Truck no zones — Missouri Permit Test
Truck no zones on the Missouri permit test — 6 rules, each with the reason behind it and a question on it while it is fresh.
The rules
A truck or bus has blind spots on each side, in the rear, and in the front where a car cannot be seen, and these are called the No-Zone.
Four blind spots, not one. The No-Zone is the name for all of them together, and it is where most car-truck crashes start.
These blind spots are referred to as the “No-Zone.”
If you are driving behind a truck or bus and cannot see the driver in the mirrors, that driver cannot see you.
The mirror is the only way the truck driver knows you exist. Not seeing their face means they are not seeing yours.
If you cannot see the truck driver’s face in the truck’s side mirror, the truck driver cannot see you.
Do not drive in the No-Zone except when absolutely necessary, and never drive alongside a large vehicle for prolonged periods.
Time spent invisible is time spent hoping. The lane beside a trailer is not a place to sit.
You should not drive alongside large vehicles for prolonged periods at any time.
After passing a truck, make sure you can see its cab in your rearview mirror before returning to the lane, and do not slow down once you are in front of it.
Seeing the whole cab means you have cleared the trailer. Slowing after that takes away the gap you just earned.
After you pass, make sure you can see the cab of the truck in your rearview mirror before reentering the lane.
Cutting off a truck in traffic or on the highway is particularly dangerous, so if you need to turn or change lanes, slow down and turn behind the truck instead.
A few extra seconds behind the trailer is the entire cost. The alternative is being in front of eighty thousand pounds that cannot stop.
take a moment to slow down and turn behind the truck
Tailgating a truck is dangerous, and you should leave any large vehicle a cushion of safety.
Close behind a trailer you can see nothing ahead of it, and the driver can see nothing of you.
Leave any large vehicle a cushion of safety.
On the test
What are a truck's blind spots called?
The No-Zone. Four blind spots, not one. The No-Zone is the name for all of them together, and it is where most car-truck crashes start. Missouri Driver Guide, p.29: “These blind spots are referred to as the “No-Zone.””
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
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- 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 Missouri Driver Guide, published by the Missouri Department of Revenue, and against the state code itself. Last checked 2026-09-16.
- src/assets/drivers-manuals/MO.pdf (Missouri Driver Guide, Revised August 2026, retrieved 2026-09-14)
- src/assets/drivers-manuals/MO.pages.txt (plain pdftotext over that PDF; sha256 pinned in SOURCES.json)
- src/assets/drivers-manuals/SOURCES.json (sha256, folio offset 2, folioMarker, nonLawPages and the extraction flag, each with its measured basis)