CDL Endorsement Checklist — All CDL Endorsements
Summary of all CDL endorsements (H, N, T, P, S, X), what they authorize, and what steps are required to add each to a CDL.
CDL Endorsement Guides
Endorsements expand what a CDL holder can legally drive or haul. Each endorsement requires passing specific tests. Some require additional background checks.
HazMat Endorsement (H) — TSA & Requirements
Complete guide to the CDL HazMat endorsement: who needs it, knowledge test requirements, TSA security threat assessment process, and renewal steps.
Tanker Endorsement (N) — Requirements
Who needs the CDL Tanker (N) endorsement, what it covers, and how to add it to a CDL.
Doubles/Triples Endorsement (T) — Requirements
Overview of the CDL Doubles and Triples (T) endorsement: who needs it, what it covers, and how to obtain it.
Passenger Endorsement (P) — Requirements
Overview of the CDL Passenger (P) endorsement: who needs it, knowledge and skills test requirements, and what it authorizes.
School Bus Endorsement (S) — Requirements
What the CDL School Bus (S) endorsement requires, its relation to the passenger endorsement, and why state requirements vary significantly.
Air Brake Restriction (L) — How to Remove It
The CDL air brake restriction (code L): why it is applied and the steps to remove it so you can operate air brake-equipped vehicles.
Combination Vehicle Basics for CDL Drivers
Overview of combination vehicle requirements for CDL drivers: coupling/uncoupling, off-tracking, pre-trip inspection, and backing techniques.