Route and guide signs — Tennessee Permit Test
Route and guide signs on the Tennessee permit test — 7 rules, each with the reason behind it and a question on it while it is fresh.
The rules
Blue and red interstate route markers show that the route is part of the national system of interstate and defense highways.
Interstate markers help you follow a long route across states. Mistaking one for a local road can send you far off track.
Blue and red signs, like the one on the right, indicate that the route is part of the national system of interstate and defense highways.
On interstate guide signs, the arrows point to the lane you should be in if you intend to enter or leave the road.
Lining up early means you do not cut across lanes at the last moment to reach your exit.
The signs are above or to the right of the highway with the arrows pointing to the lane you should be in if you intend to enter or leave the road.
If an interstate guide sign is marked EXIT ONLY, all traffic in the lanes directly below the arrows must exit.
Staying in an exit-only lane and then swerving out at the end is how sideswipes happen.
If an interstate guide sign is marked with the above sign, all traffic in the lane(s) directly below the arrows MUST exit.
U.S. route signs have black numerals on a white shield surrounded by a black background without a border.
U.S. routes cross into other states. Knowing their shield helps you stay on the road that goes where you need.
U.S. Route signs consists of black numerals on a white shield surrounded by a black background without a border.
Parking spaces with the blue handicap sign are reserved for vehicles with disabled veteran or handicapped plates or a handicapped decal; others are prohibited by law from using them.
A person in a wheelchair needs the wider space near the door. Taking it can leave them with no way in.
Parking spaces displaying this blue sign are reserved for vehicles bearing disabled veteran or handicapped license plates, or a special handicapped decal.
Green directional signs point to bike and hiking trails.
Trail signs show where bikers and hikers may cross or join the road, so expect them near.
Directional signs point to bike and hiking trails.
On urban interstates, reference markers are placed every 1,000 feet and show the route number, direction of travel and the log mile in tenths of a mile.
If you report a crash, the marker lets you tell 911 exactly where you are, so help arrives sooner.
In order to help motorists better identify their location on urban interstates, the state has installed interstate reference markers every 1,000 feet along heavily traveled sections.
On the test
What does a blue and red route marker show?
An interstate. Interstate markers help you follow a long route across states. Mistaking one for a local road can send you far off track. Tennessee Comprehensive Driver License Manual, p.40: “Blue and red signs, like the one on the right, indicate that the route is part of the national system of interstate and defense highways.”
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.
- Free to start: a 10-question test and the first section of cards. No sign-up and no account.
- 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)