Public government sources and official state licensing handbooks.
DISCLAIMER: CDL Prep does not represent a government entity. This app is an independent study tool developed by M4 Infotech. It is not affiliated with, endorsed by, authorized by, or in any way connected to the Federal Motor Carrier Safety Administration (FMCSA), the U.S. Department of Transportation (DOT), or any state Department of Motor Vehicles (DMV), Department of Public Safety (DPS), or state licensing agency.
The core regulations, commercial motor vehicle standards, and knowledge requirements used across all 50 states originate from these official federal authorities:
Each state administers its own CDL knowledge exam based on its official commercial driver manual. Below is the complete directory of official government handbook sources referenced for state rules, licensing limits, and endorsements:
All practice questions, handbook citations, and study aids in CDL Prep are derived from these publicly available government publications. When preparing for your exam, always verify current local regulations directly in your state licensing agency's official manual. When this app and an official source disagree, the official government publication is always authoritative.
