To obtain a CDL, you must be at least: Do you currently have car insurance? Insurance is mandatory to drive in Ohio Yes I have insurance. But please show me your best quotes. No, please help me find the best insurance. Question To obtain a CDL, you must be at least: Answers 15 years old. 18 years old. 21 years old. 25 years old. Explanation In Pennsylvania, you must be at least 18 years old to obtain a CDL. To operate a commercial vehicle in interstate commerce, you must be at least 21. This questions appears in the following tests: Pennsylvania Class B Knowledge Test
