Roadfeel
How we check our content
Every rule links to the official text it comes from, and the facts behind it are matched to official sentences. Here’s how, with the numbers.
The numbers
Counted from our content and our evidence files each time this page is built.
Every rule links to its official source
We restate each rule in our own words and link it to the official section it comes from. In California, all 287 rules link to a section of the California Driver Handbook, DL 600 (REV. 6/2025), on dmv.ca.gov. California Driver Handbook
In New York, 428 of 437 rules link to a chapter or section of the New York State Driver’s Manual (MV-21); the other 9 link to another official page, such as dmv.ny.gov or New York law. 76 New York rules also link to the section of the Vehicle and Traffic Law they rest on. dmv.ny.gov: Driver’s Manual and practice tests
Each rule is also tagged as law, safety advice, DMV process or driving technique, so advice doesn’t pass for law. California: 190 law, 76 safety advice, 21 DMV process. New York: 261 law, 126 safety advice, 26 DMV process, 24 driving technique.
See for yourself, for example:
An official sentence behind the facts
For each rule and practice question we keep the official sentences that support it, copied from saved copies of the official pages, handbooks and laws. A script checks that every sentence appears word for word in its saved copy, and that every number in a rule or an explanation appears in those sentences, unless it’s marked as part of a made-up example, as a wrong answer being ruled out, or as worked out from the quoted numbers (we note how). A change that breaks either fails our checks.
| Content | California | New York |
|---|---|---|
| Rules with official sentences | 287 of 287 | 437 of 437 |
| Written-test practice questions with official sentences | 494 of 619 | 752 of 752 |
| Of these, backed only in part (we note what’s missing) | 6 rules, 8 questions | 18 rules, 41 questions |
The 125 California questions without their own entry were added in October 2026. When they were written, each was checked against an official sentence from its rule’s entry, but until they get entries of their own the script doesn’t check them.
The app’s lessons go further: every line a learner sees is sorted. 2,130 lines state a fact and carry official sentences, their own or those of the rule, road-test item or question they restate; 1,751 lines are marked as our own teaching, such as examples, tips and made-up situations; the rest are buttons, titles, prompts and short labels.
Our explanation is marked apart from the official words
The handbook is the authority; our explanation is there to help. We keep them apart:
- In the app, the reasoning we add to a lesson appears under “Intuition · our explanation”. In our newer practice questions, a sentence that starts “Our explanation:” marks reasoning the handbook doesn’t give. Older questions, and New York’s, don’t carry this mark yet: their explanations may add a short reason of ours, but never present it as the handbook’s words.
- When a rule rests on the law rather than the handbook, it says so, so you can tell the two apart. For example, the handbook sets 0.08% for drivers “over 21”; our rule says 21 or older, notes the handbook’s words and names California Vehicle Code §23152, which makes 0.08% or more illegal for every driver, whatever their age. The rule California Vehicle Code §23152
- Where official pages disagree or say nothing, we say so instead of guessing; a fact we couldn’t confirm is marked “Not verified”, as on the New York road test page.
Changes to rule content get an independent fact check
Every batch of changes to traffic-rule content (rules, practice questions, lesson facts, test facts) is checked before it goes in by a reviewer that didn’t make the change: a separate AI review agent that reads the handbook, the DMV pages and the law, quotes the official sentence for each changed item and marks anything wrong, missing or overstated. We fix what it finds, or record why we don’t, and the fixes are checked again.
Example: a brake pedal that sinks to the floor
Our rule only said to pump the brakes quickly. The handbook says to pump them quickly “by gently applying and releasing pressure”, so the rule and a practice question now say to pump quickly, pressing and releasing gently. The review checked the new wording against the handbook, page 61. The rule
Example: refusing a blood or urine test
A practice question asks how long DMV takes away your driving privilege the first time you refuse a required blood or urine test. The handbook says one year. The explanation now cites California Vehicle Code §13353 for the exception: if in the past 10 years you had a DUI conviction, or a suspension or revocation for refusing a test or for driving over the alcohol limit, it’s a revocation of 2 years, or 3 years with two or more. The review then noticed the question didn’t rule that out, so it now begins “You have no DUI record.” The answer didn’t change. California Vehicle Code §13353
Checks our scripts run before a change ships
- Official sentences: every quote is word for word in its saved copy, and every number is accounted for, as above.
- Wording: nothing that claims to be DMV’s own questions or promises a pass; Chinese follows one fixed term list (for example 路权 for right-of-way, 盲区 for blind spot), applied automatically to generated text and flagged in hand-written text.
- Copyright: no practice question repeats 10 or more words in a row from DMV’s text. We restate, quote briefly and link.
- Coverage (California): every question in DMV’s official sample tests maps to a rule we mark for the written test, and every section of the handbook has a rule or a written reason it isn’t a test point.
- This website: every link and anchor inside the site works, and each key point on a chapter page states no number its rule doesn’t.
When the handbook or the law changes
Pages about the rules and tests show when their facts were checked (for the rules: Oct 11, 2026; rules changed since then are rechecked when they change). We follow the current editions: the California Driver Handbook DL 600 (REV. 6/2025) and the web edition of the New York State Driver’s Manual (MV-21) on dmv.ny.gov.
Before each release, a script fetches the official pages our content cites and compares them with our saved copies. A changed page comes with a list of the content that cites it, so we can recheck those items against the new text. Some sites, such as dmv.ny.gov, block automated checks; the report lists those pages to check by hand.
When a law changes before the handbook does, the rule says so, with the date and the new source. For example, since 2025-10-01 clean-air-vehicle decals no longer let a solo driver use California’s carpool lanes, and the handbook hasn’t caught up yet. DMV news release, Sep 9, 2025: Clean Air Vehicle decal program ends The rule
Spanish
Spanish isn’t in the app yet. We’re preparing California in Spanish with AI translation, checked by several independent AI reviewers and scripts: each rule and question compared with DMV’s official Spanish handbook (DL 600 SPANISH), translated back to English by a separate AI that sees only the Spanish, and checked separately for facts and answers, for natural Spanish and for the legal wording, plus scripts that compare every number, date, law section and answer. So far all 1,544 California items (619 questions, 287 rules, plus chapter names, the app’s interface text, the purchase page and the glossary) have passed every layer, after the fixes the reviewers asked for. No human translator has reviewed it. In the app it will be marked beta, and if the Spanish differs from the English, the English version prevails.
Found an error? Tell us
Pages about the rules and the tests end with “Spot an error? Tell us”, which opens an email to support@roadfeel.app with the page’s address filled in. In the app, use Settings → Help & feedback → Report a problem. Add the official source if you have one.
Emails are usually answered within a few days, as the help page says: Help and support. Until a fix is out, follow the official source: if Roadfeel and an official source disagree, the official source is right. Terms of Service, section 5.
What this doesn’t mean
- Roadfeel isn’t the DMV, and isn’t affiliated with or endorsed by any DMV or government agency.
- Our practice questions are our own, not DMV’s, and we don’t promise you’ll pass; no app can. Terms of Service, section 6
- Laws, fees and procedures change, and despite these checks some content may be out of date or wrong. Terms of Service, section 5
About Roadfeel and our sources