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PermitProof
CA

How we know

How we check

The evidence behind every claim on this site, gathered in one place.

Who checks

An AI writes them. Then a second AI tries to break them.

Every question starts with a language model reading one section of the official state manual. It writes the questions from that section, in its own words. Nothing is copied.

That draft then goes to a second model that never sees the first one's notes. Its only job is to break the question. Does the page it cites really say this? Is the marked answer the only right one? Could a wrong answer also be right? One objection kills the question. Killed questions are deleted, never patched.

A later pass reviews the whole set at once. It checks the spread of easy and hard questions. It checks the balance of topics. It checks whether the right answer sits in the same place too often.

Then machines check every question, every time we change anything. All its fields. Exactly one correct answer. A complete citation carrying the exact document marker. No copied wording. Every sign image on the official list we published.

Where the person is. The founder decides which states get built. He approves every word of copy on pages like this one before it ships. He reviews and deploys every release himself. Nothing here publishes itself. For California he also compared samples against the handbook PDF by hand before launch. He has not personally read all 1,620 questions, and this page will never say he has.

The citation

Every answer shows its page.

Under every question, right or wrong, there is a button that says Tap the proof. It prints one line: the section of the manual, the page number in the official PDF, and the marker that says which document it is.

On that line is a link to the manual itself, on the state's own website, not ours. On a computer it opens at the cited page. Many phones open the file at page one instead, so the page number is printed right there for you to turn to.

That is the whole idea. You are not asked to trust us. You are asked to check one page. See a real one

Verified, or deleted

What we threw away

We wrote 1,821 questions across five states and shipped 1,620. The rest were deleted. Here is what was deleted and why, state by state.

We publish this because a number you cannot check is not evidence.

01 Verification funnel

1,821
Written
201
Killed
1,620
Shipped

Every shipped question was checked twice, by two independent AI passes, against that state's own official manual. The ones that failed were deleted, not fixed up.

02 Verification ledger

  • California

    Live
    California verification ledger: questions written, killed with reasons, and shipped
    StageQuestions
    Written407
    Killed: copied the handbook's wording-25
    Killed: ambiguous or two defensible answers-6
    Killed: factually wrong against the text-2
    Killed: explanation claim beyond the cited page (2026-07-16 sample audit)-1
    Shipped373

  • Ohio

    Live
    Ohio verification ledger: questions written, killed with reasons, and shipped
    StageQuestions
    Written357
    Killed: explanation or answer inaccurate against the text-5
    Killed: ambiguous or two defensible answers-3
    Killed: copied the manual's wording-3
    Killed: outside knowledge, not provable from the manual-3
    Shipped343

  • Pennsylvania

    Live
    Pennsylvania verification ledger: questions written, killed with reasons, and shipped
    StageQuestions
    Written346
    Killed: copied the manual's wording-10
    Killed: explanation or answer inaccurate against the text-7
    Killed: quality of the question as a test item-6
    Killed: outside knowledge, not provable from the manual-4
    Killed: ambiguous or two defensible answers-3
    Killed: unverifiable from the manual text-1
    Shipped315

  • New York

    Live
    New York verification ledger: questions written, killed with reasons, and shipped
    StageQuestions
    Written402
    Killed: explanation or answer inaccurate against the text-9
    Killed: copied the manual's wording-9
    Killed: outside knowledge, not provable from the manual-7
    Killed: the sign image does not match the question-4
    Killed: wording too close to the manual, pre-launch audit-4
    Killed: ambiguous or two defensible answers-1
    Killed: the sign's meaning is not in the cited page's words-1
    Killed: the cited page does not support the answer-1
    Killed: the same artwork was already used by another question-1
    Shipped365

  • Georgia

    Live
    Georgia verification ledger: questions written, killed with reasons, and shipped
    StageQuestions
    Written309
    Killed: copied the manual's wording-63
    Killed: outside knowledge, not provable from the manual-7
    Killed: explanation or answer inaccurate against the text-5
    Killed: unverifiable from the manual's readable text-4
    Killed: wrong-page citation-3
    Killed: wording too close to the manual, pre-launch audit-2
    Killed: ambiguous or two defensible answers-1
    Shipped224

Strengths and limits

What this does well, and what it does not

A model is good at reading a page of a manual and turning it into a question. It is good at reading that question back and asking whether the page really says it. It does that at a scale one person cannot.

It is bad at knowing when it is wrong. That is why nothing here rests on a model agreeing with itself. Every question has to survive three things. A second model that never saw the first one. A machine check that does not read English. And a page number you can open yourself.

The last one is the point. If we get a question wrong, you do not have to take our word that we check. You open the page and read the manual.

Evidence

Check anyone. Including us.

Two other test-prep sites disagree about California's passing score. One says 39 of 46. The other says 38 of 46. Neither shows a source. We show ours: the DMV does not publish official counts, so we report what recent test-takers consistently say, we use the stricter line, and we link our reasoning. That is the standard every claim on this site meets.1

Real signs, not lookalikes

Official MUTCD images, straight from the source

Every road sign you practice on is the federal government's own artwork, never a redrawn imitation.

03 Specimen strip

  • Red octagonal STOP sign.
    R1-1Stop
  • Downward-pointing red and white triangular YIELD sign.
    R1-2Yield
  • White rectangular regulatory sign reading SPEED LIMIT 50.
    R2-1Speed Limit
  • Black right-turn arrow inside a red circle with a red slash, prohibiting right turns.
    R3-1No Right Turn
  • Red circular DO NOT ENTER sign with a white horizontal bar.
    R5-1Do Not Enter
  • Yellow-green diamond warning sign showing a walking pedestrian.
    W11-2Pedestrian Crossing

Road sign images are official public-domain MUTCD graphics from the Federal Highway Administration.2

More states

More states, same bar

A state appears here only after its full pipeline passes: the official manual sourced and checksummed, questions written fresh from that state's own law, two independent AI verification passes, an independent audit of a seeded random sample against the official PDF, and machine checks on every claim. Nothing below is marked available until it is. How a state gets added

Sources

  1. 1. Instruction permits, California DMV. The official 80 percent passing requirement. The DMV publishes no question counts there; the counts we state are what recent test-takers consistently report. Checked July 10, 2026.
  2. 2. Standard Highway Signs, 2024 Edition (Release 3), Federal Highway Administration. The official public-domain vector files behind every sign image here. Retrieved July 10, 2026.