Side distance and night vision — Montana Permit Test
Side distance and night vision on the Montana permit test — 3 rules, each with the reason behind it and a question on it while it is fresh.
The rules
Because you cannot focus on things to the side, you must also use your side mirrors and glance to the side when needed.
A car creeping up beside you stays a blur at the edge of your eye until it is in your lane.
Because you cannot focus on things to the side, you also must use your side mirrors and glance to the side if necessary.
Judging distances and speeds takes a lot of practice, and it matters most when keeping space from other vehicles, merging and passing on two-lane roads.
A driver who misjudges a gap pulls out in front of a truck that was much closer than it looked.
It takes a lot of practice to be able to judge both.
If you have problems seeing at night, do not drive more than is necessary, and be very careful when you do.
The glare of oncoming headlights can wash out a person walking on the shoulder until you are right on them.
If you have problems seeing at night, don’t drive more than is necessary, and when you do, be very careful.
On the test
Because you cannot focus on things to your side, what must you also do?
Use side mirrors and glance to the side. A car creeping up beside you stays a blur at the edge of your eye until it is in your lane. Montana Driver Manual, p.70: “Because you cannot focus on things to the side, you also must use your side mirrors and glance to the side if necessary.”
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)