Resource Guide
CDL (Commercial Driver's License) — Complete Guide
General information · Not legal advice.
A Commercial Driver's License (CDL) is required to operate most large or specialized commercial vehicles. Here's how the classes, endorsements, and requirements work.
When You Need a CDL
- Vehicles with a GVWR of 26,001 lbs or more
- Vehicles designed to carry 16 or more passengers (including the driver)
- Any vehicle hauling placardable hazardous materials
CDL Classes
- Class A: combination vehicles over 26,000 lbs with a towed unit over 10,000 lbs.
- Class B: single vehicles over 26,000 lbs (or towing under 10,000 lbs).
- Class C: vehicles for 16+ passengers or hazmat that don't meet Class A/B weights.
Endorsements
- H — Hazardous materials
- N — Tank vehicles
- P — Passenger
- S — School bus
- T — Doubles/triples
- X — Combined tank + hazmat
Getting Your CDL: CLP & ELDT
Most new drivers start with a Commercial Learner's Permit (CLP) and must complete Entry-Level Driver Training (ELDT) from a registered provider before testing for certain CDLs and endorsements.
Frequently Asked Questions
When is a CDL required?
A Commercial Driver's License is generally required to operate a vehicle with a gross vehicle weight rating of 26,001 pounds or more, a vehicle designed to carry 16 or more passengers (including the driver), or any size vehicle transporting hazardous materials in placardable quantities.
What are the CDL classes?
Class A is for combination vehicles over 26,000 lbs with a towed unit over 10,000 lbs. Class B is for single vehicles over 26,000 lbs (or towing under 10,000 lbs). Class C is for vehicles that carry 16+ passengers or hazardous materials but do not meet Class A or B weight thresholds.
What are CDL endorsements?
Endorsements add privileges: H (hazardous materials), N (tank vehicles), P (passenger), S (school bus), T (doubles/triples), and X (combined tank + hazmat). Each requires additional testing.
What is a CLP and ELDT?
A Commercial Learner's Permit (CLP) lets you practice before the CDL skills test. Entry-Level Driver Training (ELDT) from a registered provider is required before obtaining certain new CDLs or endorsements.
Is English proficiency required for a CDL?
Yes. Federal rules require CDL drivers to read and speak English well enough to understand highway traffic signs and signals, respond to official inquiries, and make entries on reports and records. Enforcement of this English-language proficiency requirement has been emphasized in recent years, so applicants should be prepared to demonstrate it.
Questions about CDL or compliance?
Our team can point you in the right direction.