Edge and lane lines — Montana Permit Test
Edge and lane lines on the Montana permit test — 3 rules, each with the reason behind it and a question on it while it is fresh.
The rules
Lines separating traffic moving in opposite directions are yellow; lines separating lanes going the same direction are white.
Mistaking a yellow line for a lane line can put you in a lane of cars coming at you.
Lines separating traffic moving in opposite directions are yellow.
A solid white line between lanes means stay in your lane unless a special situation requires you to change lanes.
Solid white lines often mark the approach to an exit or corner where a late lane change causes a crash.
A solid white line between lanes of traffic means that you should stay in your lane unless a special situation requires you to change lanes.
A dashed white line between lanes means you may cross it to change lanes if it is safe.
Knowing the dashed line allows a lane change lets you move over early instead of cutting in at the last second.
A dashed white line between lanes of traffic means that you may cross it to change lanes if it is safe to do so.
On the test
What color are the lines that separate traffic moving in opposite directions?
Yellow. Mistaking a yellow line for a lane line can put you in a lane of cars coming at you. Montana Driver Manual, p.34: “Lines separating traffic moving in opposite directions are yellow.”
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 Montana Driver Manual, published by the Montana Department of Justice, and against the state code itself. Last checked 2026-10-04.
- src/assets/drivers-manuals/MT.pdf (Montana Driver Manual, Revised April 2024, Montana Department of Justice, Motor Vehicle Division, retrieved 2026-09-14 and re-checked 2026-10-04; sha256 pinned in SOURCES.json)
- src/assets/drivers-manuals/MT.pages.txt (scripts/mt-text.sh: pdftotext -layout except printed pp.24-26, which are plain; the fixture every citation here was cut from and verified against; sha256 pinned in SOURCES.json)
- src/assets/drivers-manuals/MT-exam.html (Administrative Rules of Montana 23.3.121, Road Signs and Road Rules, as reproduced by the Legal Information Institute, read 2026-10-04; states the seven-miss pass mark; sha256 pinned under examSource)
- https://mvdmt.gov/forms-driver-license/ (read 2026-10-04; links the manual)