Source transparency
Official government sources
Original government information for verifying CDL rules, licensing steps, and state requirements.
CDL Pro Hub is not a government app.
CDL Pro Hub is an independent study aid. It does not represent, and is not affiliated with or endorsed by, the FMCSA, U.S. Department of Transportation, any DMV, or any federal or state government agency.
CDL Pro Hub is an independent study aid. It does not represent, and is not affiliated with or endorsed by, the FMCSA, U.S. Department of Transportation, any DMV, or any federal or state government agency.
Original government information
Use the current official sources below before making licensing, testing, training, or safety decisions. Government requirements and manuals can change.
- FMCSA Commercial Driver's License Program — federal CDL overview from the U.S. Department of Transportation.
- FMCSA: How to get a Commercial Driver's License — official guidance on CDL steps and state manuals.
- FMCSA State Driver License Agencies — official directory of state licensing agencies. Use your state agency's current CDL manual.
- Illinois Secretary of State official CDL Study Guide — primary state manual referenced by the current practice question bank.
- Electronic Code of Federal Regulations: 49 CFR Part 383 — current federal CDL standards, requirements, and penalties.
How CDL Pro Hub uses this information
CDL Pro Hub independently summarizes and transforms CDL subject matter into educational lessons and practice questions. It does not reproduce an official exam. If app content differs from an official source, follow the current official source and your state licensing agency.
Questions about a source or correction can be sent to info@usprohub.com.