Endorsement
An authorization added to a CDL that allows the holder to operate specific types of vehicles or carry specific cargo. Common endorsements include H (hazmat), N (tanker), T (doubles/triples), P (passenger), and S (school bus).
Endorsements require passing additional knowledge tests and, in some cases, skills tests or background checks. They appear on the CDL as letter codes.
Last updated: June 4, 2026