for a non-commercial driver's license.
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