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Built for the part that actually fails people

Most people do not fail the CDL knowledge test because they never read the manual. They fail on the numbers, and on the handful of figures their own state writes differently. Everything here exists to close that gap.

STATE ACCURACY

Questions keyed to your state, not to a national average

Most study material is written from the AAMVA model manual and sold in all fifty states. That works until a figure differs — and then you memorise the wrong number and lose a mark you had earned.

  • California uses DL 650, a 208-page state-written handbook
  • Low air pressure warning: 55 psi in the current AAMVA model manual, 60 psi in New York
  • Where a state has no variation we say so instead of inventing one

JURISDICTIONS

51

All 50 states plus the District of Columbia. Where a state manual sets a figure differently, the question follows that manual.

EXPLANATIONS

Every answer comes back with the rule behind it

A right/wrong mark teaches nothing. Each question carries the rule it tests, and each wrong option carries the specific misconception that makes it attractive.

  • The rule, in the handbook's own terms
  • Why each wrong answer looks right
  • The state the figure comes from, named

EXPLANATION COVERAGE

100%

No question ships without an explanation and per-option reasoning.

READINESS

One number that tells you whether to book the test

Coverage, accuracy and recency are weighted together across the subjects your licence class requires, so one lucky run does not inflate it and one bad day does not sink it.

  • Coverage — how much of your syllabus you have actually seen
  • Accuracy — weighted so recent answers count for more
  • Consistency — a subject you get right once does not count as learned

PASS MARK IN MOST STATES

80%

We hold your readiness score to a higher bar than the test does before we call you ready.

OFFLINE

Works in a yard with no signal

The whole bank is cached on the device. Practice sessions and the simulator both run offline, and progress syncs when you get bars back.

  • Full question bank cached locally
  • Progress queued and merged on reconnect
  • No session lost to a dead zone

CACHED ON THE DEVICE

All

Every question, downloaded once and available with no signal.

Web and app

WebApp
Browse every subject and state
Manage your plan
Answer practice questions
Timed exam simulator
Missed-question book
Works offline