Commercial Drivers License (CDL) Endorsements

CDL Endorsements and Restrictions:

Drivers who operate special types of CMVs also need to pass additional tests to obtain any of the following endorsements on their CDL:

T – Double/Triple Trailers Endorsement (Knowledge Test only)

P – Passenger Endorsement (Knowledge and Skills Test)

N – Tank Vehicle Endorsement (Knowledge Test only)

H – Hazardous Materials Endorsement (Knowledge Test only)

X – Combination of Tank Vehicle and Hazardous Materials Endorsement

S – School Bus Endorsement (Knowledge and Skills Test)

If a driver either fails the air brake component of the general knowledge test or performs the skills test in a vehicle not equipped with air brakes, the driver is issued an air brake restriction, restricting the driver from operating a CMV equipped with air brakes.

Source: 49 CFR 383

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