Trailer requirements — Minnesota Permit Test
Trailer requirements on the Minnesota permit test — 6 rules, each with the reason behind it and a question on it while it is fresh.
The rules
A trailer may be no more than 45 feet long.
Beyond that length a trailer cannot follow the car through an ordinary intersection.
Trailer requirements Maximum length — 45 feet
A trailer may be no more than 8 feet 6 inches wide and 13 feet 6 inches high.
The width is what fits a lane and the height is what fits under a bridge.
Maximum width — 8 feet 6 inches
A trailer must carry two red tail lamps, two red reflectors and one white rear license plate lamp.
Behind the car at night the trailer is all anyone can see, so it carries its own lights.
Tail lamps — two red
All trailers with a gross vehicle weight of 3,000 pounds or more must have brakes.
Above that weight the car cannot stop the load behind it on its own brakes.
All trailers with a gross vehicle weight of 3,000 pounds or more must be equipped with brakes.
A safety chain must be permanently attached to the trailer and fastened to the towing vehicle.
If the hitch lets go, the chain is the only thing keeping the trailer from crossing the center line.
A safety chain must be permanently attached to the trailer and fastened to the vehicle used for towing.
A recreational vehicle combination may not be longer than 70 feet, and the driver must be at least 18 years old.
It is a rig as long as four cars, and the state wants an adult driving it.
A recreational vehicle combination may not be more than 70 feet in length.
On the test
What is the maximum length of a trailer in Minnesota?
45 feet. Beyond that length a trailer cannot follow the car through an ordinary intersection. Minnesota Driver’s Manual, p.79: “Trailer requirements Maximum length — 45 feet”
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.
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- Do the work, fail the real exam, and we refund you.
Where these come from
Every rule here is checked against Minnesota Driver’s Manual, published by the Minnesota Department of Public Safety, and against the state code itself. Last checked 2026-09-22.
- src/assets/drivers-manuals/MN.pdf (Minnesota Driver’s Manual, May 2025, Minnesota Department of Public Safety, Driver and Vehicle Services, retrieved 2026-09-14; sha256 pinned in SOURCES.json)
- src/assets/drivers-manuals/MN.pages.txt (the plain pdftotext fixture every citation here was cut from and verified against; sha256 pinned in SOURCES.json)
- src/assets/drivers-manuals/SOURCES.json, MN entry -- the folio offset of 3 and its basis, the folio marker, the extraction-flag score and the welded compounds it costs, and the record of where the exam shape comes from