Changing lanes checks — Montana Permit Test
Changing lanes checks on the Montana permit test — 5 rules, each with the reason behind it and a question on it while it is fresh.
The rules
Changing lanes includes moving from one lane to another, merging onto a roadway from an entrance ramp, and entering the roadway from the curb or shoulder.
A driver who skips the checks when pulling off the shoulder cuts into traffic just as surely as one swerving lanes.
Changing lanes includes: changing from one lane to another, merging onto a roadway from an entrance ramp, and entering the roadway from the curb or shoulder.
The areas near the rear corners of your vehicle are blind spots, which you cannot see in your mirrors; turn your head and look before you move.
A car sitting just off your back bumper does not show in any mirror, so drivers who trust mirrors merge into it.
These areas are called “blind spots” because you cannot see them through your mirrors.
When checking traffic for a lane change, check quickly: do not take your eyes off the road ahead for more than an instant.
Traffic ahead can stop while you stare over your shoulder, and you rear-end it.
Do not take your eyes off the road ahead for more than an instant.
Check the far lane, if there is one, because a driver there may be planning to move into the same lane you want.
Two drivers from opposite sides can each move into the empty middle lane and meet in it.
Be sure to check the far lane, if there is one, as someone in that lane may be planning to move into the same lane you want to enter.
Be cautious when passing a bicycle, because the cyclist may have to swerve into traffic to avoid an object on the road.
A rider who hits a pothole or glass may swing out right into the space you are driving through.
You should always be cautious when passing a bicycle because the cyclist may have to swerve into traffic to avoid an object on the road.
On the test
Which of these counts as changing lanes under the Montana manual?
Entering the road from the shoulder. A driver who skips the checks when pulling off the shoulder cuts into traffic just as surely as one swerving lanes. Montana Driver Manual, p.54: “Changing lanes includes: changing from one lane to another, merging onto a roadway from an entrance ramp, and entering the roadway from the curb or shoulder.”
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 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)