Permit vs. License vs. CDL: What's the Difference?

A learner's permit authorizes practicing driving under supervision — typically a licensed adult in the vehicle, meeting requirements that vary by state (a minimum age, sometimes a minimum years of that adult's own driving experience). It does not authorize driving alone under any circumstance.

Getting a permit usually requires passing a written knowledge test on traffic laws, road signs, and safe-driving rules, plus a vision screening — no driving skill is demonstrated yet at this stage.

A standard driver's license authorizes driving without a supervising adult present, for a standard passenger vehicle. Reaching this stage generally requires holding a permit for a minimum length of time, logging supervised practice hours, and passing a behind-the-wheel road test in addition to the original knowledge test.

A new license often still carries some restrictions for a period (see graduated driver licensing) before becoming a fully unrestricted license — a genuinely full license and a brand-new intermediate license aren't the same thing, even though both let you drive independently.

A Commercial Driver's License (CDL) authorizes operating a commercial vehicle above a certain weight, or one carrying passengers or hazardous materials, that a standard license doesn't cover — a large truck, a bus, a tanker vehicle. It requires its own separate knowledge test, its own road skills test, and typically a Commercial Learner's Permit (CLP) held for a minimum period first.

A CDL is layered on top of an existing standard driver's license, not a replacement for one — you need a valid regular license before you can even apply for a CLP. CDLs also come in different classes (commonly A, B, and C) depending on the vehicle's weight and configuration, plus optional endorsements for specialized cargo or vehicle types.