Commercial driver license (CDL)
Federal CDL for operating commercial motor vehicles — Class A, B, or C with optional endorsements.
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18 to drive within a single state (intrastate); 21 for interstate driving and hazardous materials (FMCSA).
Vehicles you can drive
- Semi-trucks (Class A)
- Buses (Class B)
- Hazmat vehicles
- Tankers
- Passenger transport
Categories & minimum ages
- Class ACombination vehicles over 26,001 lb (towing over 10,000 lb)18+
- Class BSingle vehicles over 26,001 lb18+
- Class CVehicles for 16+ passengers or carrying hazardous materials18+
How to get your license
Rules are set by each U.S. state's DMV, but the path is usually:
Apply for a learner permit
Meet your state's minimum age and pass the written knowledge test to get a learner permit.
Practice supervised
Complete the required supervised driving hours and any mandatory driver-education course.
Pass the road test
Pass the behind-the-wheel driving exam at your state DMV.
Get your license
Your license is issued; younger drivers usually start with graduated (provisional) restrictions.
What the theory test covers
Theory tests differ by country, but they generally assess these areas:
- Traffic signs and road markings
- Right of way and priority rules
- Speed limits and safe following distances
- Overtaking, lane discipline and roundabouts
- Vulnerable road users — pedestrians, cyclists and motorcyclists
- Alcohol, drugs, fatigue and fitness to drive
- Vehicle safety checks and required documents
- Eco-driving and the environment
Frequently asked questions
What is the minimum age for the Commercial Driver License (CDL)?
18 to drive within a single state (intrastate); 21 for interstate driving and hazardous materials (FMCSA).
What can you drive with the Commercial Driver License (CDL)?
With the Commercial Driver License (CDL) you can drive: Semi-trucks (Class A), Buses (Class B), Hazmat vehicles, Tankers, Passenger transport.
How long is the licence valid?
In the EU, car and motorcycle licences are issued for 10 to 15 years and lorry and bus licences for 5 years, after which they must be renewed. Outside the EU, validity is set locally.
How do I prepare for the test?
Practise free Commercial Driver License (CDL) theory questions and mock exams on AutoviaTest, study the road signs and rules, and take timed mock tests until you score consistently.
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