Warning sign rules — Tennessee Permit Test
Warning sign rules on the Tennessee permit test — 4 rules, each with the reason behind it and a question on it while it is fresh.
The rules
Warning signs alert you to conditions that might call for a reduction of speed or an action in the interest of safety.
A warning sign tells you about trouble before you can see it. Waiting to see it yourself leaves you too little time.
Warning signs alert road users to conditions that might call for a reduction of speed or an action in the interest of safety and efficient traffic operations.
The turn sign is used to mark turns with a recommended speed of 30 mph or less.
A turn sign means a bend tight enough to need low speed. Taking it at highway speed can roll a car.
The turn sign is used to mark turns with a recommended speed of 30 m.p.h. or less.
The curve sign is used to mark curves with recommended speeds between 30 and 55 mph.
A curve sign means the bend is gentler than a turn but still needs care. Going too fast still slides you wide.
The curve sign is used to mark curves with recommended speeds in the range between 30 and 55 m.p.h.
A reverse turn sign marks two turns in opposite directions less than 600 feet apart.
The second turn comes up fast after the first. If you speed up between them, you reach the second one too fast.
The reverse turn sign is used to mark two turns in opposite directions that are less than 600 feet apart.
On the test
What do warning signs alert you to?
Conditions that may call for slowing. A warning sign tells you about trouble before you can see it. Waiting to see it yourself leaves you too little time. Tennessee Comprehensive Driver License Manual, p.38: “Warning signs alert road users to conditions that might call for a reduction of speed or an action in the interest of safety and efficient traffic operations.”
How this works
Most practice tests hand you a bank of questions and leave the manual somewhere else. This one puts them together.
You read one law and the reason behind it, then answer a question on that law while it is still fresh. Get it right and you move on; get it wrong and you have found the gap while it is cheap to fix, not on the morning of the exam.
Learning one rule at a time, and proving it immediately, is what turns a manual you skimmed into something you actually know — and it makes studying feel like getting somewhere rather than like waiting to find out.
What it costs
- One payment, once — not a subscription. Nothing renews and there is nothing to cancel, for an exam you sit one time.
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- Paying opens the rest of the cards, unlimited full-length practice tests, and retests built from exactly the questions you got wrong.
- Every level up to Prepared — 3 tests passed in a row.
- Do the work, fail the real exam, and we refund you.
Where these come from
Every rule here is checked against Tennessee Comprehensive Driver License Manual, published by the Tennessee Department of Safety and Homeland Security, and against the state code itself. Last checked 2026-10-03.
- src/assets/drivers-manuals/TN.pdf (Tennessee Comprehensive Driver License Manual, information current as of July 1, 2022, Tennessee Department of Safety and Homeland Security, retrieved 2026-09-14; sha256 pinned in SOURCES.json)
- src/assets/drivers-manuals/TN.pages.txt (the plain pdftotext fixture every citation here was cut from and verified against; sha256 pinned in SOURCES.json)
- src/assets/drivers-manuals/TN-exam.html (tn.gov/safety/driver-services/classd/teengdl/knowledge-test-online.html as served on 2026-10-03; the only source for both exam figures)
- src/assets/drivers-manuals/SOURCES.json, TN entry -- the folio marker and its basis, the extraction-flag score and its welded compounds, and the record of where the exam shape comes from
- docs/plans/how-to-build-laws.md (the runbook this corpus follows)