Endorsements
Add endorsements. Open up better freight.
Endorsements are what let you haul the loads that pay more than dry van. Each one is a separate written test at your state licensing office. 25 study topics across four endorsements, free, no account needed.
Tank Vehicle
6 topics
Haul bulk liquids and gases safely — surge, high center of gravity, outage, and inspection.
Knowledge test only — no federal training requirement.
Start studyingDoubles & Triples
6 topics
Pull two or three trailers safely — rollover and crack-the-whip, coupling, converter dollies, and inspection.
Knowledge test only — no federal training requirement.
Start studyingPassenger
7 topics
Carry passengers safely — bus inspection, loading, road procedures, railroad crossings, and emergencies.
Written-test prep only — this endorsement also requires behind-the-wheel training we do not provide.
Start studyingSchool Bus
6 topics
Transport students safely — danger zones and mirrors, loading and unloading, crossings, student management, and evacuation.
Written-test prep only — this endorsement also requires behind-the-wheel training we do not provide.
Start studyingWhat these guides are, and what they are not
These are study guides for the written knowledge tests. Tank (N) and doubles/triples (T) have no federal entry-level driver training requirement at all — study, then test. Passenger (P) and school bus (S) do have an ELDT requirement, and it includes behind-the-wheel training that an online provider cannot deliver. For those two, use these guides to prepare for the written test and complete your ELDT with a provider that offers behind-the-wheel.
Rules on thresholds and distances vary by state and change over time. Always confirm against your current state CDL manual before testing.
Still working on your permit?
Endorsements come after the CDL itself. If you do not have your permit yet, start there.
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