Do I need a CDL?
To best determine if you need a CDL, you can answer a few questions and view the Iowa Department of Transportation's CDL Reference Guide (PDF).

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1. Who needs to certify their commercial driver’s license (CDL) and how do I certify?
2. How can I change my certification?
3. Where can I get a physical examination?
4. If my chosen medical examiner does not have the appropriate forms, where can the forms be obtained?
5. What will happen if I remain a nonexcepted interstate driver, but fail to renew my Medical Examiner's Certificate?
6. When do farm drivers have to meet physical qualifications?
7. Do I need a CDL?
8. What do I need to get a CDL?
9. Do I need a Commercial Learner's Permit (CLP)?