Slippery road spots — Tennessee Permit Test
Slippery road spots on the Tennessee permit test — 3 rules, each with the reason behind it and a question on it while it is fresh.
The rules
On cold, wet days, shade from trees or buildings can hide spots of ice, which freeze first and dry out last.
The road can look wet and safe in the sun, then turn to ice in the shadow of a building just ahead.
On cold, wet days, shade from trees or buildings can hide spots of ice.
Bridges and overpasses can hide spots of ice, because they tend to freeze before the rest of the road does.
Cold air passes under a bridge as well as over it, so it freezes first. The road leading up to it may still be fine.
They tend to freeze before the rest of the road does.
Close to the freezing point, the road is icy and may be more slippery than at colder temperatures.
Near freezing, a thin layer of water sits on top of the ice. That wet ice is slicker than ice in deep cold.
Close to the freezing point, the road is icy and may be more slippery than at colder temperatures.
On the test
On a cold, wet day, where can spots of ice hide?
In shade from trees or buildings. The road can look wet and safe in the sun, then turn to ice in the shadow of a building just ahead. Tennessee Comprehensive Driver License Manual, p.75: “On cold, wet days, shade from trees or buildings can hide spots of ice.”
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)