Tanker Endorsement
A tanker endorsement (N endorsement) is added to a CDL and authorizes drivers to operate tank vehicles transporting liquids or gases. Any vehicle with a tank capacity over 119 gallons that is used to transport liquids or gases requires this endorsement.
In Depth
Tank vehicles have unique handling characteristics. Liquid surge in partially filled tanks shifts weight dynamically during braking and turning, significantly changing vehicle stability. Drivers with tanker endorsements receive training on managing surge, roll-over risks, and emergency procedures specific to tanker operations.
The tanker endorsement requires passing a written knowledge test only — no separate skills test beyond the standard CDL. Combining a tanker endorsement with HazMat creates an X endorsement, which is required for most fuel tanker and chemical hauling work.
Tanker drivers are typically among the highest-paid CDL holders due to the specialized skills and liability. Fuel tanker drivers operating in major metro areas often earn $70,000–$100,000/year as company drivers.
Usage Example
Example: 'My CDL-A with N and H endorsements lets me haul fuel tankers. The tanker company pays $0.70/mile plus a safety bonus.'
Related Calculators
Related Terms
CDL (Commercial Driver's License)
A Commercial Driver's License (CDL) is a specialized license required to operate large commercial vehicles including semi-trucks, buses, and tankers. CDL classes are A, B, and C depending on vehicle type and weight.
HazMat Endorsement
A HazMat endorsement (H endorsement) is an additional certification added to a CDL that allows a driver to transport hazardous materials as defined by DOT regulations. It requires a TSA background check and knowledge test, and must be renewed every 5 years.
TWIC Card
A TWIC (Transportation Worker Identification Credential) card is a federal identification card issued by the TSA that grants workers unescorted access to secure areas of maritime facilities, ports, and outer continental shelf facilities. It is required for truck drivers making port deliveries.
Frequently Asked Questions
Do I need a tanker endorsement to haul fuel?
Yes. Fuel transport requires both an N (tanker) and H (HazMat) endorsement, combined as the X endorsement.